# Nb–Si system

> Nb–Si system: 232 accepted literature values (invariant reaction 104, formation 83, phase transition 28, crystal structure 17) and 11 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/NB-SI.html · Markdown: https://data.orchid-project.org/systems/NB-SI.md

232 accepted literature values from 8 paper(s) (experimental 34, model 189, DFT 5, unspecified 4); 11 calculated phase diagram(s). 4 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: [JSON](https://data.orchid-project.org/literature/systems/NB-SI.json) · [CSV](https://data.orchid-project.org/systems/NB-SI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#NB-SI) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-02Fer-alt.json) · [phases (12)](https://data.orchid-project.org/phases/pages/NB-SI.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/NB-SI.html) · [Markdown](https://data.orchid-project.org/systems/NB-SI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 34 |
| model | 189 |
| DFT | 5 |
| unspecified | 4 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 104 |
| phase transition | 28 |
| formation | 83 |
| crystal structure | 17 |

## Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| NbSi-02Fer-alt.tdb | P.B. Fernandes, G.C. Coelho, F. Ferreira, C.A. Nunes, B. Sundman, Intermetallics, 10, 993-99(2002). [doi:10.1016/S0966-9795(02)00125-5](https://doi.org/10.1016/S0966-9795%2802%2900125-5) | `8dad947189abee9dd6b5d4415144583c7528704b57db8d3f682e559ac9a427c7` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-02Fer-alt.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-02Fer-alt.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-02Fer-alt.json) |
| NbSi-02Fer.tdb | P.B. Fernandes, G.C. Coelho, F. Ferreira, C.A. Nunes, B. Sundman, Intermetallics, 10, 993-99(2002). [doi:10.1016/S0966-9795(02)00125-5](https://doi.org/10.1016/S0966-9795%2802%2900125-5) | `9feec68a8a1d936a8ce92846562356c07f87523507fa66826a5dd4710b2e81bb` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-02Fer.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-02Fer.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-02Fer.json) |
| NbSi-03Yan.tdb | Y. Yang, Y.A. Chang, J.-C. Zhao, B.P. Bewlay, Intermetallics, 11, 407-15(2003). [doi:10.1016/S0966-9795(03)00021-9](https://doi.org/10.1016/S0966-9795%2803%2900021-9) | `d0927671fb32f5392dff8f8465bd905eb02c7135fb7e1b198338a8ce415ceb13` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-03Yan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-03Yan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-03Yan.json) |
| NbSi-04Sha.tdb | G. Shao, Intermetallics, 12, 655-64(2004). [doi:10.1016/j.intermet.2004.03.011](https://doi.org/10.1016/j.intermet.2004.03.011) | `025b4cfcca64b229fc714a3993cc60d403790447934344f527d27ed6ab88b8eb` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-04Sha.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-04Sha.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-04Sha.json) |
| NbSi-06Dav.tdb | N. David, Y. Cartigny, T. Belmonte, J.M. Fiorani, M. Vilasi, Intermetallics, 14, 464-73(2006). [doi:10.1016/j.intermet.2005.08.013](https://doi.org/10.1016/j.intermet.2005.08.013) | `4b08671f6aca1fa7dc69f81da36c261a71237fe19486777f8ed6ad70b15630a1` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-06Dav.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-06Dav.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-06Dav.json) |
| NbSi-09Gen.tdb | T. Geng, C. Li, J. Bao, X. Zhao, Z. Du, C. Guo, Intermetallics, 17, 343-57(2009). [doi:10.1016/j.intermet.2008.11.011](https://doi.org/10.1016/j.intermet.2008.11.011) | `b11d9c4dae1a0e2341974329ac5217e29fdf98e6fe4dd74f265d2ac9d8c709b8` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-09Gen.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-09Gen.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-09Gen.json) |
| NbSi-10Gen.tdb | T. Geng, C. Li, X. Zhao, H. Xu, Z. Du, C. Guo, Calphad, 34, 363-76(2010). [doi:10.1016/j.calphad.2010.07.003](https://doi.org/10.1016/j.calphad.2010.07.003) | `e5e7beb9629a351ad6c02371ac9acd45aa8fe2af6df4928280e19030b00f8163` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-10Gen.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-10Gen.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-10Gen.json) |
| NbSi-13Li.tdb | Y. Li, C. Li, Z. Du, C. Guo, Calphad, 43, 112-23(2013). [doi:10.1016/j.calphad.2013.04.004](https://doi.org/10.1016/j.calphad.2013.04.004) | `1f452b276f51d19f6fdddf479c8ba80b0f0df6b1bbba9d7281d2596a16e9edf2` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-13Li.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-13Li.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-13Li.json) |
| NbSi-16Jac.tdb | A. Jacob, unpublished, 2016 [doi:10.1016/j.calphad.2016.04.013](https://doi.org/10.1016/j.calphad.2016.04.013) | `684fbb477b2e39d4eb479a2f592872806e047d4eadc7d9a84367758f31731123` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-16Jac.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-16Jac.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-16Jac.json) |
| NbSi-17Jac.tdb | A. Jacob, E. Povoden-Karadeniz, E. Kozeschnik, Calphad, 56, 80-91(2017). [doi:10.1016/j.calphad.2016.12.002](https://doi.org/10.1016/j.calphad.2016.12.002) | `9de41d5e8d379706af09db74c36c945f42a731fe17ef927a864141784f397d69` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-17Jac.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-17Jac.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-17Jac.json) |
| NbSi-99Lia.tdb | H. Liang, Y.A. Chang, Intermetallics, 7, 561-70(1999). [doi:10.1016/S0966-9795(98)00073-9](https://doi.org/10.1016/S0966-9795%2898%2900073-9) | `e706c2b5c4734dec5e70997fbedf3905053f043c56e7a05fa5e6a9f488915e71` | [viewer](https://orchid-project.org/phase-diagrams/#NB-SI/NbSi-99Lia.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NbSi-99Lia.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NbSi-99Lia.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| NbSi-02Fer-alt.tdb | 2241.46 | LIQUID (x(Si) 0.18626) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37541) |
| NbSi-02Fer-alt.tdb | 2241.46 | LIQUID (x(Si) 0.1862) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37541) |
| NbSi-02Fer-alt.tdb | 2211.81 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37538) |
| NbSi-02Fer-alt.tdb | 2205.84 | BCC_A2 (x(Si) 0.03583) + LIQUID (x(Si) 0.16942) + NB3SI (x(Si) 0.25) |
| NbSi-02Fer-alt.tdb | 2205.84 | BCC_A2 (x(Si) 0.03583) + LIQUID (x(Si) 0.16941) + NB3SI (x(Si) 0.25) |
| NbSi-02Fer-alt.tdb | 2150.94 | NB5SI3_D8M (x(Si) 0.40353) + LIQUID (x(Si) 0.58016) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-02Fer-alt.tdb | 1940.42 | BCC_A2 (x(Si) 0.02069) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-02Fer-alt.tdb | 1940.42 | BCC_A2 (x(Si) 0.02068) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-02Fer-alt.tdb | 1940.42 | BCC_A2 (x(Si) 0.02066) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-02Fer-alt.tdb | 1917.64 | NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.39505) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-02Fer-alt.tdb | 1679.43 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.98214) + DIAMOND_A4 (x(Si) 1) |
| NbSi-02Fer-alt.tdb | 1679.42 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.98241) + DIAMOND_A4 (x(Si) 1) |
| NbSi-02Fer.tdb | 2269.94 | LIQUID (x(Si) 0.19768) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37509) |
| NbSi-02Fer.tdb | 2269.94 | LIQUID (x(Si) 0.19765) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37509) |
| NbSi-02Fer.tdb | 2211.17 | BCC_A2 (x(Si) 0.03401) + LIQUID (x(Si) 0.16954) + NB3SI (x(Si) 0.25) |
| NbSi-02Fer.tdb | 2211.17 | BCC_A2 (x(Si) 0.03398) + LIQUID (x(Si) 0.1695) + NB3SI (x(Si) 0.25) |
| NbSi-02Fer.tdb | 2208.02 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.3751) |
| NbSi-02Fer.tdb | 2208.02 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.3751) |
| NbSi-02Fer.tdb | 2147.65 | NB5SI3_D8M (x(Si) 0.39353) + LIQUID (x(Si) 0.57358) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-02Fer.tdb | 1951.9 | BCC_A2 (x(Si) 0.02105) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-02Fer.tdb | 1951.9 | BCC_A2 (x(Si) 0.02104) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-02Fer.tdb | 1951.9 | BCC_A2 (x(Si) 0.02103) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-02Fer.tdb | 1951.9 | BCC_A2 (x(Si) 0.02104) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-02Fer.tdb | 1922.88 | NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.39502) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-02Fer.tdb | 1922.88 | NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.39503) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-02Fer.tdb | 1679.35 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.98193) + DIAMOND_A4 (x(Si) 1) |
| NbSi-02Fer.tdb | 1679.35 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.9822) + DIAMOND_A4 (x(Si) 1) |
| NbSi-03Yan.tdb | 2258.3 | LIQUID (x(Si) 0.20171) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37513) |
| NbSi-03Yan.tdb | 2258.3 | LIQUID (x(Si) 0.2017) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37513) |
| NbSi-03Yan.tdb | 2219.76 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37512) |
| NbSi-03Yan.tdb | 2219.76 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37512) |
| NbSi-03Yan.tdb | 2188.68 | BCC_A2 (x(Si) 0.03418) + LIQUID (x(Si) 0.16925) + NB3SI (x(Si) 0.25) |
| NbSi-03Yan.tdb | 2188.68 | BCC_A2 (x(Si) 0.03417) + LIQUID (x(Si) 0.16923) + NB3SI (x(Si) 0.25) |
| NbSi-03Yan.tdb | 2150.94 | NB5SI3_D8M (x(Si) 0.40784) + LIQUID (x(Si) 0.57851) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-03Yan.tdb | 1973.19 | BCC_A2 (x(Si) 0.02427) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-03Yan.tdb | 1973.19 | BCC_A2 (x(Si) 0.02425) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-03Yan.tdb | 1973.19 | BCC_A2 (x(Si) 0.02423) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-03Yan.tdb | 1973.19 | BCC_A2 (x(Si) 0.02425) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-03Yan.tdb | 1914.75 | NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.40695) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-03Yan.tdb | 1914.75 | NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.40697) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-03Yan.tdb | 1679.07 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.98133) + DIAMOND_A4 (x(Si) 1) |
| NbSi-03Yan.tdb | 1679.07 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.9816) + DIAMOND_A4 (x(Si) 1) |
| NbSi-04Sha.tdb | 2256.6 | LIQUID (x(Si) 0.21107) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37896) |
| NbSi-04Sha.tdb | 2256.6 | LIQUID (x(Si) 0.21103) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37896) |
| NbSi-04Sha.tdb | 2204.33 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37931) |
| NbSi-04Sha.tdb | 2204.33 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37931) |
| NbSi-04Sha.tdb | 2184.92 | BCC_A2 (x(Si) 0.03865) + LIQUID (x(Si) 0.17449) + NB3SI (x(Si) 0.25) |
| NbSi-04Sha.tdb | 2184.92 | BCC_A2 (x(Si) 0.03861) + LIQUID (x(Si) 0.17442) + NB3SI (x(Si) 0.25) |
| NbSi-04Sha.tdb | 2168.21 | NB5SI3_D8M (x(Si) 0.40058) + LIQUID (x(Si) 0.57731) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-04Sha.tdb | 1966.44 | BCC_A2 (x(Si) 0.03143) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-04Sha.tdb | 1966.44 | BCC_A2 (x(Si) 0.03144) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-04Sha.tdb | 1966.44 | BCC_A2 (x(Si) 0.03142) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-04Sha.tdb | 1966.44 | BCC_A2 (x(Si) 0.03142) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-04Sha.tdb | 1924.76 | NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.40186) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-04Sha.tdb | 1924.76 | NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.40187) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-04Sha.tdb | 1678.92 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.98168) + DIAMOND_A4 (x(Si) 1) |
| NbSi-04Sha.tdb | 1678.91 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.98195) + DIAMOND_A4 (x(Si) 1) |
| NbSi-06Dav.tdb | 2248.85 | LIQUID (x(Si) 0.18789) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.3751) |
| NbSi-06Dav.tdb | 2248.85 | LIQUID (x(Si) 0.18786) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.3751) |
| NbSi-06Dav.tdb | 2209.1 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37508) |
| NbSi-06Dav.tdb | 2209.1 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37508) |
| NbSi-06Dav.tdb | 2188.12 | BCC_A2 (x(Si) 0.02702) + LIQUID (x(Si) 0.16171) + NB3SI (x(Si) 0.25) |
| NbSi-06Dav.tdb | 2188.12 | BCC_A2 (x(Si) 0.02701) + LIQUID (x(Si) 0.16169) + NB3SI (x(Si) 0.25) |
| NbSi-06Dav.tdb | 2159.52 | NB5SI3_D8M (x(Si) 0.40724) + LIQUID (x(Si) 0.59245) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-06Dav.tdb | 1975.27 | BCC_A2 (x(Si) 0.01771) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-06Dav.tdb | 1975.27 | BCC_A2 (x(Si) 0.01771) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-06Dav.tdb | 1975.27 | BCC_A2 (x(Si) 0.01769) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-06Dav.tdb | 1975.27 | BCC_A2 (x(Si) 0.0177) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-06Dav.tdb | 1925.43 | NB5SI3_D8L (x(Si) 0.38215) + NB5SI3_D8M (x(Si) 0.40101) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-06Dav.tdb | 1925.43 | NB5SI3_D8L (x(Si) 0.38215) + NB5SI3_D8M (x(Si) 0.40102) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-06Dav.tdb | 1670.67 | NBSI2_C40 (x(Si) 0.66822) + LIQUID (x(Si) 0.96358) + DIAMOND_A4 (x(Si) 1) |
| NbSi-09Gen.tdb | 2249.68 | LIQUID (x(Si) 0.20304) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37523) |
| NbSi-09Gen.tdb | 2249.68 | LIQUID (x(Si) 0.20301) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37523) |
| NbSi-09Gen.tdb | 2207.38 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37519) |
| NbSi-09Gen.tdb | 2207.38 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37519) |
| NbSi-09Gen.tdb | 2188.67 | BCC_A2 (x(Si) 0.03812) + LIQUID (x(Si) 0.17307) + NB3SI (x(Si) 0.25) |
| NbSi-09Gen.tdb | 2188.67 | BCC_A2 (x(Si) 0.03811) + LIQUID (x(Si) 0.17304) + NB3SI (x(Si) 0.25) |
| NbSi-09Gen.tdb | 2145.78 | NB5SI3_D8M (x(Si) 0.40798) + LIQUID (x(Si) 0.57677) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-09Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02618) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-09Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02618) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-09Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02616) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-09Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02616) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-09Gen.tdb | 1920.62 | NB5SI3_D8L (x(Si) 0.38199) + NB5SI3_D8M (x(Si) 0.40297) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-09Gen.tdb | 1920.61 | NB5SI3_D8L (x(Si) 0.38203) + NB5SI3_D8M (x(Si) 0.40299) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-09Gen.tdb | 1679.92 | NBSI2_C40 (x(Si) 0.66825) + LIQUID (x(Si) 0.98317) + DIAMOND_A4 (x(Si) 1) |
| NbSi-10Gen.tdb | 2249.59 | LIQUID (x(Si) 0.20299) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37506) |
| NbSi-10Gen.tdb | 2249.59 | LIQUID (x(Si) 0.20296) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37506) |
| NbSi-10Gen.tdb | 2206.9 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37504) |
| NbSi-10Gen.tdb | 2206.9 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37504) |
| NbSi-10Gen.tdb | 2188.67 | BCC_A2 (x(Si) 0.03812) + LIQUID (x(Si) 0.17307) + NB3SI (x(Si) 0.25) |
| NbSi-10Gen.tdb | 2188.67 | BCC_A2 (x(Si) 0.03811) + LIQUID (x(Si) 0.17304) + NB3SI (x(Si) 0.25) |
| NbSi-10Gen.tdb | 2145.78 | NB5SI3_D8M (x(Si) 0.40798) + LIQUID (x(Si) 0.57677) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-10Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02618) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-10Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02618) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-10Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02616) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-10Gen.tdb | 1946.12 | BCC_A2 (x(Si) 0.02616) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-10Gen.tdb | 1920.62 | NB5SI3_D8L (x(Si) 0.38199) + NB5SI3_D8M (x(Si) 0.40297) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-10Gen.tdb | 1920.61 | NB5SI3_D8L (x(Si) 0.38201) + NB5SI3_D8M (x(Si) 0.40298) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-10Gen.tdb | 1679.92 | NBSI2_C40 (x(Si) 0.66825) + LIQUID (x(Si) 0.98317) + DIAMOND_A4 (x(Si) 1) |
| NbSi-13Li.tdb | 2253.4 | LIQUID (x(Si) 0.20461) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37505) |
| NbSi-13Li.tdb | 2253.39 | LIQUID (x(Si) 0.20464) + NB3SI (x(Si) 0.25) + NB5SI3_D8M (x(Si) 0.37505) |
| NbSi-13Li.tdb | 2207.02 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37502) |
| NbSi-13Li.tdb | 2207.02 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + NB5SI3_D8M (x(Si) 0.37502) |
| NbSi-13Li.tdb | 2189.01 | BCC_A2 (x(Si) 0.03809) + LIQUID (x(Si) 0.173) + NB3SI (x(Si) 0.25) |
| NbSi-13Li.tdb | 2189.01 | BCC_A2 (x(Si) 0.03807) + LIQUID (x(Si) 0.17298) + NB3SI (x(Si) 0.25) |
| NbSi-13Li.tdb | 2146.66 | NB5SI3_D8M (x(Si) 0.40814) + LIQUID (x(Si) 0.57635) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-13Li.tdb | 1946.12 | BCC_A2 (x(Si) 0.02627) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-13Li.tdb | 1946.12 | BCC_A2 (x(Si) 0.02628) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-13Li.tdb | 1946.12 | BCC_A2 (x(Si) 0.02625) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-13Li.tdb | 1946.12 | BCC_A2 (x(Si) 0.02625) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-13Li.tdb | 1917.5 | NB5SI3_D8L (x(Si) 0.38169) + NB5SI3_D8M (x(Si) 0.40271) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-13Li.tdb | 1917.5 | NB5SI3_D8L (x(Si) 0.3817) + NB5SI3_D8M (x(Si) 0.40271) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-13Li.tdb | 1680.49 | NBSI2_C40 (x(Si) 0.66826) + LIQUID (x(Si) 0.98467) + DIAMOND_A4 (x(Si) 1) |
| NbSi-16Jac.tdb | 2254.58 | LIQUID (x(Si) 0.1971) + NB3SI (x(Si) 0.25) + M5SI3_D8M (x(Si) 0.37511) |
| NbSi-16Jac.tdb | 2209.1 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.37508) |
| NbSi-16Jac.tdb | 2209.1 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.37508) |
| NbSi-16Jac.tdb | 2192.82 | BCC_A2 (x(Si) 0.00816) + LIQUID (x(Si) 0.16621) + NB3SI (x(Si) 0.25) |
| NbSi-16Jac.tdb | 2192.82 | BCC_A2 (x(Si) 0.00816) + LIQUID (x(Si) 0.16616) + NB3SI (x(Si) 0.25) |
| NbSi-16Jac.tdb | 2108.25 | M5SI3_D8M (x(Si) 0.40587) + LIQUID (x(Si) 0.58611) + MSI2_C40 (x(Si) 0.66667) |
| NbSi-16Jac.tdb | 1960.33 | BCC_A2 (x(Si) 0.00569) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-16Jac.tdb | 1960.33 | BCC_A2 (x(Si) 0.00569) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-16Jac.tdb | 1960.33 | BCC_A2 (x(Si) 0.00568) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-16Jac.tdb | 1960.33 | BCC_A2 (x(Si) 0.00568) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-16Jac.tdb | 1909.79 | NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.4006) + MSI2_C40 (x(Si) 0.66667) |
| NbSi-16Jac.tdb | 1909.79 | NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.40061) + MSI2_C40 (x(Si) 0.66667) |
| NbSi-16Jac.tdb | 1673.52 | MSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.96656) + DIAMOND_A4 (x(Si) 1) |
| NbSi-16Jac.tdb | 1673.52 | MSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.96699) + DIAMOND_A4 (x(Si) 1) |
| NbSi-17Jac.tdb | 2250.46 | LIQUID (x(Si) 0.20319) + NB3SI (x(Si) 0.25) + M5SI3_D8M (x(Si) 0.37523) |
| NbSi-17Jac.tdb | 2250.46 | LIQUID (x(Si) 0.20316) + NB3SI (x(Si) 0.25) + M5SI3_D8M (x(Si) 0.37523) |
| NbSi-17Jac.tdb | 2207.32 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.37519) |
| NbSi-17Jac.tdb | 2207.32 | NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.37519) |
| NbSi-17Jac.tdb | 2189.04 | BCC_A2 (x(Si) 0.03808) + LIQUID (x(Si) 0.173) + NB3SI (x(Si) 0.25) |
| NbSi-17Jac.tdb | 2189.04 | BCC_A2 (x(Si) 0.03807) + LIQUID (x(Si) 0.17297) + NB3SI (x(Si) 0.25) |
| NbSi-17Jac.tdb | 2145.78 | M5SI3_D8M (x(Si) 0.40798) + LIQUID (x(Si) 0.57677) + MSI2_C40 (x(Si) 0.66667) |
| NbSi-17Jac.tdb | 1944.2 | BCC_A2 (x(Si) 0.02604) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-17Jac.tdb | 1944.2 | BCC_A2 (x(Si) 0.02602) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-17Jac.tdb | 1944.2 | BCC_A2 (x(Si) 0.02602) + NB3SI (x(Si) 0.25) + NB5SI3_D8L (x(Si) 0.375) |
| NbSi-17Jac.tdb | 1906.78 | NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.40267) + MSI2_C40 (x(Si) 0.66667) |
| NbSi-17Jac.tdb | 1906.77 | NB5SI3_D8L (x(Si) 0.375) + M5SI3_D8M (x(Si) 0.40266) + MSI2_C40 (x(Si) 0.66667) |
| NbSi-17Jac.tdb | 1679.89 | MSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.9828) + DIAMOND_A4 (x(Si) 1) |
| NbSi-17Jac.tdb | 1679.88 | MSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.98307) + DIAMOND_A4 (x(Si) 1) |
| NbSi-99Lia.tdb | 2248.62 | LIQUID (x(Si) 0.16909) + NB3SI (x(Si) 0.25) + NB5SI3 (x(Si) 0.375) |
| NbSi-99Lia.tdb | 2248.62 | LIQUID (x(Si) 0.16905) + NB3SI (x(Si) 0.25) + NB5SI3 (x(Si) 0.375) |
| NbSi-99Lia.tdb | 2248.62 | LIQUID (x(Si) 0.16903) + NB3SI (x(Si) 0.25) + NB5SI3 (x(Si) 0.375) |
| NbSi-99Lia.tdb | 2187.96 | BCC_A2 (x(Si) 0.0258) + LIQUID (x(Si) 0.1523) + NB3SI (x(Si) 0.25) |
| NbSi-99Lia.tdb | 2187.96 | BCC_A2 (x(Si) 0.0258) + LIQUID (x(Si) 0.15229) + NB3SI (x(Si) 0.25) |
| NbSi-99Lia.tdb | 2176.94 | NB5SI3 (x(Si) 0.375) + LIQUID (x(Si) 0.60666) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-99Lia.tdb | 2176.94 | NB5SI3 (x(Si) 0.375) + LIQUID (x(Si) 0.60638) + NBSI2_C40 (x(Si) 0.66667) |
| NbSi-99Lia.tdb | 1943.06 | BCC_A2 (x(Si) 0.01341) + NB3SI (x(Si) 0.25) + NB5SI3 (x(Si) 0.375) |
| NbSi-99Lia.tdb | 1943.06 | BCC_A2 (x(Si) 0.0134) + NB3SI (x(Si) 0.25) + NB5SI3 (x(Si) 0.375) |
| NbSi-99Lia.tdb | 1943.06 | BCC_A2 (x(Si) 0.0134) + NB3SI (x(Si) 0.25) + NB5SI3 (x(Si) 0.375) |
| NbSi-99Lia.tdb | 1662.23 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.95821) + DIAMOND_A4 (x(Si) 1) |
| NbSi-99Lia.tdb | 1662.23 | NBSI2_C40 (x(Si) 0.66667) + LIQUID (x(Si) 0.95822) + DIAMOND_A4 (x(Si) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/NB/NB-SI.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/NB/NB-SI.json) · [CALPHAD hull NbSi-02Fer-alt](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-02Fer-alt.json) · [CALPHAD hull NbSi-02Fer](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-02Fer.json) · [CALPHAD hull NbSi-03Yan](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-03Yan.json) · [CALPHAD hull NbSi-04Sha](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-04Sha.json) · [CALPHAD hull NbSi-06Dav](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-06Dav.json) · [CALPHAD hull NbSi-09Gen](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-09Gen.json) · [CALPHAD hull NbSi-10Gen](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-10Gen.json) · [CALPHAD hull NbSi-13Li](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-13Li.json) · [CALPHAD hull NbSi-16Jac](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-16Jac.json) · [CALPHAD hull NbSi-99Lia](https://data.orchid-project.org/hulls/calphad-sgte/NB/NB-SI--NbSi-99Lia.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Nb–Si system (104)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 2270.15 | L + βNb5Si3 -> Nb3Si | L: Si 0.198; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 2, p. 5, row 7; `ORC-2YKM7IBDVM` |  |
| 2270 | L + βNb5Si3 -> Nb3Si | L: Si 0.198; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 12; `ORC-MCBKQRDHVK` |  |
| 2259.15 | Liq + βNb5Si3->Nb3Si | Liq: Si 0.202; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [3] Yang 2003 | Table 2, p. 2, row 4; `ORC-ART32HFF5K` |  |
| 2259.15 | L + βNb5Si3 -> Nb3Si | L: Si 0.202; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [1] Shao 2004; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 2, p. 5, row 6; `ORC-MMHKGSUSZS` |  |
| 2259 | L + βNb5Si3 -> Nb3Si | L: Si 0.202; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 14; `ORC-C3UFQDP2J5` |  |
| 2257 | L + βNb5Si3 -> Nb3Si | L: Si 0.211; βNb5Si3: Si 0.377; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 15; `ORC-7RXTRCWFMS` |  |
| 2253.15 | Liq + βNb5Si3->Nb3Si | Liq: Si 0.195; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 5; `ORC-6NOC6FUSBQ` |  |
| 2253.15 | L + Nb5Si3 -> Nb3Si | L: Si 0.195; Nb5Si3: Si 0.375; Nb3Si: Si 0.25 | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | Table 1, p. 2, row 4; `ORC-JDBOWWGRLH` |  |
| 2253.15 | peritectic: peritectic reaction |  | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | p. 2; `ORC-OPBOVRBHVL` | “The Nb3Si phase is formed by a peritectic reaction at 1980 C \[14\]; however, the decomposition temperature of this phase is less certain.” |
| 2253 | L + βNb5Si3 -> Nb3Si | L: Si 0.195; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 9; `ORC-VXQUUPNSKA` |  |
| 2250.15 | L + β(Nb5Si3) -> Nb3Si | L: Si 0.203; β(Nb5Si3): Si 0.375; Nb3Si: Si 0.25 | model | [5] Geng 2009 | Table 2, p. 3, row 3; `ORC-75E3HJEW2V` |  |
| 2249.15 | L + β(Nb5Si3) -> Nb3Si | L: Si 0.188; β(Nb5Si3): Si 0.375; Nb3Si: Si 0.25 | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 4; `ORC-LZDU3SCKOI` |  |
| 2249 | L + βNb5Si3 -> Nb3Si | L: Si 0.188; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [2] David 2006 | Table 6, p. 7, row 16; `ORC-FJBCBN3YPY` |  |
| 2248.15 | L + Nb5Si3 -> Nb3Si | L: Si 0.17; Nb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [4] Liang 1999 | Table 1, p. 2, row 3; `ORC-FY7DQJSOBH` |  |
| 2248.15 | L + βNb5Si3 -> Nb3Si | L: Si 0.195; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [1] Shao 2004; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 2, p. 5, row 5; `ORC-SIVRPY5O4P` |  |
| 2248 | L + βNb5Si3 -> Nb3Si | L: Si 0.17; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 6, p. 7, row 11; `ORC-MSGWJYZQ4W` |  |
| 2248 | L + βNb5Si3 -> Nb3Si | L: Si 0.195; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 10; `ORC-QR4CY5RT2P` |  |
| 2241 | L + βNb5Si3 -> Nb3Si | L: Si 0.186; βNb5Si3: Si 0.375; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 13; `ORC-KXP7D3S5BL` |  |
| 2220.15 | βNb5Si3 + Nb3Si->Nb5Si3 | βNb5Si3: Si 0.375; Nb3Si: Si 0.25; Nb5Si3: Si 0.375 | model | [3] Yang 2003 | Table 2, p. 2, row 17; `ORC-TCCYXPMYRK` |  |
| 2220 | βNb5Si3 + NbSi3 -> αNb5Si3 | βNb5Si3: Si 0.375; NbSi3: Si 0.25; αNb5Si3: Si 0.375 | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 52; `ORC-7TNIJ2Q74N` |  |
| 2213.15 | βNb5Si3 + Nb3Si->Nb5Si3 | βNb5Si3: Si 0.375; Nb3Si: Si 0.25; Nb5Si3: Si 0.375 | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 18; `ORC-32LEKM5ZVI` |  |
| 2213 | βNb5Si3 + NbSi3 -> αNb5Si3 | βNb5Si3: Si 0.375; NbSi3: Si 0.25; αNb5Si3: Si 0.375 | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 48; `ORC-5RYEGE7KJ6` |  |
| 2212 | βNb5Si3 + NbSi3 -> αNb5Si3 | βNb5Si3: Si 0.375; NbSi3: Si 0.25; αNb5Si3: Si 0.375 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 51; `ORC-Q5EV6ETWEM` |  |
| 2211.15 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.17; (Nb): Si 0.034; Nb3Si: Si 0.25 | model | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 2, p. 5, row 3; `ORC-G2LPJ5JIGL` |  |
| 2211 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.17; (Nb): Si 0.034; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 4; `ORC-SOW2BBJIJE` |  |
| 2209.15 | Nb3Si + β(Nb5Si3) -> α(Nb5Si3) | Nb3Si: Si 0.25; β(Nb5Si3): Si 0.375; α(Nb5Si3): Si 0.375 | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 8; `ORC-76ZODALB37` |  |
| 2209 | βNb5Si3 + NbSi3 -> αNb5Si3 | βNb5Si3: Si 0.375; NbSi3: Si 0.25; αNb5Si3: Si 0.375 | model | [2] David 2006 | Table 6, p. 7, row 54; `ORC-HHOU7BRKLY` |  |
| 2208 | βNb5Si3 + NbSi3 -> αNb5Si3 | βNb5Si3: Si 0.375; NbSi3: Si 0.25; αNb5Si3: Si 0.375 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 50; `ORC-DAYZJOEVY5` |  |
| 2208 | βNb5Si3 + NbSi3 -> αNb5Si3 | βNb5Si3: Si 0.375; NbSi3: Si 0.25; αNb5Si3: Si 0.375 | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 49; `ORC-FRFIPLVR5B` |  |
| 2207.15 | Nb3Si + β(Nb5Si3) -> α(Nb5Si3) | Nb3Si: Si 0.25; β(Nb5Si3): Si 0.375; α(Nb5Si3): Si 0.375 | model | [5] Geng 2009 | Table 2, p. 3, row 7; `ORC-27AGJKYEZM` |  |
| 2206 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.169; (Nb): Si 0.036; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 5; `ORC-CT22BA23A3` |  |
| 2204 | βNb5Si3 + NbSi3 -> αNb5Si3 | βNb5Si3: Si 0.375; NbSi3: Si 0.25; αNb5Si3: Si 0.375 | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 53; `ORC-3VIKK4YUJM` |  |
| 2193.15 | Liq->β(Nb,Si) + Nb3Si | Liq: Si 0.175; β(Nb,Si): Si 0.035; Nb3Si: Si 0.25 | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 2; `ORC-4EIVBB4IAK` |  |
| 2193.15 | L(Nb) + Nb3Si | L: Si 0.175; (Nb): Si 0.035; Nb3Si: Si 0.25 | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | Table 1, p. 2, row 2; `ORC-H3KRLNWGQ4` |  |
| 2193 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.187; (Nb): Si 0.035; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 1; `ORC-C3VXO65ZWG` |  |
| 2189.15 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.173; (Nb): Si 0.038; Nb3Si: Si 0.25 | model | [5] Geng 2009 | Table 2, p. 3, row 1; `ORC-C7OCXSO4CZ` |  |
| 2189.15 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.178; (Nb): Si 0.034; Nb3Si: Si 0.25 | model | [1] Shao 2004; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 2, p. 5, row 2; `ORC-KHJLXOC22F` |  |
| 2189.15 | Liq->β(Nb,Si) + Nb3Si | Liq: Si 0.178; β(Nb,Si): Si 0.034; Nb3Si: Si 0.25 | model | [3] Yang 2003 | Table 2, p. 2, row 1; `ORC-SDURAJCOEG` |  |
| 2189 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.178; (Nb): Si 0.034; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 6; `ORC-6RU7B23C2S` |  |
| 2188.15 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.162; (Nb): Si 0.027; Nb3Si: Si 0.25 | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 2; `ORC-DHQQTFM5TO` |  |
| 2188.15 | L(Nb) + Nb3Si | L: Si 0.153; (Nb): Si 0.0258; Nb3Si: Si 0.25 | model | [4] Liang 1999 | Table 1, p. 2, row 1; `ORC-PNM2ZTHQLC` |  |
| 2188.15 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.175; (Nb): Si 0.035; Nb3Si: Si 0.25 | model | [1] Shao 2004; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 2, p. 5, row 1; `ORC-T3MTBFI77Y` |  |
| 2188 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.153; (Nb): Si 0.0258; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 6, p. 7, row 3; `ORC-4FTLJN6IJQ` |  |
| 2188 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.175; (Nb): Si 0.035; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 2; `ORC-7IODUL35PL` |  |
| 2188 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.162; (Nb): Si 0.027; Nb3Si: Si 0.25 | model | [2] David 2006 | Table 6, p. 7, row 8; `ORC-D3Z43S7UTJ` |  |
| 2185.15 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.174; (Nb): Si 0.0386; Nb3Si: Si 0.25 | model | [1] Shao 2004 | Table 2, p. 5, row 4; `ORC-Z7H4FUAOXS` |  |
| 2185 | eutectic: L -> (Nb) + Nb3Si | L: Si 0.174; (Nb): Si 0.0386; Nb3Si: Si 0.25 | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 7; `ORC-PS7PNBESPM` |  |
| 2177.15 | eutectic: L -> Nb5Si3 + NbSi2 | L: Si 0.607; Nb5Si3: Si 0.375; NbSi2: Si 0.667 | model | [4] Liang 1999 | Table 1, p. 2, row 7; `ORC-EVGMRVYUNI` |  |
| 2177 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.607; βNb5Si3: Si 0.375; NbSi2: Si 0.667 | model | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 6, p. 7, row 27; `ORC-D2J5N2B5S4` |  |
| 2173.15 | eutectic: L -> Nb5Si3 + NbSi2 | L: Si 0.57; Nb5Si3: Si 0.405; NbSi2: Si 0.667 | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | Table 1, p. 2, row 8; `ORC-F5ZQXZNKMA` |  |
| 2173.15 | eutectic: Liq->βNb5Si3 + NbSi2 | Liq: Si 0.57; βNb5Si3: Si 0.405; NbSi2: Si 0.667 | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 11; `ORC-YX5AFSPUGD` |  |
| 2173 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.57; βNb5Si3: Si 0.385; NbSi2: Si 0.667 | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 25; `ORC-KYUKQXC3ED` |  |
| 2169 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.578; βNb5Si3: Si 0.4; NbSi2: Si 0.667 | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 31; `ORC-OTR7HGLQOE` |  |
| 2168 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.57; βNb5Si3: Si 0.405; NbSi2: Si 0.667 | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 26; `ORC-BSMTLESATG` |  |
| 2160.15 | eutectic: L -> β(Nb5Si3) + (NbSi2) | L: Si 0.592; β(Nb5Si3): Si 0.407; (NbSi2): Si 0.667 | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 10; `ORC-ULHBRXC4O6` |  |
| 2160 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.592; βNb5Si3: Si 0.407; NbSi2: Si 0.667 | model | [2] David 2006 | Table 6, p. 7, row 32; `ORC-WIW37ZTOCX` |  |
| 2151.15 | eutectic: Liq->βNb5Si3 + NbSi2 | Liq: Si 0.578; βNb5Si3: Si 0.401; NbSi2: Si 0.667 | model | [3] Yang 2003 | Table 2, p. 2, row 10; `ORC-VOOKPBBVFZ` |  |
| 2151 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.578; βNb5Si3: Si 0.401; NbSi2: Si 0.667 | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 30; `ORC-2VMGU5O3PM` |  |
| 2151 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.58; βNb5Si3: Si 0.404; NbSi2: Si 0.667 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 29; `ORC-UKA6R6A7LK` |  |
| 2146.15 | eutectic: L -> β(Nb5Si3) + (NbSi2) | L: Si 0.577; β(Nb5Si3): Si 0.408; (NbSi2): Si 0.667 | model | [5] Geng 2009 | Table 2, p. 3, row 9; `ORC-X7NJGUAIR5` |  |
| 2141 | eutectic: L -> βNb5Si3 + NbSi2 | L: Si 0.574; βNb5Si3: Si 0.394; NbSi2: Si 0.667 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 28; `ORC-MWM27YD2DG` |  |
| 2138.15 | eutectic: Liq->βNb5Si3 + NbSi2 | βNb5Si3: Si 0.375; NbSi2: Si 0.666667 | experimental | [3] Yang 2003; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 2, p. 2, row 12; `ORC-FOS7SZS3UH` |  |
| 2043.15 | Nb3Si->β(Nb,Si) + Nb5Si3 | Nb3Si: Si 0.25; β(Nb,Si): Si 0.024; Nb5Si3: Si 0.375 | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 7; `ORC-ACW4JUII3Q` |  |
| 2043.15 | eutectoid: Nb3Si=(Nb)+Nb5Si3 |  | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | p. 2; `ORC-EBS4PWTVW6.8365fd` | “Since the eutectoid reaction, Nb3Si=(Nb)+Nb5Si3, is extremely slow, the measured temperature of Mendiratta and Dimiduk \[23\] by isothermal measurements, i.e. 1670 C, is accepted rather than that of Kocherzhinskiy et al. \[14\] by DTA analysis, i.e. 1770 C.” |
| 2043 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.005; βNb5Si3: Si 0.375 | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 17; `ORC-LR5UNOJ22G` |  |
| 2038 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.016; βNb5Si3: Si 0.375 | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 18; `ORC-LMFCI7PQ7B` |  |
| 1975.15 | Nb3Si -> (Bcc) + β(Nb5Si3) | Nb3Si: Si 0.25; (Bcc): Si 0.018; β(Nb5Si3): Si 0.375 | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 6; `ORC-KLTXRCDYNZ` |  |
| 1975 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.018; βNb5Si3: Si 0.375 | model | [2] David 2006 | Table 6, p. 7, row 24; `ORC-BM3ZEPEKAT` |  |
| 1973.15 | Nb3Si->β(Nb,Si) + Nb5Si3 | Nb3Si: Si 0.25; β(Nb,Si): Si 0.028; Nb5Si3: Si 0.375 | model | [3] Yang 2003 | Table 2, p. 2, row 6; `ORC-5BRDCXVO3U` |  |
| 1973.15 | Nb3Si->β(Nb,Si) + Nb5Si3 | Nb3Si: Si 0.25; β(Nb,Si): Si 0.5; Nb5Si3: Si 0.375 | experimental | [3] Yang 2003; _cites Bewlay 2001_ | Table 2, p. 2, row 8; `ORC-CY4A3UT2WS` |  |
| 1973 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.028; βNb5Si3: Si 0.375 | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 22; `ORC-JEKEEGVNLC` |  |
| 1966 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.031; βNb5Si3: Si 0.375 | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 23; `ORC-ND26GFDZAD` |  |
| 1952 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.021; βNb5Si3: Si 0.375 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 20; `ORC-ZTT3RFVFON` |  |
| 1946.15 | Nb3Si -> (Bcc) + β(Nb5Si3) | Nb3Si: Si 0.25; (Bcc): Si 0.026; β(Nb5Si3): Si 0.375 | model | [5] Geng 2009 | Table 2, p. 3, row 5; `ORC-H326L6PVLX` |  |
| 1943.15 | eutectoid: Nb3Si=(Nb)+Nb5Si3 |  | experimental | [4] Liang 1999; _cites Mendiratta 1991_ [doi](https://doi.org/10.1016/0956-716x%2891%2990387-g) | p. 2; `ORC-EBS4PWTVW6.e14f70` | “Since the eutectoid reaction, Nb3Si=(Nb)+Nb5Si3, is extremely slow, the measured temperature of Mendiratta and Dimiduk \[23\] by isothermal measurements, i.e. 1670 C, is accepted rather than that of Kocherzhinskiy et al. \[14\] by DTA analysis, i.e. 1770 C.” |
| 1943.15 | Nb3Si -> (Nb) + Nb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.0134; Nb5Si3: Si 0.375 | model | [4] Liang 1999 | Table 1, p. 2, row 5; `ORC-FLSXAMYFH3` |  |
| 1943.15 | Nb3Si->β(Nb,Si) + Nb5Si3 | Nb3Si: Si 0.25; β(Nb,Si): Si 0.5; Nb5Si3: Si 0.375 | experimental | [3] Yang 2003; _cites Mendiratta 1991_ [doi](https://doi.org/10.1016/0956-716x%2891%2990387-g) | Table 2, p. 2, row 9; `ORC-MDCUVLPDS7` |  |
| 1943.15 | Nb3Si -> (Nb) + Nb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.016; Nb5Si3: Si 0.375 | experimental | [4] Liang 1999; _cites Mendiratta 1991_ [doi](https://doi.org/10.1016/0956-716x%2891%2990387-g) | Table 1, p. 2, row 6; `ORC-NR2Q5R6S5P` |  |
| 1943 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.0134; βNb5Si3: Si 0.375 | model | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 6, p. 7, row 19; `ORC-XT5AXA55XM` |  |
| 1940 | Nb3Si -> (Nb) + βNb5Si3 | Nb3Si: Si 0.25; (Nb): Si 0.021; βNb5Si3: Si 0.375 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 21; `ORC-FKIZXWE4XC` |  |
| 1926.15 | β(Nb5Si3) -> α(Nb5Si3) + (NbSi2) | β(Nb5Si3): Si 0.401; α(Nb5Si3): Si 0.382; (NbSi2): Si 0.667 | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 12; `ORC-XNXK4RMNBI` |  |
| 1926 | βNb5Si3 -> αNb5Si3 + NbSi2 | βNb5Si3: Si 0.401; αNb5Si3: Si 0.382; NbSi2: Si 0.667 | model | [2] David 2006 | Table 6, p. 7, row 47; `ORC-HITPL7J2CN` |  |
| 1925 | βNb5Si3 -> αNb5Si3 + NbSi2 | βNb5Si3: Si 0.401; αNb5Si3: Si 0.375; NbSi2: Si 0.667 | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 46; `ORC-Q6Y3QP3MVV` |  |
| 1923.15 | βNb5Si3->Nb5Si3 + NbSi2 | βNb5Si3: Si 0.395; Nb5Si3: Si 0.375; NbSi2: Si 0.667 | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 16; `ORC-5CRB5R2E6U` |  |
| 1923 | βNb5Si3 -> αNb5Si3 + NbSi2 | βNb5Si3: Si 0.395; αNb5Si3: Si 0.385; NbSi2: Si 0.667 | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 41; `ORC-YWR5M5NHNO` |  |
| 1922 | βNb5Si3 -> αNb5Si3 + NbSi2 | βNb5Si3: Si 0.395; αNb5Si3: Si 0.375; NbSi2: Si 0.667 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 43; `ORC-VOUIGGGKU2` |  |
| 1921.15 | β(Nb5Si3) -> α(Nb5Si3) + (NbSi2) | β(Nb5Si3): Si 0.403; α(Nb5Si3): Si 0.382; (NbSi2): Si 0.667 | model | [5] Geng 2009 | Table 2, p. 3, row 11; `ORC-IEYLH77A6P` |  |
| 1918 | βNb5Si3 -> αNb5Si3 + NbSi2 | βNb5Si3: Si 0.395; αNb5Si3: Si 0.385; NbSi2: Si 0.667 | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 42; `ORC-5XEW6B7ORF` |  |
| 1918 | βNb5Si3 -> αNb5Si3 + NbSi2 | βNb5Si3: Si 0.395; αNb5Si3: Si 0.375; NbSi2: Si 0.667 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 44; `ORC-NSXY4EHLXZ` |  |
| 1915.15 | βNb5Si3->Nb5Si3 + NbSi2 | βNb5Si3: Si 0.395; Nb5Si3: Si 0.375; NbSi2: Si 0.667 | model | [3] Yang 2003 | Table 2, p. 2, row 15; `ORC-3WFX2QPIYQ` |  |
| 1915 | βNb5Si3 -> αNb5Si3 + NbSi2 | βNb5Si3: Si 0.395; αNb5Si3: Si 0.375; NbSi2: Si 0.667 | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 45; `ORC-42E7XOZVMB` |  |
| 1680.15 | eutectic: L -> Nb(Ti)Si2 + Si | L: Si 0.983; Nb(Ti)Si2: Si 0.669; Si: Si 1 | model | [5] Geng 2009 | Table 2, p. 3, row 13; `ORC-22APO3ZYVR` |  |
| 1679.15 | eutectic: Liq->NbSi2 + (Si) | Liq: Si 0.982; NbSi2: Si 0.667; (Si): Si 1 | model | [3] Yang 2003 | Table 2, p. 2, row 13; `ORC-4KDWSKO4UV` |  |
| 1679 | eutectic: L -> NbSi2 + (Si) | L: Si 0.982; NbSi2: Si 0.667; (Si): Si 1 | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 38; `ORC-3ABYGYVVH7` |  |
| 1679 | eutectic: L -> NbSi2 + (Si) | L: Si 0.982; NbSi2: Si 0.667; (Si): Si 1 | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 36; `ORC-3AJHHIKZLY` |  |
| 1679 | eutectic: L -> NbSi2 + (Si) | L: Si 0.982; NbSi2: Si 0.667; (Si): Si 1 | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 39; `ORC-VKLE2CNNLC` |  |
| 1673.15 | eutectic: L -> NbSi2 + (Si) | L: Si 0.98; NbSi2: Si 0.688; (Si): Si 1 | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | Table 1, p. 2, row 10; `ORC-BLU5JYAYRZ` |  |
| 1673.15 | eutectic: Liq->NbSi2 + (Si) | Liq: Si 0.98; NbSi2: Si 0.667; (Si): Si 1 | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 14; `ORC-YYR6EC43CO` |  |
| 1673 | eutectic: L -> NbSi2 + (Si) | L: Si 0.98; NbSi2: Si 0.667; (Si): Si 1 | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 33; `ORC-ZUMPMPT7KF` |  |
| 1671.15 | eutectic: L -> Nb(Ti)Si2 + Si | L: Si 0.964; Nb(Ti)Si2: Si 0.668; Si: Si 1 | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 14; `ORC-RXF22RFIFE` |  |
| 1671 | eutectic: L -> NbSi2 + (Si) | L: Si 0.964; NbSi2: Si 0.668; (Si): Si 1 | model | [2] David 2006 | Table 6, p. 7, row 40; `ORC-SQ2CAVLN3T` |  |
| 1668 | eutectic: L -> NbSi2 + (Si) | L: Si 0.98; NbSi2: Si 0.667; (Si): Si 1 | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 34; `ORC-WOS5BWXHAM` |  |
| 1663.15 | eutectic: L -> NbSi2 + (Si) | L: Si 0.958; NbSi2: Si 0.667; (Si): Si 1 | model | [4] Liang 1999 | Table 1, p. 2, row 9; `ORC-KTC3HXSBQR` |  |
| 1663 | eutectic: L -> NbSi2 + (Si) | L: Si 0.958; NbSi2: Si 0.667; (Si): Si 1 | model | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 6, p. 7, row 35; `ORC-LO54XJKW2S` |  |

## Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from [dft_parity.json](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, Nb–Si system (83)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| (NbSi2) | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -53.7 kJ/mol-atom ± 1.6 | 273.15 | experimental | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [5] Geng 2009; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 3, p. 4, row 10; `ORC-MDJMCVRYSE.1f557a` |  |
| (NbSi2) | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -51.2033 kJ/mol-atom | 273.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [5] Geng 2009 | Table 3, p. 4, row 7; `ORC-M5MZBNJBK5` |  |
| (NbSi2) | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom | 273.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [5] Geng 2009; _cites Barin 1977_ | Table 3, p. 4, row 8; `ORC-AMMWQUBKMU` |  |
| (NbSi2) | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom | 273.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [5] Geng 2009; _cites Chart 1973_ | Table 3, p. 4, row 9; `ORC-PXRD4KUPTR` |  |
| Nb3Si |  | -37.3 kJ/mol (basis unstated) | 0 | DFT |  |  | [6] Utton 2017; _cites Papadimitriou 2015_ [doi](https://doi.org/10.1007/s11661-015-3149-0) | Table 2, p. 6, row 11; `ORC-H4A2C3P26Y` |  |
| Nb3Si | [Nb3Si](https://data.orchid-project.org/compounds/Nb3Si.html) | -35.85 kJ/mol-atom | 298.15 | model | -40.615 (mp-aaaabakm) | -42.633 (oqmd-2033) | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 3, p. 6, row 4; `ORC-6ICZLOG2AB` |  |
| Nb3Si |  | -34.73 kJ/mol (basis unstated) | 0 | DFT |  |  | [6] Utton 2017; _cites Papadimitriou 2015_ [doi](https://doi.org/10.1007/s11661-015-3149-0) | Table 2, p. 6, row 15; `ORC-KOBBW4DSPM` |  |
| Nb3Si |  | -33.75 per mol-atom | 298.15 | model |  |  | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 3, p. 6, row 22; `ORC-KWVLTCABHF` |  |
| Nb3Si |  | -33.357 kJ/mol (basis unstated) | 298.15 | model |  |  | [6] Utton 2017 | Table 2, p. 6, row 12; `ORC-JWSBVNHBNK` |  |
| Nb3Si | [Nb3Si](https://data.orchid-project.org/compounds/Nb3Si.html) | -33.163 kJ/mol-atom | 298.15 | model | -40.615 (mp-aaaabakm) | -42.633 (oqmd-2033) | [1] Shao 2004; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 3, p. 6, row 1; `ORC-T2Z475FDRC` |  |
| Nb3Si |  | -32 kJ/mol (basis unstated) | 298.15 | model |  |  | [6] Utton 2017 | Table 2, p. 6, row 16; `ORC-HWQNBEHH2K` |  |
| Nb3Si | [Nb3Si](https://data.orchid-project.org/compounds/Nb3Si.html) | -30.301 kJ/mol-atom | 298.15 | model | -40.615 (mp-aaaabakm) | -42.633 (oqmd-2033) | [1] Shao 2004; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 3, p. 6, row 2; `ORC-HIXXLBV3DH` |  |
| Nb3Si | [Nb3Si](https://data.orchid-project.org/compounds/Nb3Si.html) | -29.6425 kJ/mol-atom | 298.15 | model | -40.615 (mp-aaaabakm) | -42.633 (oqmd-2033) | [1] Shao 2004 | Table 3, p. 6, row 5; `ORC-LNB6D3ORYX` |  |
| Nb3Si | [Nb3Si](https://data.orchid-project.org/compounds/Nb3Si.html) | -28.175 kJ/mol-atom | 298.15 | model | -40.615 (mp-aaaabakm) | -42.633 (oqmd-2033) | [4] Liang 1999; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 2, p. 4, row 9; `ORC-527UGG2XQ5` |  |
| Nb3Si | [Nb3Si](https://data.orchid-project.org/compounds/Nb3Si.html) | -28.175 kJ/mol-atom | 298.15 | model | -40.615 (mp-aaaabakm) | -42.633 (oqmd-2033) | [1] Shao 2004; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 3, p. 6, row 3; `ORC-K7KBPE7NTQ` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -64.792 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 3, p. 6, row 6; `ORC-N7NYRFHQSW` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -64.6 kJ/mol-atom ± 2.4 | 298.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 3, p. 6, row 9; `ORC-H2QQ35B76K.0b3ce5` |  |
| Nb5Si3 |  | -63.001 kJ/mol (basis unstated) | 298.15 | model |  |  | [6] Utton 2017 | Table 2, p. 6, row 4; `ORC-EWMB3SRKGY` |  |
| Nb5Si3 |  | -62.658 per mol-atom | 298.15 | model |  |  | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 3, p. 6, row 23; `ORC-AVHJT2KBYW` |  |
| Nb5Si3 |  | -61.2 kJ/mol (basis unstated) | 0 | DFT |  |  | [6] Utton 2017; _cites Papadimitriou 2015_ [doi](https://doi.org/10.1007/s11661-015-3149-0) | Table 2, p. 6, row 3; `ORC-MA72BGHW5F` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -61 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004; _cites Chart 1973_ | Table 3, p. 6, row 11; `ORC-FOQWOPIIZJ` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -60.887 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004 | Table 3, p. 6, row 13; `ORC-JVOY3NZOF2` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -60.887 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 3, p. 6, row 12; `ORC-S5CPI5JI2P` |  |
| Nb5Si3 |  | -58.2 kJ/mol (basis unstated) | 0 | DFT |  |  | [6] Utton 2017; _cites Papadimitriou 2015_ [doi](https://doi.org/10.1007/s11661-015-3149-0) | Table 2, p. 6, row 7; `ORC-UQIISK46K5` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -57 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004; _cites Barin 2004_ | Table 3, p. 6, row 10; `ORC-WV5DN42ZZ4` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -52 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 3, p. 6, row 7; `ORC-QSJXR2PWWX` |  |
| Nb5Si3 |  | -50.636 kJ/mol (basis unstated) | 298.15 | model |  |  | [6] Utton 2017 | Table 2, p. 6, row 8; `ORC-PXGGLNZ3SN` |  |
| Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -47.69 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [1] Shao 2004; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 3, p. 6, row 8; `ORC-XH56NHZPX5` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -90.7 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 7, p. 8, row 3; `ORC-M6YI3ZG6ZU.664291` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -59.37 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [4] Liang 1999; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 2, p. 4, row 7; `ORC-3LN3PBDH7S` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -59.37 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 3, p. 6, row 19; `ORC-OONHAKUF7E` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -56 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 3, p. 6, row 20; `ORC-7BGJPC6UD2` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -56 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [7] Fernandes 2002 | Table 3, p. 6, row 7; `ORC-OBSCZ5RGJF` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -56 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 7, p. 8, row 8; `ORC-OR7P6CYI7R.950143` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -56 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 7, p. 8, row 10; `ORC-T5APMLGDOY.762f19` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -56 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004 | Table 3, p. 6, row 21; `ORC-VHPXKX5UDO` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -55.5 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 7, p. 8, row 7; `ORC-6A2WC4LPZP.1799de` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -55.5 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 7, p. 8, row 9; `ORC-TSPGIBJDSC.6da2bb` |  |
| NbSi2 |  | -55.483 per mol-atom | 298.15 | model |  |  | [1] Shao 2004; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 3, p. 6, row 24; `ORC-5L2QGISI2N` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -55.467 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 3, p. 6, row 17; `ORC-JRQ5HR4OLC` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -55.4667 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [7] Fernandes 2002 | Table 3, p. 6, row 6; `ORC-KCTLOGHEMW` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -53.7 kJ/mol-atom | 298.15 | experimental | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [7] Fernandes 2002; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 3, p. 6, row 8; `ORC-25YMX5AZDL` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -53.7 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 7, p. 8, row 5; `ORC-AO642VMZO5.7b85c3` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -53.7 kJ/mol-atom ± 1.6 | 298.15 | experimental | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 3, p. 6, row 15; `ORC-D2GEUAFSA3.17618f` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -51.5 kJ/mol-atom | 298.15 | unspecified | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006 | Table 7, p. 8, row 11; `ORC-5B3XLKKPF3.afe0f1` |  |
| NbSi2 |  | -51.2 kJ/mol (basis unstated) | 298.15 | model |  |  | [6] Utton 2017 | Table 2, p. 6, row 20; `ORC-UEWLRKY6AH` |  |
| NbSi2 |  | -49.9 kJ/mol (basis unstated) | 0 | DFT |  |  | [6] Utton 2017; _cites Papadimitriou 2015_ [doi](https://doi.org/10.1007/s11661-015-3149-0) | Table 2, p. 6, row 19; `ORC-AJZQKV43NY` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -47 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [4] Liang 1999 | Table 2, p. 4, row 5; `ORC-5NMVMEQTMX` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -47 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 7, p. 8, row 6; `ORC-LLYIQM4PHA.1e077b` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -47 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 3, p. 6, row 18; `ORC-QPELC4H3AG` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004; _cites Chart 1973_ | Table 3, p. 6, row 14; `ORC-2ZTCYVL23H` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [4] Liang 1999; _cites Niessen 1981_ [doi](https://doi.org/10.1016/0022-5088%2881%2990200-9) | Table 2, p. 4, row 8; `ORC-5VHEDUXEW4` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom | 298.15 | unspecified | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Niessen 1981_ [doi](https://doi.org/10.1016/0022-5088%2881%2990200-9) | Table 7, p. 8, row 4; `ORC-6H3EOWZ5VR.378965` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom | 298.15 | model | -48.426 (mp-aaaaadri) | -53.117 (oqmd-2027994) | [1] Shao 2004; _cites Barin 2004_ | Table 3, p. 6, row 16; `ORC-6M6IYNTWXJ` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom ± 16 | 298.15 | model | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [4] Liang 1999; _cites Chart 1973_ | Table 2, p. 4, row 6; `ORC-HGFSOJSSNW` |  |
| NbSi2 | [NbSi2](https://data.orchid-project.org/compounds/NbSi2.html) | -46 kJ/mol-atom | 298.15 | experimental | -48.427 (mp-aaaaarxo) | -53.121 (oqmd-30789) | [2] David 2006; _cites Chart 1973_ | Table 7, p. 8, row 2; `ORC-OWMXI4C2MG.e1e30a` |  |
| α(Nb5Si3) | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -65.379 kJ/mol-atom | 273.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [5] Geng 2009; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 3, p. 4, row 4; `ORC-RZLCOOXKFO` |  |
| α(Nb5Si3) | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -64.6 kJ/mol-atom ± 2.4 | 273.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [5] Geng 2009; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 3, p. 4, row 2; `ORC-IWJLELXHAM.752c54` |  |
| α(Nb5Si3) | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -63.8 kJ/mol-atom | 273.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [5] Geng 2009; _cites Gorelkin 1972_ | Table 3, p. 4, row 3; `ORC-USOVYAEYSE` |  |
| α(Nb5Si3) | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -63.0044 kJ/mol-atom | 273.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [5] Geng 2009 | Table 3, p. 4, row 1; `ORC-FTN4KSTZWI` |  |
| α(Nb5Si3) | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -61 kJ/mol-atom | 273.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [5] Geng 2009; _cites Chart 1973_ | Table 3, p. 4, row 6; `ORC-2RBOATHKB4` |  |
| α(Nb5Si3) | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -57 kJ/mol-atom | 273.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [5] Geng 2009; _cites Barin 1977_ | Table 3, p. 4, row 5; `ORC-LKZCCXGAJK` |  |
| α-Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -63.8 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [4] Liang 1999; _cites Gorelkin 1972_ | Table 2, p. 4, row 2; `ORC-ULZ2MKVVFH` |  |
| α-Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -60.7 kJ/mol-atom ± 13 | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [4] Liang 1999; _cites Chart 1973_ | Table 2, p. 4, row 3; `ORC-HQTSXUS7V3` |  |
| α-Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -52 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [4] Liang 1999 | Table 2, p. 4, row 1; `ORC-SL47WER6XI` |  |
| α-Nb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -47.69 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [4] Liang 1999; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 2, p. 4, row 4; `ORC-FCR2NGRTRE` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -66.4 kJ/mol-atom | 298.15 | unspecified | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006 | Table 7, p. 8, row 11; `ORC-5B3XLKKPF3.70b83b` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -65.379 kJ/mol-atom | 298.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [7] Fernandes 2002; _cites Nunes_ | Table 3, p. 6, row 5; `ORC-FSRUIRZJG4` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -65.3 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Kaufman 1979_ [doi](https://doi.org/10.1016/0364-5916%2879%2990020-8) | Table 7, p. 8, row 3; `ORC-M6YI3ZG6ZU.c46220` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -64.8 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 7, p. 8, row 9; `ORC-TSPGIBJDSC.343b72` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -64.6 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 7, p. 8, row 5; `ORC-AO642VMZO5.a07d6c` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -64.6 kJ/mol-atom | 298.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [7] Fernandes 2002; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900504-0) | Table 3, p. 6, row 3; `ORC-KZDYU66P5R` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -63.8 kJ/mol-atom | 298.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Gorelkin 1972_ | Table 7, p. 8, row 1; `ORC-5QFZ2F6H7K` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -63.8 kJ/mol-atom | 298.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [7] Fernandes 2002; _cites Gorelkin 1972_ | Table 3, p. 6, row 4; `ORC-FCT7QRGYPB` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -62.7 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 7, p. 8, row 7; `ORC-6A2WC4LPZP.9bcd50` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -62.6575 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [7] Fernandes 2002 | Table 3, p. 6, row 1; `ORC-2R6YUPDYN5` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -60.9 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 7, p. 8, row 8; `ORC-OR7P6CYI7R.e2ea90` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -60.9 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 7, p. 8, row 10; `ORC-T5APMLGDOY.d07abf` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -60.8871 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [7] Fernandes 2002 | Table 3, p. 6, row 2; `ORC-5XUMFE3CWP` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -60.7 kJ/mol-atom | 298.15 | experimental | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Chart 1973_ | Table 7, p. 8, row 2; `ORC-OWMXI4C2MG.5b54dc` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -56 kJ/mol-atom | 298.15 | unspecified | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Niessen 1981_ [doi](https://doi.org/10.1016/0022-5088%2881%2990200-9) | Table 7, p. 8, row 4; `ORC-6H3EOWZ5VR.0ad79a` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -56 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 7, p. 8, row 10; `ORC-T5APMLGDOY.cc3ca4` |  |
| αNb5Si3 | [Nb5Si3](https://data.orchid-project.org/compounds/Nb5Si3.html) | -52 kJ/mol-atom | 298.15 | model | -62.965 (mp-aaaaaugk) | -65.593 (oqmd-3572) | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 7, p. 8, row 6; `ORC-LLYIQM4PHA.da7bba` |  |

## Other properties

### Phase transition (28)

Table: Phase transition, Nb–Si system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 2200 K | 2200 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 6, p. 7, row 65; `ORC-YK64FOMLSO` |  |
| Phase transition | 2200.15 K | 2200.15 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [4] Liang 1999 | Table 1, p. 2, row 13; `ORC-UJ2E2WYTXO` |  |
| Phase transition | 2208 K | 2208 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 64; `ORC-JJTPVCC6A5` |  |
| Phase transition | 2213 K | 2213 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 63; `ORC-7HSL235WW7` |  |
| Phase transition | 2213.15 K | 2213.15 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | Table 1, p. 2, row 14; `ORC-RALMHOZRJW` |  |
| Phase transition | 2213.15 K | 2213.15 | L->NbSi2; _L: Si 0.667; NbSi2: Si 0.666667_ | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 22; `ORC-W5S2TBLRTK` |  |
| Phase transition | 2218 K | 2218 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006 | Table 6, p. 7, row 70; `ORC-OIBJ5VN3N4` |  |
| Phase transition | 2218.15 K | 2218.15 | L -> (NbSi2); _L: Si 0.667_ | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 18; `ORC-B6IE6SZ432` |  |
| Phase transition | 2225 K | 2225 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 67; `ORC-GAF6BTGEKV` |  |
| Phase transition | 2229 K | 2229 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 68; `ORC-MIYXKSTAEA` |  |
| Phase transition | 2229.15 K | 2229.15 | L->NbSi2; _L: Si 0.667; NbSi2: Si 0.666667_ | model | [3] Yang 2003 | Table 2, p. 2, row 21; `ORC-GG3M3H63SB` |  |
| Phase transition | 2230 K | 2230 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 69; `ORC-SOBID237LH` |  |
| Phase transition | 2235.15 K | 2235.15 | L -> (NbSi2); _L: Si 0.667_ | model | [5] Geng 2009 | Table 2, p. 3, row 17; `ORC-GTGT76OMYN` |  |
| Phase transition | 2236 K | 2236 | L -> NbSi2; _L: Si 0.667; NbSi2: Si 0.667_ | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 66; `ORC-57T4WHCLO6` |  |
| Phase transition | 2763 K | 2763 | L -> βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [2] David 2006; _cites Liang 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900073-9) | Table 6, p. 7, row 57; `ORC-JG7AUCYJIR` |  |
| Phase transition | 2763.15 K | 2763.15 | L -> Nb5Si3; _L: Si 0.375; Nb5Si3: Si 0.375_ | model | [4] Liang 1999 | Table 1, p. 2, row 11; `ORC-M7DIGMIUT5` |  |
| Phase transition | 2788 K | 2788 | L -> βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [2] David 2006; _cites Schlesinger 1993_ [doi](https://doi.org/10.1007/bf02671971) | Table 6, p. 7, row 56; `ORC-IUIJJZC5DW` |  |
| Phase transition | 2791 K | 2791 | L -> βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 59; `ORC-FX7IEKBQK2` |  |
| Phase transition | 2793 K | 2793 | L -> βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [2] David 2006; _cites Okamoto 1990_ | Table 6, p. 7, row 55; `ORC-UCFDXRX3P3` |  |
| Phase transition | 2793.15 K | 2793.15 | L -> Nb5Si3; _L: Si 0.375; Nb5Si3: Si 0.375_ | experimental | [4] Liang 1999; _cites Kocherzhinskiy 1980_ | Table 1, p. 2, row 12; `ORC-SQILVUSUJH` |  |
| Phase transition | 2793.15 K | 2793.15 | L->βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | experimental | [3] Yang 2003; _cites Kocherzhinskiy 1980_ | Table 2, p. 2, row 20; `ORC-26SSRX4UTM` |  |
| Phase transition | 2796 K | 2796 | L -> βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [2] David 2006; _cites Yang 2003_ [doi](https://doi.org/10.1016/s0966-9795%2803%2900021-9) | Table 6, p. 7, row 60; `ORC-4GGSJM5HPJ` |  |
| Phase transition | 2796.15 K | 2796.15 | L->βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [3] Yang 2003 | Table 2, p. 2, row 19; `ORC-Q4I3MBOFLV` |  |
| Phase transition | 2797 K | 2797 | L -> βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [2] David 2006; _cites Fernandes 2002_ [doi](https://doi.org/10.1016/s0966-9795%2802%2900125-5) | Table 6, p. 7, row 58; `ORC-TKTNDO43WB` |  |
| Phase transition | 2797 K | 2797 | L -> βNb5Si3; _L: Si 0.375; βNb5Si3: Si 0.375_ | model | [2] David 2006 | Table 6, p. 7, row 62; `ORC-XDZ5NZSEMY` |  |
| Phase transition | 2797.15 K | 2797.15 | L -> β(Nb5Si3); _L: Si 0.375_ | model | [5] Geng 2009; _cites David 2006_ [doi](https://doi.org/10.1016/j.intermet.2005.08.013) | Table 2, p. 3, row 16; `ORC-N6INJ656BO` |  |
| Phase transition | 2799.15 K | 2799.15 | L -> β(Nb5Si3); _L: Si 0.39_ | model | [5] Geng 2009 | Table 2, p. 3, row 15; `ORC-BWYUBBTPOL` |  |
| Phase transition | 2806 K | 2806 | L -> βNb5Si3; _L: Si 0.378; βNb5Si3: Si 0.378_ | model | [2] David 2006; _cites Shao 2004_ [doi](https://doi.org/10.1016/j.intermet.2004.03.011) | Table 6, p. 7, row 61; `ORC-5NDJ4BG6MS` |  |

### Crystal structure (17)

Table: Crystal structure, Nb–Si system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 10.23 Å | 298.15 | Nb3Si; _alloy: Si 0.25_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 4; `ORC-B57QGRI5VR.453965` |  |
| Lattice a | 10.224 Å | 298.15 | Nb3Si; _alloy: Nb 0.75, Si 0.25_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 4; `ORC-V2OMPUFMOB.7cdfd8` |  |
| Lattice a | 4.81 Å | 298.15 | NbSi2; _alloy: Si 0.666667_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 7; `ORC-FW2DDMK7O3.8d9c63` |  |
| Lattice a | 4.81 Å | 298.15 | NbSi2; _alloy: Nb 0.333333, Si 0.666667_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 7; `ORC-T62MMVLANG.2a5abb` |  |
| Lattice a | 6.56 Å | 298.15 | αNb5Si3; _alloy: Si 0.375_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 5; `ORC-AFXHWUZ5YF.d5e6b8` |  |
| Lattice a | 6.571 Å | 298.15 | αNb5Si3; _alloy: Nb 0.625, Si 0.375_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 6; `ORC-AMQXTFYITK.87d6c3` |  |
| Lattice a | 10.03 Å | 298.15 | βNb5Si3; _alloy: Si 0.375_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 6; `ORC-DIGRLXRAH4.5934e6` |  |
| Lattice a | 10.04 Å | 298.15 | βNb5Si3; _alloy: Nb 0.625, Si 0.375_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 5; `ORC-IEQVH7XBOQ.c77747` |  |
| Lattice c | 5.18 Å | 298.15 | Nb3Si; _alloy: Si 0.25_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 4; `ORC-B57QGRI5VR.792561` |  |
| Lattice c | 5.189 Å | 298.15 | Nb3Si; _alloy: Nb 0.75, Si 0.25_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 4; `ORC-V2OMPUFMOB.35d931` |  |
| Lattice c | 6.61 Å | 298.15 | NbSi2; _alloy: Si 0.666667_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 7; `ORC-FW2DDMK7O3.b79590` |  |
| Lattice c | 6.61 Å | 298.15 | NbSi2; _alloy: Nb 0.333333, Si 0.666667_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 7; `ORC-T62MMVLANG.988fc7` |  |
| Lattice c | 11.86 Å | 298.15 | αNb5Si3; _alloy: Si 0.375_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 5; `ORC-AFXHWUZ5YF.8719c1` |  |
| Lattice c | 11.889 Å | 298.15 | αNb5Si3; _alloy: Nb 0.625, Si 0.375_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 6; `ORC-AMQXTFYITK.933a32` |  |
| Lattice c | 5.07 Å | 298.15 | βNb5Si3; _alloy: Si 0.375_ | model | [8] Li 2013; _cites Daams 1991_ | Table 1, p. 2, row 6; `ORC-DIGRLXRAH4.7f0d03` |  |
| Lattice c | 5.081 Å | 298.15 | βNb5Si3; _alloy: Nb 0.625, Si 0.375_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 5; `ORC-IEQVH7XBOQ.134a45` |  |
| lattice gamma | 120 ° | 298.15 | NbSi2; _alloy: Nb 0.333333, Si 0.666667_ | model | [1] Shao 2004; _cites Villars 1991_ | Table 1, p. 2, row 7; `ORC-T62MMVLANG.3a5154` |  |

## Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

1. G. Shao, Thermodynamic assessment of the Nb–Si–Al system, Intermetallics 12, 655-664 (2004). [doi:10.1016/j.intermet.2004.03.011](https://doi.org/10.1016/j.intermet.2004.03.011)
2. N. David, Y. Cartigny, T. Belmonte, J.M. Fiorani, M. Vilasi, Thermodynamic description of the Cr–Nb–Si isothermal section at 1473K, Intermetallics 14, 464-473 (2006). [doi:10.1016/j.intermet.2005.08.013](https://doi.org/10.1016/j.intermet.2005.08.013)
3. Y Yang, Y.A Chang, J.-C Zhao, B.P Bewlay, Thermodynamic modeling of the Nb–Hf–Si ternary system, Intermetallics 11, 407-415 (2003). [doi:10.1016/s0966-9795(03)00021-9](https://doi.org/10.1016/s0966-9795%2803%2900021-9)
4. H. Liang, Y.A. Chang, Thermodynamic modeling of the Nb–Si–Ti ternary system, Intermetallics 7, 561-570 (1999). [doi:10.1016/s0966-9795(98)00073-9](https://doi.org/10.1016/s0966-9795%2898%2900073-9)
5. Tai Geng, Changrong Li, Jing Bao, Xinqing Zhao, Zhenmin Du, Cuiping Guo, Thermodynamic assessment of the Nb–Si–Ti system, Intermetallics 17, 343-357 (2009). [doi:10.1016/j.intermet.2008.11.011](https://doi.org/10.1016/j.intermet.2008.11.011)
6. Claire A. Utton, Ioannis Papadimitriou, Hajime Kinoshita, Panos Tsakiropoulos, Experimental and thermodynamic assessment of the Ge-Nb-Si ternary phase diagram, Journal of Alloys and Compounds 717, 303-316 (2017). [doi:10.1016/j.jallcom.2017.04.279](https://doi.org/10.1016/j.jallcom.2017.04.279)
7. P.B. Fernandes, G.C. Coelho, F. Ferreira, C.A. Nunes, B. Sundman, Thermodynamic modeling of the Nb–Si system, Intermetallics 10, 993-999 (2002). [doi:10.1016/s0966-9795(02)00125-5](https://doi.org/10.1016/s0966-9795%2802%2900125-5)
8. Yan Li, Changrong Li, Zhenmin Du, Cuiping Guo, Thermodynamic optimization of the Nb–Si–W ternary system, Calphad 43, 112-123 (2013). [doi:10.1016/j.calphad.2013.04.004](https://doi.org/10.1016/j.calphad.2013.04.004)

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735569
- R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735891
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0).

Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

```bibtex
@misc{orchid_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).