# Cr–Nb system

> Cr–Nb system: 204 accepted literature values (phase equilibrium 77, phase transition 74, formation 25, crystal structure 15) and 7 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

204 accepted literature values from 3 paper(s) (experimental 155, model 14, DFT 31, unspecified 4); 7 calculated phase diagram(s). 38 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/CR-NB.json) · [CSV](https://data.orchid-project.org/systems/CR-NB.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CR-NB) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-09Pav.json) · [phases (7)](https://data.orchid-project.org/phases/pages/CR-NB.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CR-NB.html) · [Markdown](https://data.orchid-project.org/systems/CR-NB.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 155 |
| model | 14 |
| DFT | 31 |
| unspecified | 4 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 10 |
| phase transition | 74 |
| phase equilibrium | 77 |
| formation | 25 |
| heat capacity / entropy / enthalpy | 1 |
| activity / EMF / Gibbs energy | 2 |
| crystal structure | 15 |

## 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 |
|---|---|---|---|
| CrNb-09Pav.tdb | J. Pavlu, J. Vrestal, M. Sob, Calphad, 33, 179-86(2009). [doi:10.1016/j.calphad.2008.04.006](https://doi.org/10.1016/j.calphad.2008.04.006) | `73a70da7700dd8e219e8a46bf1f0010626a71166dff8e170600209727453abc1` | [viewer](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-09Pav.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrNb-09Pav.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrNb-09Pav.json) |
| CrNb-14Sch.tdb | C. Schmetterer, A. Khvan, A. Jacob, B. Hallstedt, T. Markus J. Phase Equilib. Diffus., 35, 434-44(2014). [doi:10.1007/s11669-014-0313-y](https://doi.org/10.1007/s11669-014-0313-y) | `b90da552cf8915412d03414adccc3e70299b4c2bccbfeb41f7d5fdc3831b29b9` | [viewer](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-14Sch.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrNb-14Sch.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrNb-14Sch.json) |
| CrNb-15Lu.tdb | H.-J. Lu, W.-B. Wang, N. Zou, J.-Y. Shen, X.-G. Lu, Y.-L. He, Calphad, 50, 134-43(2015). [doi:10.1016/j.calphad.2015.06.002](https://doi.org/10.1016/j.calphad.2015.06.002) | `b80dfce45f08a88cafcfdf284d475c993d6eb4b520f970e99cc9cd8aa07fcbcc` | [viewer](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-15Lu.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrNb-15Lu.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrNb-15Lu.json) |
| CrNb-16Pen.tdb | Y. Peng, P. Zhou, M. Bu, W. Zhang, Y. Du, Calphad, 53, 10-19(2016). [doi:10.1016/j.calphad.2016.02.004](https://doi.org/10.1016/j.calphad.2016.02.004) | `e22b1db4c4e94cba83eab6326dbc46f889fa67e527ceae8d5b54ef2208e0f339` | [viewer](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-16Pen.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrNb-16Pen.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrNb-16Pen.json) |
| CrNb-17Laf.tdb | P. Lafaye, C. Toffolon-Masclet, J.-C. Crivello, J.-M. Joubert, Calphad, 57, 37-45(2017). [doi:10.1016/j.calphad.2017.02.003](https://doi.org/10.1016/j.calphad.2017.02.003) | `22b23d29a6033b0964655ebe70410f0623ef58b9b95a3d70c98240666ecd12be` | [viewer](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-17Laf.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrNb-17Laf.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrNb-17Laf.json) |
| CrNb-18Jia.tdb | Y. Jiang, S. Zomorodpoosh, I. Roslyakova, L. Zhang, Calphad, 62, 109-18(2018). [doi:10.1016/j.calphad.2018.06.001](https://doi.org/10.1016/j.calphad.2018.06.001) | `b31829d9849c209382189a6cb1af1acdb30b3c3f952ec8cb0640cc4803218bb3` | [viewer](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-18Jia.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrNb-18Jia.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrNb-18Jia.json) |
| CrNb-93Cos-LB.tdb | J.G. Costa Neto, S.G. Fries, H.L. Lukas, S. Garna, G. Effenberg, Calphad, 17, 219-28(1993). [doi:10.1016/0364-5916(93)90001-R](https://doi.org/10.1016/0364-5916%2893%2990001-R) | `224f9134223c5058fbfe63d4b8172fef06efb0f8790a7898c981ac5879a3a084` | [viewer](https://orchid-project.org/phase-diagrams/#CR-NB/CrNb-93Cos-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrNb-93Cos-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrNb-93Cos-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CrNb-09Pav.tdb | 1966.97 | C14_LAVES (x(Nb) 0.34391) + C15_LAVES (x(Nb) 0.35117) + LIQUID (x(Nb) 0.43665) |
| CrNb-09Pav.tdb | 1934.57 | C15_LAVES (x(Nb) 0.35976) + LIQUID (x(Nb) 0.48047) + BCC_A2 (x(Nb) 0.75003) |
| CrNb-09Pav.tdb | 1895.9 | BCC_A2 (x(Nb) 0.06852) + LIQUID (x(Nb) 0.17774) + C14_LAVES (x(Nb) 0.30518) |
| CrNb-09Pav.tdb | 1858.78 | BCC_A2 (x(Nb) 0.06271) + C15_LAVES (x(Nb) 0.30524) + C14_LAVES (x(Nb) 0.30545) |
| CrNb-14Sch.tdb | 1936.37 | C15_LAVES (x(Nb) 0.36655) + LIQUID (x(Nb) 0.50601) + BCC_A2 (x(Nb) 0.75577) |
| CrNb-14Sch.tdb | 1898.76 | BCC_A2 (x(Nb) 0.06242) + LIQUID (x(Nb) 0.17061) + C15_LAVES (x(Nb) 0.30459) |
| CrNb-15Lu.tdb | 1950.57 | C15_LAVES (x(Nb) 0.35355) + LIQUID (x(Nb) 0.47805) + BCC_A2 (x(Nb) 0.74988) |
| CrNb-15Lu.tdb | 1887.51 | BCC_A2 (x(Nb) 0.0627) + LIQUID (x(Nb) 0.17256) + C15_LAVES (x(Nb) 0.31266) |
| CrNb-16Pen.tdb | 1936.68 | C15_LAVES (x(Nb) 0.35872) + LIQUID (x(Nb) 0.49867) + BCC_A2 (x(Nb) 0.75123) |
| CrNb-16Pen.tdb | 1922.92 | BCC_A2 (x(Nb) 0.06411) + LIQUID (x(Nb) 0.16915) + C15_LAVES (x(Nb) 0.30375) |
| CrNb-17Laf.tdb | 1923.9 | C15_LAVES (x(Nb) 0.35949) + LIQUID (x(Nb) 0.52058) + BCC_A2 (x(Nb) 0.76789) |
| CrNb-17Laf.tdb | 1920.96 | BCC_A2 (x(Nb) 0.03102) + LIQUID (x(Nb) 0.16996) + C15_LAVES (x(Nb) 0.31843) |
| CrNb-18Jia.tdb | 1956.66 | C15_LAVES (x(Nb) 0.37475) + LIQUID (x(Nb) 0.49984) + BCC_A2 (x(Nb) 0.74896) |
| CrNb-18Jia.tdb | 1924.64 | BCC_A2 (x(Nb) 0.07081) + LIQUID (x(Nb) 0.17569) + C15_LAVES (x(Nb) 0.30898) |
| CrNb-93Cos-LB.tdb | 1924.49 | C14_LAVES (x(Nb) 0.34945) + LIQUID (x(Nb) 0.47601) + BCC_A2 (x(Nb) 0.74599) |
| CrNb-93Cos-LB.tdb | 1898.13 | C14_LAVES (x(Nb) 0.34894) + C15_LAVES (x(Nb) 0.35477) + BCC_A2 (x(Nb) 0.75713) |
| CrNb-93Cos-LB.tdb | 1892.65 | BCC_A2 (x(Nb) 0.06955) + LIQUID (x(Nb) 0.17962) + C14_LAVES (x(Nb) 0.2919) |
| CrNb-93Cos-LB.tdb | 1858.14 | BCC_A2 (x(Nb) 0.06434) + C15_LAVES (x(Nb) 0.29058) + C14_LAVES (x(Nb) 0.29288) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CR/CR-NB.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CR/CR-NB.json) · [CALPHAD hull CrNb-09Pav](https://data.orchid-project.org/hulls/calphad-sgte/CR/CR-NB--CrNb-09Pav.json) · [CALPHAD hull CrNb-14Sch](https://data.orchid-project.org/hulls/calphad-sgte/CR/CR-NB--CrNb-14Sch.json) · [CALPHAD hull CrNb-15Lu](https://data.orchid-project.org/hulls/calphad-sgte/CR/CR-NB--CrNb-15Lu.json) · [CALPHAD hull CrNb-16Pen](https://data.orchid-project.org/hulls/calphad-sgte/CR/CR-NB--CrNb-16Pen.json) · [CALPHAD hull CrNb-17Laf](https://data.orchid-project.org/hulls/calphad-sgte/CR/CR-NB--CrNb-17Laf.json) · [CALPHAD hull CrNb-93Cos-LB](https://data.orchid-project.org/hulls/calphad-sgte/CR/CR-NB--CrNb-93Cos-LB.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Cr–Nb system (10)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1983 | L = (Cr2Nb) + (Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 3, p. 2, row 4; `ORC-EVLIAQWNO7` |  |
| 1976 | L = (Cr2Nb) + (Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 3, p. 2, row 10; `ORC-AL3U6ROZ5K` |  |
| 1941 | L = (Cr) + (Cr2Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 3, p. 2, row 9; `ORC-27TUDBC67Q` |  |
| 1933 | L = (Cr) + (Cr2Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 3, p. 2, row 3; `ORC-JMRSMNIBQP` |  |
| 1933 | L = (Cr2Nb) + (Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 3, p. 2, row 2; `ORC-OT7J4EGYRR` |  |
| 1933 | L = (Cr2Nb) + (Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 3, p. 2, row 6; `ORC-YC6TL66HGS` |  |
| 1913 | L = (Cr) + (Cr2Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 3, p. 2, row 1; `ORC-KMNNNUXJHG` |  |
| 1903 | L = (Cr) + (Cr2Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 3, p. 2, row 7; `ORC-ERMJ5VJ3LH` |  |
| 1873 | L = (Cr) + (Cr2Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 3, p. 2, row 5; `ORC-VNOFIT5Y4E` |  |
| 1870 | L = (Cr2Nb) + (Nb) | (Cr2Nb): Nb 0.333333 | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 3, p. 2, row 8; `ORC-EEUA2TF3BY` |  |

## 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, Cr–Nb system (24)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| C15 Cr2Nb |  | -9.93 kJ/mol (basis unstated) | 0 | model |  |  | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 5, p. 6, row 1; `ORC-EPDYZSGRDL` |  |
| C15 Cr2Nb |  | -7.44 kJ/mol (basis unstated) | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Hong 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900005-3) | Table 5, p. 6, row 2; `ORC-BXYEEUODQA` |  |
| C15 Cr2Nb |  | -7.02 kJ/mol (basis unstated) | 0 | unspecified |  |  | [1] Schmetterer 2014; _cites Ormeci 1996_ [doi](https://doi.org/10.1103/physrevb.54.12753) | Table 5, p. 6, row 5; `ORC-7ZMMC6KJQ7` |  |
| C15 Cr2Nb |  | -6.93 kJ/mol (basis unstated) | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Yao 2006_ | Table 5, p. 6, row 3; `ORC-V5AAYX4LBW` |  |
| C15 Cr2Nb |  | -6.3 kJ/mol (basis unstated) | 0 | unspecified |  |  | [1] Schmetterer 2014; _cites Kellou 2005_ | Table 5, p. 6, row 4; `ORC-V6NAQQQR3Z` |  |
| Cr2:Cr |  | 26.4 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Sluiter 2006_ [doi](https://doi.org/10.1016/j.calphad.2006.09.002) | Table 6, p. 7, row 15; `ORC-UMDA26N3XS` |  |
| Cr2:Cr |  | 27.29 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 6, p. 7, row 14; `ORC-BKJI2BHPNQ` |  |
| Cr2:Cr |  | 30.56 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014 | Table 6, p. 7, row 12; `ORC-QSJGIAPGCT` |  |
| Cr2:Cr |  | 33.55 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014 | Table 6, p. 7, row 13; `ORC-KDA4DDUPS3` |  |
| Cr2:Nb |  | -3.31 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 6, p. 7, row 3; `ORC-KXIDPCR7GV` |  |
| Cr2:Nb |  | -2.48 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Hong 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900005-3) | Table 6, p. 7, row 5; `ORC-266DEJRAUQ` |  |
| Cr2:Nb |  | -2.34 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Ormeci 1996_ [doi](https://doi.org/10.1103/physrevb.54.12753) | Table 6, p. 7, row 8; `ORC-YXVPKEIW5Q` |  |
| Cr2:Nb |  | -2.31 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Yao 2006_ | Table 6, p. 7, row 6; `ORC-HKL3LLIZCU` |  |
| Cr2:Nb |  | -2.1 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Kellou 2005_ | Table 6, p. 7, row 7; `ORC-AAUZWQFL7N` |  |
| Cr2:Nb |  | -2.05 kJ/mol-atom | 0 | model |  |  | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 6, p. 7, row 4; `ORC-HVNJODFNW2` |  |
| Cr2:Nb |  | -1.83 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014 | Table 6, p. 7, row 1; `ORC-QPQBIQZ6MD` |  |
| Cr2:Nb |  | -1.72 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014 | Table 6, p. 7, row 2; `ORC-SIRFFSAVZR` |  |
| Cr2Nb C14 |  | -7 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [2] Pavlů 2009; _cites Martin 1970_ [doi](https://doi.org/10.1039/tf9706601065) | Table 4, p. 4, row 4; `ORC-YXXANJX5KK` |  |
| CrNb2 (C14) |  | 76.52 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Pavlů 2009 | Table 5, p. 4, row 1; `ORC-XLSY5U4PRY.969957` |  |
| CrNb2 (C15) |  | 75.33 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Pavlů 2009 | Table 5, p. 4, row 3; `ORC-MPJWFHXJ3F.28353c` |  |
| CrNb2 (C36) |  | 76.31 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Pavlů 2009 | Table 5, p. 4, row 5; `ORC-3OUP3LQ6BO.505957` |  |
| Nb2:Cr |  | 75.33 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 6, p. 7, row 11; `ORC-VSZ5OK5H4W` |  |
| Nb2:Cr |  | 75.38 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014 | Table 6, p. 7, row 9; `ORC-UD3OC5EVC7` |  |
| Nb2:Cr |  | 75.39 kJ/mol-atom | 0 | DFT |  |  | [1] Schmetterer 2014 | Table 6, p. 7, row 10; `ORC-O7W3UAOLTR` |  |

## Other properties

### Phase transition (74)

Table: Phase transition, Cr–Nb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1853 K | 1853 | polymorphic: NbCr₂ transf.; _alloy: Cr 0.66, Nb 0.34_ | experimental | [3] Neto 1993; _cites ref. 63Kor_ | Table 1, p. 3, row 14; `ORC-QKR5QEU3ZA` |  |
| Phase transition | 1863 K | 1863 | other; _alloy: Cr 0.7, Nb 0.3_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 12; `ORC-DLR3FQOUQ6` |  |
| Phase transition | 1873 K | 1873 | other; _alloy: Cr 0.75, Nb 0.25_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 11; `ORC-CFAQ3QXJTY` |  |
| Phase transition | 1873 K | 1873 | other; _alloy: Cr 0.85, Nb 0.15_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 7; `ORC-QRLTXZHQT7` |  |
| Phase transition | 1873 K | 1873 | other; _alloy: Cr 0.8, Nb 0.2_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 9; `ORC-ZONGOUTUKE` |  |
| Phase transition | 1875 K | 1875 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 61Gol_ | Table 1, p. 3, row 23; `ORC-BJEBWROAHT` |  |
| Phase transition | 1875 K | 1875 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 56Ely_ | Table 1, p. 3, row 51; `ORC-SIJRPRJVWY` |  |
| Phase transition | 1883 K | 1883 | other; _alloy: Cr 0.9, Nb 0.1_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 5; `ORC-YSFV3QPMQT` |  |
| Phase transition | 1893 K | 1893 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 61Gol_ | Table 1, p. 3, row 24; `ORC-3QIYTZJB5K` |  |
| Phase transition | 1913 K | 1913 | other: Cr-solidus; _alloy: Nb 0_ | experimental | [3] Neto 1993; _cites ref. 61Pan_ | Table 1, p. 3, row 27; `ORC-FEWRZ7IN3G` |  |
| Phase transition | 1915 K | 1915 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 61Pan_ | Table 1, p. 3, row 31; `ORC-7EP3CKFV5Y` |  |
| Phase transition | 1923 K | 1923 | other; _alloy: Cr 0.667, Nb 0.333_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 31; `ORC-7BIBG6WX7Z` |  |
| Phase transition | 1923 K | 1923 | other; _alloy: Cr 0.732, Nb 0.268_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 96; `ORC-GPOE3CXPCI` |  |
| Phase transition | 1923 K | 1923 | other; _alloy: Cr 0.55, Nb 0.45_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 15; `ORC-OTHDQE33ON` |  |
| Phase transition | 1927 K | 1927 | other; _alloy: Cr 0.668, Nb 0.332_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 101; `ORC-UDFJOFWH2K` |  |
| Phase transition | 1929 K | 1929 | other; _alloy: Cr 0.697, Nb 0.303_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 98; `ORC-4B3U2TRBK4` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.982, Nb 0.018_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 67; `ORC-4ATFIMAK3U` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.6, Nb 0.4_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 13; `ORC-6MM3NTH4TJ` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.93, Nb 0.07_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 72; `ORC-CYQLCVXM5W` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.843, Nb 0.157_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 91; `ORC-DKCVTLWYQ7` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.3, Nb 0.7_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 23; `ORC-E26F2MAKNI` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.901, Nb 0.099_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 74; `ORC-IT4AXUIRN5` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.4, Nb 0.6_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 20; `ORC-KGD6VUWL2V` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.836, Nb 0.164_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 76; `ORC-LSXVWP4Y4E` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.798, Nb 0.202_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 77; `ORC-NYN4OXD5MD` |  |
| Phase transition | 1933 K | 1933 | other; _alloy: Cr 0.5, Nb 0.5_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 17; `ORC-OQ77UPFSDQ` |  |
| Phase transition | 1934 K | 1934 | other; _alloy: Cr 0.77, Nb 0.23_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 94; `ORC-QWNZ3T4V23` |  |
| Phase transition | 1935 K | 1935 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 58Ere_ | Table 1, p. 3, row 39; `ORC-CSJEXQFSHP` |  |
| Phase transition | 1935 K | 1935 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 61Pan_ | Table 1, p. 3, row 30; `ORC-TJ7YKN5DXW` |  |
| Phase transition | 1935 K | 1935 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 56Ely_ | Table 1, p. 3, row 50; `ORC-VK6WDGXPMT` |  |
| Phase transition | 1935 K | 1935 | other; _alloy: Cr 0.879, Nb 0.121_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 89; `ORC-LANEFDHAKT` |  |
| Phase transition | 1941 K | 1941 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 69Rud_ | Table 1, p. 3, row 11; `ORC-BWLFU6TCCW` |  |
| Phase transition | 1943 K | 1943 | other; _alloy: Cr 0.2, Nb 0.8_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 25; `ORC-5QQLYFFXR4` |  |
| Phase transition | 1943 K | 1943 | other; _alloy: Cr 0.95, Nb 0.05_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 2; `ORC-JQT5TPWJ4D` |  |
| Phase transition | 1943 K | 1943 | other: Cr-solidus; _alloy: Nb 0_ | experimental | [3] Neto 1993; _cites ref. 56Ely_ | Table 1, p. 3, row 44; `ORC-CVK4MOP2QZ` |  |
| Phase transition | 1949 K | 1949 | other; _alloy: Cr 0.635, Nb 0.365_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 105; `ORC-COM6S6ER4B` |  |
| Phase transition | 1949 K | 1949 | other; _alloy: Cr 0.493, Nb 0.507_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 109; `ORC-H2EB6GKUNU` |  |
| Phase transition | 1949 K | 1949 | other; _alloy: Cr 0.567, Nb 0.433_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 107; `ORC-MQSH2USZET` |  |
| Phase transition | 1951 K | 1951 | other; _alloy: Cr 0.653, Nb 0.347_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 103; `ORC-OJQPHDIIRK` |  |
| Phase transition | 1953 K | 1953 | other; _alloy: Cr 0.957, Nb 0.043_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 70; `ORC-6AAFUKI67J` |  |
| Phase transition | 1953 K | 1953 | other; _alloy: Cr 0.991, Nb 0.009_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 65; `ORC-OODUF4KBE6` |  |
| Phase transition | 1953 K | 1953 | other; _alloy: Cr 0.736, Nb 0.264_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 82; `ORC-QAC2PCGGAW` |  |
| Phase transition | 1954 K | 1954 | other; _alloy: Cr 0.9, Nb 0.1_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 47; `ORC-Q63HMCL4AY` |  |
| Phase transition | 1956 K | 1956 | congruent transformation: NbCr₂ Melting | experimental | [3] Neto 1993; _cites ref. 56Ely_ | Table 1, p. 3, row 52; `ORC-HAZIK7JC5P` |  |
| Phase transition | 1958 K | 1958 | other; _alloy: Cr 0.7, Nb 0.3_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 58; `ORC-IS6QBA5M3S` |  |
| Phase transition | 1963 K | 1963 | other; _alloy: Cr 0.973, Nb 0.027_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 69; `ORC-34QL6RIMHA` |  |
| Phase transition | 1963 K | 1963 | other; _alloy: Cr 0.666, Nb 0.334_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 84; `ORC-XCOPKV4NUU` |  |
| Phase transition | 1972 K | 1972 | other; _alloy: Cr 0.4, Nb 0.6_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 50; `ORC-3DIIJAL3J2` |  |
| Phase transition | 1973 K | 1973 | other; _alloy: Cr 0.975, Nb 0.025_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 1; `ORC-WOAKCHDQL7` |  |
| Phase transition | 1973 K | 1973 | other: Cr-solidus; _alloy: Nb 0_ | experimental | [3] Neto 1993; _cites ref. 56Ely_ | Table 1, p. 3, row 45; `ORC-FGRK2Q6WFL` |  |
| Phase transition | 1975 K | 1975 | other; _alloy: Cr 0.63, Nb 0.37_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 63; `ORC-ZLJYBNOQG4` |  |
| Phase transition | 1976 K | 1976 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 69Rud_ | Table 1, p. 3, row 10; `ORC-Q43HVU5GAT` |  |
| Phase transition | 1983 K | 1983 | other; _alloy: Cr 0.3, Nb 0.7_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 52; `ORC-6NPJX2KNCO` |  |
| Phase transition | 1983 K | 1983 | other; _alloy: Cr 0.462, Nb 0.538_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 78; `ORC-J7QDS6ULZE` |  |
| Phase transition | 1983 K | 1983 | other; _alloy: Cr 0.597, Nb 0.403_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 85; `ORC-PBVWXNXYM5` |  |
| Phase transition | 1983 K | 1983 | other; _alloy: Cr 0.518, Nb 0.482_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 86; `ORC-WDBJBZ6SD6` |  |
| Phase transition | 1986 K | 1986 | congruent transformation: NbCr₂ Melting; _alloy: Cr 0.66, Nb 0.34_ | experimental | [3] Neto 1993; _cites ref. 58Ell_ | Table 1, p. 3, row 40; `ORC-P36KFOZHYC` |  |
| Phase transition | 1986 K | 1986 | eutectic: eutectic temp. | experimental | [3] Neto 1993; _cites ref. 58Ere_ | Table 1, p. 3, row 38; `ORC-QEEQ4SPURT` |  |
| Phase transition | 1993 K | 1993 | other; _alloy: Cr 0.05, Nb 0.95_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 29; `ORC-6B23XALQLI` |  |
| Phase transition | 1996 K | 1996 | congruent transformation: NbCr₂ Melting | experimental | [3] Neto 1993; _cites ref. 61Pan_ | Table 1, p. 3, row 34; `ORC-BHQ33FKH3X` |  |
| Phase transition | 2001 K | 2001 | congruent transformation | model | [3] Neto 1993 | p. 7; `ORC-5JW5GX2ENJ` | “The congruent melting temperature of the NbCrz phase was set to 2001 K.” |
| Phase transition | 2003 K | 2003 | congruent transformation: NbCr₂ Melting | experimental | [3] Neto 1993; _cites ref. 69Rud_ | Table 1, p. 3, row 12; `ORC-3ZTYT7JYOO` |  |
| Phase transition | 2003 K | 2003 | congruent transformation: NbCr₂ Melting; _alloy: Cr 0.66, Nb 0.34_ | experimental | [3] Neto 1993; _cites ref. 63Kor_ | Table 1, p. 3, row 13; `ORC-56GH4KS6IZ` |  |
| Phase transition | 2013 K | 2013 | other: Cr-solidus; _alloy: Nb 0_ | experimental | [3] Neto 1993; _cites ref. 61Pan_ | Table 1, p. 3, row 28; `ORC-SZUEVKPAHV` |  |
| Phase transition | 2016 K | 2016 | congruent transformation: NbCr₂ Melting; _alloy: Cr 0.66, Nb 0.34_ | experimental | [3] Neto 1993; _cites ref. 59Mis_ | Table 1, p. 3, row 35; `ORC-DIO4IRPT42` |  |
| Phase transition | 2027 K | 2027 | other; _alloy: Cr 0.942, Nb 0.058_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 87; `ORC-LR25Y4R7ZZ` |  |
| Phase transition | 2033 K | 2033 | other: Liquidus | experimental | [3] Neto 1993; _cites ref. 58Ere_ | Table 1, p. 3, row 36; `ORC-FIAUS7Q5FG` |  |
| Phase transition | 2043 K | 2043 | other: Cr-solidus; _alloy: Nb 0_ | experimental | [3] Neto 1993; _cites ref. 58Ere_ | Table 1, p. 3, row 37; `ORC-IRGHDAKOJP` |  |
| Phase transition | 2046 K | 2046 | congruent transformation: NbCr₂ Melting | experimental | [3] Neto 1993; _cites ref. 61Gol_ | Table 1, p. 3, row 25; `ORC-UYHRXYIA2N` |  |
| Phase transition | 2168 K | 2168 | other: Liquidus | experimental | [3] Neto 1993; _cites ref. 56Ely_ | Table 1, p. 3, row 42; `ORC-JITHXAAXA5` |  |
| Phase transition | 2179.5 K | 2179.5 | other: Liquidus | experimental | [3] Neto 1993; _cites ref. 56Ely_ | Table 1, p. 3, row 41; `ORC-BRJYHO4KVX` |  |
| Phase transition | 2183 K | 2183 | other; _alloy: Cr 0.2, Nb 0.8_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 54; `ORC-UVLRPYPXOW` |  |
| Phase transition | 2305.5 K | 2305.5 | other: Liquidus | experimental | [3] Neto 1993; _cites ref. 61Gol_ | Table 1, p. 3, row 18; `ORC-F26GFE3ALY` |  |
| Phase transition | 2373 K | 2373 | other; _alloy: Cr 0.1, Nb 0.9_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 56; `ORC-2IP3NRAXHK` |  |

### Phase equilibrium (77)

Table: Phase equilibrium, Cr–Nb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  | 1223 | Nb + C15 Cr2Nb + Cr + C15 Cr2Nb (Nb-rich side) + C15 Cr2Nb (Cr-rich side); _Nb: Cr 0.0944, Nb 0.9056; C15 Cr2Nb: Cr 0.6827, Nb 0.3173; Cr: Cr 0.9898, Nb 0.0102; C15 Cr2Nb (Nb-rich side): Cr 0.6357, Nb 0.3643; C15 Cr2Nb (Cr-rich side): Cr 0.6827, Nb 0.3173_ | model | [1] Schmetterer 2014; _cites Thoma 1992_ [doi](https://doi.org/10.1016/0921-5093%2892%2990420-6) | Table 2, p. 2, row 5; `ORC-AHP276X472` |  |
| Phase composition |  | 1273 | Nb + C15 Cr2Nb + Cr + C15 Cr2Nb (Nb-rich side) + C15 Cr2Nb (Cr-rich side); _Nb: Cr 0.04, Nb 0.96; C15 Cr2Nb: Cr 0.7, Nb 0.3; Cr: Cr 0.98, Nb 0.02; C15 Cr2Nb (Nb-rich side): Cr 0.64, Nb 0.36; C15 Cr2Nb (Cr-rich side): Cr 0.7, Nb 0.3_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 2, p. 2, row 11; `ORC-3YSYIKVCIU` |  |
| Phase composition |  | 1373 | Nb + C15 Cr2Nb + Cr + C15 Cr2Nb (Nb-rich side) + C15 Cr2Nb (Cr-rich side); _Nb: Cr 0.0902, Nb 0.9098; C15 Cr2Nb: Cr 0.6749, Nb 0.3251; Cr: Cr 0.9872, Nb 0.0128; C15 Cr2Nb (Nb-rich side): Cr 0.6573, Nb 0.3427; C15 Cr2Nb (Cr-rich side): Cr 0.6749, Nb 0.3251_ | model | [1] Schmetterer 2014; _cites Thoma 1992_ [doi](https://doi.org/10.1016/0921-5093%2892%2990420-6) | Table 2, p. 2, row 4; `ORC-SVU5TPFKNS` |  |
| Phase composition |  | 1473 | Nb + C15 Cr2Nb + Cr + C15 Cr2Nb (Nb-rich side) + C15 Cr2Nb (Cr-rich side); _Nb: Cr 0.091, Nb 0.909; C15 Cr2Nb: Cr 0.6779, Nb 0.3221; Cr: Cr 0.988, Nb 0.012; C15 Cr2Nb (Nb-rich side): Cr 0.645, Nb 0.355; C15 Cr2Nb (Cr-rich side): Cr 0.6779, Nb 0.3221_ | model | [1] Schmetterer 2014; _cites Thoma 1992_ [doi](https://doi.org/10.1016/0921-5093%2892%2990420-6) | Table 2, p. 2, row 3; `ORC-RIJFJ2JDFH` |  |
| Phase composition |  | 1573 | Nb + C15 Cr2Nb + Cr + C15 Cr2Nb (Nb-rich side) + C15 Cr2Nb (Cr-rich side); _Nb: Cr 0.1253, Nb 0.8747; C15 Cr2Nb: Cr 0.6795, Nb 0.3205; Cr: Cr 0.9851, Nb 0.0149; C15 Cr2Nb (Nb-rich side): Cr 0.6399, Nb 0.3601; C15 Cr2Nb (Cr-rich side): Cr 0.6795, Nb 0.3205_ | model | [1] Schmetterer 2014; _cites Thoma 1992_ [doi](https://doi.org/10.1016/0921-5093%2892%2990420-6) | Table 2, p. 2, row 2; `ORC-RNAVOG63YZ` |  |
| Phase composition |  | 1673 | Cr; _Cr: Cr 0.9686, Nb 0.0314_ | model | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 2, p. 2, row 9; `ORC-5FJT57YLCI` |  |
| Phase composition |  | 1673 | Nb + C15 Cr2Nb + Cr + C15 Cr2Nb (Nb-rich side) + C15 Cr2Nb (Cr-rich side); _Nb: Cr 0.1437, Nb 0.8563; C15 Cr2Nb: Cr 0.6804, Nb 0.3196; Cr: Cr 0.9754, Nb 0.0246; C15 Cr2Nb (Nb-rich side): Cr 0.6359, Nb 0.3641; C15 Cr2Nb (Cr-rich side): Cr 0.6804, Nb 0.3196_ | model | [1] Schmetterer 2014; _cites Thoma 1992_ [doi](https://doi.org/10.1016/0921-5093%2892%2990420-6) | Table 2, p. 2, row 1; `ORC-WQGZFFXH4L` |  |
| Phase composition |  | 1773 | Nb + Cr; _Nb: Cr 0.125, Nb 0.875; Cr: Cr 0.958, Nb 0.042_ | model | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 2, p. 2, row 8; `ORC-RZ6ZF3WGRV` |  |
| Phase composition |  | 1823 | Cr; _Cr: Cr 0.9375, Nb 0.0625_ | model | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 2, p. 2, row 7; `ORC-FR7YF6DHWX` |  |
| Phase composition |  | 1873 | Cr; _Cr: Cr 0.9, Nb 0.1_ | model | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 2, p. 2, row 6; `ORC-RKQBS7NJ5R` |  |
| Phase composition |  | 1887.4 | other; _liquid: Cr 0.456, Nb 0.544_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 35; `ORC-UFPRUW3T56` |  |
| Phase composition |  | 1905 | other; _liquid: Cr 0.496, Nb 0.504_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 46; `ORC-5ABVIMEZBK` |  |
| Phase composition |  | 1918 | other; _liquid: Cr 0.8, Nb 0.2_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 10; `ORC-FCZTF5KMW4` |  |
| Phase composition |  | 1925 | other; _liquid: Cr 0.807, Nb 0.193_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 93; `ORC-BHD2KQVSJQ` |  |
| Phase composition |  | 1927 | other; _liquid: Cr 0.887, Nb 0.113_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 34; `ORC-PN7VBU66X6` |  |
| Phase composition |  | 1933 | Nb; _Nb: Cr 0.2, Nb 0.8_ | model | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 2, p. 2, row 10; `ORC-5SCZYXY3VT` |  |
| Phase composition |  | 1934 | Nb + C15 Cr2Nb + Cr-rich liquid phase + C15 Cr2Nb (Nb-rich side) + C15 Cr2Nb (Cr-rich side) + Cr-rich liquid (a); _Nb: Cr 0.25, Nb 0.75; C15 Cr2Nb: Cr 0.68, Nb 0.32; Cr-rich liquid phase: Cr 0.78, Nb 0.22; C15 Cr2Nb (Nb-rich side): Cr 0.64, Nb 0.36; C15 Cr2Nb (Cr-rich side): Cr 0.68, Nb 0.32; Cr-rich liquid (a): Cr 0.78, Nb 0.22_ | model | [1] Schmetterer 2014; _cites Bhatt 2000_ [doi](https://doi.org/10.1016/s0925-8388%2800%2900678-2) | Table 2, p. 2, row 12; `ORC-SOJNSYKO5B` |  |
| Phase composition |  | 1938 | other; _liquid: Cr 0.667, Nb 0.333_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 32; `ORC-VB4DGSW66E` |  |
| Phase composition |  | 1948 | other; _liquid: Cr 0.93, Nb 0.07_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 73; `ORC-6AUP62YGR4` |  |
| Phase composition |  | 1948 | other; _liquid: Cr 0.6, Nb 0.4_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 14; `ORC-WTQWPYTNFS` |  |
| Phase composition |  | 1949 | other; _liquid: Cr 0.493, Nb 0.507_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 110; `ORC-NMRMBRUZMU` |  |
| Phase composition |  | 1958 | other; _liquid: Cr 0.5, Nb 0.5_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 18; `ORC-OEB4S3WAED` |  |
| Phase composition |  | 1962 | other; _liquid: Cr 0.77, Nb 0.23_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 95; `ORC-OYRGKR6HKS` |  |
| Phase composition |  | 1963 | other; _liquid: Cr 0.548, Nb 0.452_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 45; `ORC-QDA7Q5UDTH` |  |
| Phase composition |  | 1969.3 | other; _liquid: Cr 0.387, Nb 0.613_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 36; `ORC-RIYFZYEHOD` |  |
| Phase composition |  | 1973 | other; _liquid: Cr 0.55, Nb 0.45_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 16; `ORC-TTV7UDQVIM` |  |
| Phase composition |  | 1974 | other; _liquid: Cr 0.941, Nb 0.059_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 33; `ORC-FKMS3D5ZOE` |  |
| Phase composition |  | 1975 | other; _liquid: Cr 0.843, Nb 0.157_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 92; `ORC-7X5MMHPVG2` |  |
| Phase composition |  | 1978 | other; _liquid: Cr 0.736, Nb 0.264_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 83; `ORC-SAPAPQ2JL5` |  |
| Phase composition |  | 1983 | other; _liquid: Cr 0.85, Nb 0.15_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 8; `ORC-TTT6PCZ2PP` |  |
| Phase composition |  | 1986 | other; _liquid: Cr 0.9, Nb 0.1_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 48; `ORC-Q3OJMIMD7S` |  |
| Phase composition |  | 1988 | other; _liquid: Cr 0.63, Nb 0.37_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 64; `ORC-3VKYACOCKC` |  |
| Phase composition |  | 1990 | other; _liquid: Cr 0.732, Nb 0.268_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 97; `ORC-OST3UVCOKH` |  |
| Phase composition |  | 1990 | other; _liquid: Cr 0.567, Nb 0.433_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 108; `ORC-S4HYUKHEEB` |  |
| Phase composition |  | 1991 | other; _liquid: Cr 0.65, Nb 0.35_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 62; `ORC-JHZSGMV7SN` |  |
| Phase composition |  | 1991 | other; _liquid: Cr 0.7, Nb 0.3_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 59; `ORC-XET7SENMIB` |  |
| Phase composition |  | 1993 | other; _liquid: Cr 0.957, Nb 0.043_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 71; `ORC-BNFANVMNU7` |  |
| Phase composition |  | 1993 | other; _liquid: Cr 0.415, Nb 0.585_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 80; `ORC-UYM7N6IPD3` |  |
| Phase composition |  | 1995 | other; _liquid: Cr 0.67, Nb 0.33_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 61; `ORC-567Z5RPPCL` |  |
| Phase composition |  | 1997 | other; _liquid: Cr 0.68, Nb 0.32_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 60; `ORC-D6PLLIT5JX` |  |
| Phase composition |  | 2002 | other; _liquid: Cr 0.4, Nb 0.6_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 51; `ORC-3JZP6JRFLQ` |  |
| Phase composition |  | 2002 | other; _liquid: Cr 0.879, Nb 0.121_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 90; `ORC-7CX7FRFAA2` |  |
| Phase composition |  | 2003 | other; _liquid: Cr 0.45, Nb 0.55_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 19; `ORC-7HSCQERH3O` |  |
| Phase composition |  | 2003 | other; _liquid: Cr 0.697, Nb 0.303_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 99; `ORC-V3YEKG6UQX` |  |
| Phase composition |  | 2005 | other; _liquid: Cr 0.675, Nb 0.325_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 100; `ORC-XZ4HR27IW5` |  |
| Phase composition |  | 2007 | other; _liquid: Cr 0.668, Nb 0.332_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 102; `ORC-E2LGH3HG36` |  |
| Phase composition |  | 2010 | other; _liquid: Cr 0.635, Nb 0.365_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 106; `ORC-MRODRLRF52` |  |
| Phase composition |  | 2011 | other; _liquid: Cr 0.653, Nb 0.347_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 104; `ORC-SYALZUBPEQ` |  |
| Phase composition |  | 2013 | other; _liquid: Cr 0.593, Nb 0.407_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 44; `ORC-JVYL2K6ELT` |  |
| Phase composition |  | 2013.3 | other; _liquid: Cr 0.337, Nb 0.663_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 37; `ORC-STKJOBGVGM` |  |
| Phase composition |  | 2018 | other; _liquid: Cr 0.792, Nb 0.208_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 42; `ORC-XUKB6W3RDL` |  |
| Phase composition |  | 2030.5 | other: Cr-liquidus; _liquid: Nb 0_ | experimental | [3] Neto 1993; _cites ref. 61Pan_ | Table 1, p. 3, row 26; `ORC-6O7VOCX724` |  |
| Phase composition |  | 2033 | other; _liquid: Cr 0.9, Nb 0.1_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 6; `ORC-IWOOFAUL5V` |  |
| Phase composition |  | 2033 | other; _liquid: Cr 0.462, Nb 0.538_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 79; `ORC-K5Q72CONE5` |  |
| Phase composition |  | 2042 | other; _liquid: Cr 0.85, Nb 0.15_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 49; `ORC-U4CTHKP67C` |  |
| Phase composition |  | 2043 | other; _liquid: Cr 0.982, Nb 0.018_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 68; `ORC-4P7LNWFC36` |  |
| Phase composition |  | 2043 | other; _liquid: Cr 0.901, Nb 0.099_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 75; `ORC-CABFYTXYTN` |  |
| Phase composition |  | 2047 | other; _liquid: Cr 0.665, Nb 0.335_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 43; `ORC-AN5K7HGE53` |  |
| Phase composition |  | 2048 | other; _liquid: Cr 0.4, Nb 0.6_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 21; `ORC-7YIHJ3AIXY` |  |
| Phase composition |  | 2061 | other; _liquid: Cr 0.3, Nb 0.7_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 53; `ORC-ZDVAGP3QIO` |  |
| Phase composition |  | 2063 | other; _liquid: Cr 0.925, Nb 0.075_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 4; `ORC-4F4Y2BT2FK` |  |
| Phase composition |  | 2073 | other; _liquid: Cr 0.991, Nb 0.009_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 66; `ORC-IA7W52OBI5` |  |
| Phase composition |  | 2079 | other; _liquid: Cr 0.942, Nb 0.058_ | experimental | [1] Schmetterer 2014; _cites Pan 1961_ | Table 4, p. 5, row 88; `ORC-FBPUFWAFOD` |  |
| Phase composition |  | 2093 | other; _liquid: Cr 0.35, Nb 0.65_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 22; `ORC-MJIO3RRQ73` |  |
| Phase composition |  | 2103 | other; _liquid: Cr 0.95, Nb 0.05_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 3; `ORC-6XK3IB3VBL` |  |
| Phase composition |  | 2108 | other; _liquid: Cr 0.3, Nb 0.7_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 24; `ORC-AHAPCSC6RB` |  |
| Phase composition |  | 2127.5 | other; _liquid: Cr 0.196, Nb 0.804_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 38; `ORC-DHEHASHCS7` |  |
| Phase composition |  | 2133 | other; _liquid: Cr 0.341, Nb 0.659_ | experimental | [1] Schmetterer 2014; _cites Eremenko 1958_ | Table 4, p. 5, row 81; `ORC-CFD3H5YFRT` |  |
| Phase composition |  | 2168.5 | other; _liquid: Cr 0.158, Nb 0.842_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 39; `ORC-VHDI5VC7SO` |  |
| Phase composition |  | 2173 | other; _liquid: Cr 0.2, Nb 0.8_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 26; `ORC-LQE32HDGQ5` |  |
| Phase composition |  | 2223 | other; _liquid: Cr 0.15, Nb 0.85_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 27; `ORC-UQKXGPN5ME` |  |
| Phase composition |  | 2313 | other; _liquid: Cr 0.1, Nb 0.9_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 28; `ORC-BNH35KKR26` |  |
| Phase composition |  | 2323.3 | other; _liquid: Cr 0.096, Nb 0.904_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 40; `ORC-L4MPEUHOG3` |  |
| Phase composition |  | 2333 | other; _liquid: Cr 0.05, Nb 0.95_ | experimental | [1] Schmetterer 2014; _cites Elyutin 1956_ | Table 4, p. 5, row 30; `ORC-TRTIO7UEHK` |  |
| Phase composition |  | 2372 | other; _liquid: Cr 0.2, Nb 0.8_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 55; `ORC-6DVTHR2FCH` |  |
| Phase composition |  | 2521.9 | other; _liquid: Cr 0.045, Nb 0.955_ | experimental | [1] Schmetterer 2014; _cites Goldschmidt 1961_ [doi](https://doi.org/10.1016/0022-5088%2861%2990042-x) | Table 4, p. 5, row 41; `ORC-QHKW2WCUSJ` |  |
| Phase composition |  | 2630 | other; _liquid: Cr 0.1, Nb 0.9_ | experimental | [1] Schmetterer 2014; _cites Rudy 1969_ | Table 4, p. 5, row 57; `ORC-64QQM7VLLV` |  |

### Formation (1)

Table: Formation, Cr–Nb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: ΔfS_ | -0.5 unknown ± 0.6 | 298.15 | C15 Cr2Nb; _alloy: Cr 0.667, Nb 0.333_ | experimental | [1] Schmetterer 2014; _cites Martin 1970_ [doi](https://doi.org/10.1039/tf9706601065) | Table 5, p. 6, row 9; `ORC-C3PXRTTA6V.116921` |  |

### Heat capacity / entropy / enthalpy (1)

Table: Heat capacity / entropy / enthalpy, Cr–Nb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Heat capacity; _printed: Cp_ | 72.59 J/mol (basis unstated)/K | 298.15 | C15 Cr2Nb; _alloy: Cr 0.667, Nb 0.333_ | experimental | [1] Schmetterer 2014; _cites Martin 1970_ [doi](https://doi.org/10.1039/tf9706601065) | Table 5, p. 6, row 8; `ORC-IMPRO7LAHD` |  |

### Activity / EMF / Gibbs energy (2)

Table: Activity / EMF / Gibbs energy, Cr–Nb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Activity Cr; _printed: Activity of Cr_ | 0.42 1 | 1472 | C15 Cr2Nb + (Nb); _alloy: Cr 0.47, Nb 0.53_ | experimental | [1] Schmetterer 2014; _cites Martin 1970_ [doi](https://doi.org/10.1039/tf9706601065) | Table 5, p. 6, row 7; `ORC-GQNFWJEWL3.30af1a` |  |
| Activity Cr; _printed: Activity of Cr_ | 0.41 1 | 1472 | C15 Cr2Nb + (Nb); _alloy: Cr 0.3, Nb 0.7_ | experimental | [1] Schmetterer 2014; _cites Martin 1970_ [doi](https://doi.org/10.1039/tf9706601065) | Table 5, p. 6, row 6; `ORC-ZKE56KTRWC.f9b1d8` |  |

### Crystal structure (15)

Table: Crystal structure, Cr–Nb system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a; _printed: a_ | 6.93 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 6, p. 7, row 3; `ORC-25M3TMYBEG` |  |
| Lattice a; _printed: a_ | 6.94 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014; _cites Kellou 2005_ | Table 6, p. 7, row 7; `ORC-2JZQSI77LM` |  |
| Lattice a; _printed: a_ | 6.66 Å | 0 | UNKNOWN; _alloy: Nb 0_ | DFT | [1] Schmetterer 2014 | Table 6, p. 7, row 13; `ORC-JCUKNZFHFF` |  |
| Lattice a; _printed: a_ | 7.51 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014 | Table 6, p. 7, row 9; `ORC-LO7WFY3J5N` |  |
| Lattice a; _printed: a_ | 6.93 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014; _cites Yao 2006_ | Table 6, p. 7, row 6; `ORC-MBV7ZJ4KXM` |  |
| Lattice a; _printed: a_ | 6.82 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014; _cites Hong 1999_ [doi](https://doi.org/10.1016/s0966-9795%2898%2900005-3) | Table 6, p. 7, row 5; `ORC-N766V2OZVN` |  |
| Lattice a; _printed: a_ | 6.58 Å | 0 | UNKNOWN; _alloy: Nb 0_ | DFT | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 6, p. 7, row 14; `ORC-RMQQ6AWWFB` |  |
| Lattice a; _printed: a_ | 7.5 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014 | Table 6, p. 7, row 10; `ORC-SZ4SL7DIP7` |  |
| Lattice a; _printed: a_ | 6.93 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014 | Table 6, p. 7, row 2; `ORC-UEIQ5PUQW2` |  |
| Lattice a; _printed: a_ | 6.64 Å | 0 | UNKNOWN; _alloy: Nb 0_ | DFT | [1] Schmetterer 2014 | Table 6, p. 7, row 12; `ORC-UPRRZEZ5RG` |  |
| Lattice a; _printed: a_ | 6.96 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014 | Table 6, p. 7, row 1; `ORC-YC7TC246CJ` |  |
| Lattice a; _printed: a_ | 7.5 Å | 0 | UNKNOWN | DFT | [1] Schmetterer 2014; _cites Pavlu 2009_ [doi](https://doi.org/10.1016/j.calphad.2008.04.006) | Table 6, p. 7, row 11; `ORC-YSVRFXURCU` |  |
| Lattice a | 3.3 Å | 298.15 | (Nb); _(Nb): Cr 0.244, Nb 0.756_ | unspecified | [1] Schmetterer 2014; _cites Straumanis 2014_ | Table 1, p. 2, row 4; `ORC-WJKDDP7SWN` |  |
| Lattice a | 6.991 Å | 298.15 | Cr2Nb LT; _Cr2Nb LT: Cr 0.7, Nb 0.3_ | experimental | [1] Schmetterer 2014; _cites Blazina 1986_ | Table 1, p. 2, row 2; `ORC-WO3CKPLMNK` |  |
| Lattice a | 2.91 Å | 1353 | (Cr); _(Cr): Cr 0.944, Nb 0.056_ | unspecified | [1] Schmetterer 2014 | Table 1, p. 2, row 1; `ORC-44XSLZ7VTR` |  |

## Sources

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

1. Clemens Schmetterer, Alexandra Khvan, Aurélie Jacob, Bengt Hallstedt, Torsten Markus, A New Theoretical Study of the Cr-Nb System, J. Phase Equilib. Diffus. 35, 434-444 (2014). [doi:10.1007/s11669-014-0313-y](https://doi.org/10.1007/s11669-014-0313-y)
2. J. Pavlů, J. Vřešt’ál, M. Šob, Re-modeling of Laves phases in the Cr–Nb and Cr–Ta systems using first-principles results, Calphad 33, 179-186 (2009). [doi:10.1016/j.calphad.2008.04.006](https://doi.org/10.1016/j.calphad.2008.04.006)
3. Joaquim G. Costa Neto, Suzana G. Fries, Hans Leo Lukas, Sérgio Gama, Günter Effenberg, Thermodynamic optimisation of the Nb-Cr system, Calphad 17, 219-228 (1993). [doi:10.1016/0364-5916(93)90001-r](https://doi.org/10.1016/0364-5916%2893%2990001-r)

## 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/).