# Sc–Si system

> Sc–Si system: 57 accepted literature values (crystal structure 31, invariant reaction 14, formation 12) and 2 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

57 accepted literature values from 1 paper(s) (experimental 45, model 12); 2 calculated phase diagram(s).

Data: [JSON](https://data.orchid-project.org/literature/systems/SC-SI.json) · [CSV](https://data.orchid-project.org/systems/SC-SI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#SC-SI) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#SC-SI/ScSi-08GTT.json) · [phases (10)](https://data.orchid-project.org/phases/pages/SC-SI.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/SC-SI.html) · [Markdown](https://data.orchid-project.org/systems/SC-SI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 45 |
| model | 12 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 14 |
| formation | 12 |
| crystal structure | 31 |

## 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 |
|---|---|---|---|
| ScSi-08GTT.tdb | GTT, unpublished, 2008. | `39f96fbdf0474901452e7df8d5a86068f56bdd6b52445e3951fdf7b4da5d9f33` | [viewer](https://orchid-project.org/phase-diagrams/#SC-SI/ScSi-08GTT.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/ScSi-08GTT.json) |
| ScSi-15Qin.tdb | A. Qin, D. Liu, C. Chen, S. Liu, Y. Du, M. Wang, P. Nash, J. Thermal Analysis Calorim., 119, 1315-21(2015). [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) | `e29b1390094334c403d0e8446dcef984869b8038d410ecc2cecba790547f15e6` | [viewer](https://orchid-project.org/phase-diagrams/#SC-SI/ScSi-15Qin.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/ScSi-15Qin.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| ScSi-08GTT.tdb | 2056.92 | SC5SI3_D88 (x(Si) 0.375) + SCSI_B33 (x(Si) 0.5) + LIQUID (x(Si) 0.52796) |
| ScSi-08GTT.tdb | 2056.92 | SC5SI3_D88 (x(Si) 0.375) + SCSI_B33 (x(Si) 0.5) + LIQUID (x(Si) 0.52799) |
| ScSi-08GTT.tdb | 2056.92 | SC5SI3_D88 (x(Si) 0.375) + SCSI_B33 (x(Si) 0.5) + LIQUID (x(Si) 0.52777) |
| ScSi-08GTT.tdb | 1607.95 | HCP_A3 (x(Si) 2.000e-5) + BCC_A2 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.0888) |
| ScSi-08GTT.tdb | 1607.95 | HCP_A3 (x(Si) 2.000e-5) + BCC_A2 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.08874) |
| ScSi-08GTT.tdb | 1607.95 | HCP_A3 (x(Si) 2.000e-5) + BCC_A2 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.08876) |
| ScSi-08GTT.tdb | 1545.13 | HCP_A3 (x(Si) 2.000e-5) + LIQUID (x(Si) 0.11708) + SC5SI3_D88 (x(Si) 0.375) |
| ScSi-08GTT.tdb | 1545.13 | HCP_A3 (x(Si) 2.000e-5) + LIQUID (x(Si) 0.11711) + SC5SI3_D88 (x(Si) 0.375) |
| ScSi-08GTT.tdb | 1534.9 | SCSI_B33 (x(Si) 0.5) + SC2SI3_C32 (x(Si) 0.6) + LIQUID (x(Si) 0.72234) |
| ScSi-08GTT.tdb | 1534.9 | SCSI_B33 (x(Si) 0.5) + SC2SI3_C32 (x(Si) 0.6) + LIQUID (x(Si) 0.72243) |
| ScSi-08GTT.tdb | 1534.9 | SCSI_B33 (x(Si) 0.5) + SC2SI3_C32 (x(Si) 0.6) + LIQUID (x(Si) 0.72245) |
| ScSi-08GTT.tdb | 1426.82 | SC2SI3_C32 (x(Si) 0.6) + LIQUID (x(Si) 0.76109) + DIAMOND_A4 (x(Si) 1) |
| ScSi-08GTT.tdb | 1426.82 | SC2SI3_C32 (x(Si) 0.6) + LIQUID (x(Si) 0.76126) + DIAMOND_A4 (x(Si) 1) |
| ScSi-08GTT.tdb | 1196.56 | SCSI_B33 (x(Si) 0.5) + SC2SI3_C32 (x(Si) 0.6) + DIAMOND_A4 (x(Si) 1) |
| ScSi-15Qin.tdb | 2056.85 | SC5SI3_D88 (x(Si) 0.375) + SCSI_B33 (x(Si) 0.5) + LIQUID (x(Si) 0.50453) |
| ScSi-15Qin.tdb | 2056.85 | SC5SI3_D88 (x(Si) 0.375) + SCSI_B33 (x(Si) 0.5) + LIQUID (x(Si) 0.50429) |
| ScSi-15Qin.tdb | 1607.99 | BCC_A2 (x(Si) 0) + HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.08197) |
| ScSi-15Qin.tdb | 1607.99 | HCP_A3 (x(Si) 0) + BCC_A2 (x(Si) 0) + LIQUID (x(Si) 0.08184) |
| ScSi-15Qin.tdb | 1547.17 | HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.10085) + SC5SI3_D88 (x(Si) 0.375) |
| ScSi-15Qin.tdb | 1547.17 | HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.10088) + SC5SI3_D88 (x(Si) 0.375) |
| ScSi-15Qin.tdb | 1536.12 | SCSI_B33 (x(Si) 0.5) + BETA_SC3SI5 (x(Si) 0.625) + LIQUID (x(Si) 0.71112) |
| ScSi-15Qin.tdb | 1536.12 | SCSI_B33 (x(Si) 0.5) + BETA_SC3SI5 (x(Si) 0.625) + LIQUID (x(Si) 0.71124) |
| ScSi-15Qin.tdb | 1424.57 | BETA_SC3SI5 (x(Si) 0.625) + LIQUID (x(Si) 0.76085) + DIAMOND_A4 (x(Si) 1) |
| ScSi-15Qin.tdb | 1424.57 | BETA_SC3SI5 (x(Si) 0.625) + LIQUID (x(Si) 0.76096) + DIAMOND_A4 (x(Si) 1) |
| ScSi-15Qin.tdb | 1342.73 | BETA_SC3SI5 (x(Si) 0.625) + ALPHA_SC3SI5_C32 (x(Si) 0.625) + DIAMOND_A4 (x(Si) 1) |
| ScSi-15Qin.tdb | 1342.73 | SCSI_B33 (x(Si) 0.5) + BETA_SC3SI5 (x(Si) 0.625) + ALPHA_SC3SI5_C32 (x(Si) 0.625) |
| ScSi-15Qin.tdb | 1198.66 | SCSI_B33 (x(Si) 0.5) + ALPHA_SC3SI5_C32 (x(Si) 0.625) + DIAMOND_A4 (x(Si) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/SC/SC-SI.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/SC/SC-SI.json) · [CALPHAD hull ScSi-08GTT](https://data.orchid-project.org/hulls/calphad-sgte/SC/SC-SI--ScSi-08GTT.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Sc–Si system (14)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 2333.15 | congruent melting: L -> Sc5Si3 | L: Si 0.375; Sc5Si3: Si 0.375 | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 4, p. 5, row 13; `ORC-BF4OWCWJ5X` |  |
| 2330.15 | congruent melting: L -> Sc5Si3 | L: Si 0.375; Sc5Si3: Si 0.375 | model | [1] Qin 2015 | Table 4, p. 5, row 14; `ORC-IHBPNX6LXO` |  |
| 2058.15 | L + Sc5Si3 -> ScSi | Sc5Si3: Si 0.375; ScSi: Si 0.5 | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 4, p. 5, row 3; `ORC-WYKTNDZZAU` |  |
| 2057.15 | L + Sc5Si3 -> ScSi | L: Si 0.5045; Sc5Si3: Si 0.375; ScSi: Si 0.5 | model | [1] Qin 2015 | Table 4, p. 5, row 4; `ORC-MPG4EF34BE` |  |
| 1548.15 | eutectic: L -> (αSc) + Sc5Si3 | L: Si 0.12; (αSc): Si 0; Sc5Si3: Si 0.375 | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 4, p. 5, row 1; `ORC-R7L6SCZX4M` |  |
| 1547.15 | eutectic: L -> (αSc) + Sc5Si3 | L: Si 0.101; (αSc): Si 0; Sc5Si3: Si 0.375 | model | [1] Qin 2015 | Table 4, p. 5, row 2; `ORC-R2M4T4OZ7J` |  |
| 1536.15 | L + ScSi -> βSc3Si5 | L: Si 0.711; ScSi: Si 0.5; βSc3Si5: Si 0.625 | model | [1] Qin 2015 | Table 4, p. 5, row 6; `ORC-2GKXU2UQB4` |  |
| 1533.15 | L + ScSi -> βSc3Si5 | ScSi: Si 0.5; βSc3Si5: Si 0.6 | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 4, p. 5, row 5; `ORC-YMSQ23JBYN` |  |
| 1428.15 | eutectic: L -> (βSc3Si5) + (Si) | L: Si 0.77; (βSc3Si5): Si 0.6; (Si): Si 1 | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 4, p. 5, row 7; `ORC-AXBNWQ4KUA` |  |
| 1424.15 | eutectic: L -> (βSc3Si5) + (Si) | L: Si 0.761; (βSc3Si5): Si 0.625; (Si): Si 1 | model | [1] Qin 2015 | Table 4, p. 5, row 8; `ORC-SO32SN4QWM` |  |
| 1343.15 | polymorphic: βSc3Si5 -> αSc3Si5 | βSc3Si5: Si 0.625; αSc3Si5: Si 0.625 | model | [1] Qin 2015 | Table 4, p. 5, row 12; `ORC-JM2E2PIIN3` |  |
| 1343.15 | polymorphic: βSc3Si5 -> αSc3Si5 | βSc3Si5: Si 0.6; αSc3Si5: Si 0.6 | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 4, p. 5, row 11; `ORC-KQBB62IPBY` |  |
| 1199.15 | αSc3Si5 -> ScSi + (Si) | αSc3Si5: Si 0.625; ScSi: Si 0.5; (Si): Si 1 | model | [1] Qin 2015 | Table 4, p. 5, row 10; `ORC-PDTNDEOHYF` |  |
| 1198.15 | αSc3Si5 -> ScSi + (Si) | αSc3Si5: Si 0.6; ScSi: Si 0.5; (Si): Si 1 | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 4, p. 5, row 9; `ORC-I5I6DC2SDZ` |  |

## 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, Sc–Si system (12)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Sc5Si3 | [Sc5Si3](https://data.orchid-project.org/compounds/Sc5Si3.html) | -161.1 kJ/mol-atom | 298.15 | experimental | -71.535 (mp-aaaaalow) | -74.229 (oqmd-4475) | [1] Qin 2015; _cites Golutvin 1984_ | Table 2, p. 3, row 1; `ORC-SB22WLDX3O.343415` |  |
| Sc5Si3 | [Sc5Si3](https://data.orchid-project.org/compounds/Sc5Si3.html) | -102.8 kJ/mol-atom ± 3.8 | 935 | experimental | -71.535 (mp-aaaaalow) | -74.229 (oqmd-4475) | [1] Qin 2015; _cites Lukashenko 1992_ [doi](https://doi.org/10.1016/0925-8388%2892%2990229-3) | Table 2, p. 3, row 3; `ORC-GZV46W4OLK.30aa86` |  |
| Sc5Si3 | [Sc5Si3](https://data.orchid-project.org/compounds/Sc5Si3.html) | -90.3 kJ/mol-atom | 298.15 | model | -71.535 (mp-aaaaalow) | -74.229 (oqmd-4475) | [1] Qin 2015 | Table 2, p. 3, row 7; `ORC-A4XBUGH2M5.4b4a26` |  |
| Sc5Si3 | [Sc5Si3](https://data.orchid-project.org/compounds/Sc5Si3.html) | -89.9 kJ/mol-atom ± 4.3 | 298.15 | experimental | -71.535 (mp-aaaaalow) | -74.229 (oqmd-4475) | [1] Qin 2015; _cites Topor 1989_ [doi](https://doi.org/10.1007/bf02670193) | Table 2, p. 3, row 2; `ORC-2OWPACNVAE` |  |
| Sc5Si3 | [Sc5Si3](https://data.orchid-project.org/compounds/Sc5Si3.html) | 4.236 kJ/mol-atom | 298.15 | model | -71.535 (mp-aaaaalow) | -74.229 (oqmd-4475) | [1] Qin 2015; _cites Sychev 1980_ | Table 2, p. 3, row 6; `ORC-5UUHBBHP6L` |  |
| ScSi | [ScSi](https://data.orchid-project.org/compounds/ScSi.html) | -117.2 kJ/mol-atom | 298.15 | experimental | -77.326 (mp-aaaaaotl) | -80.839 (oqmd-7936) | [1] Qin 2015; _cites Golutvin 1984_ | Table 2, p. 3, row 1; `ORC-SB22WLDX3O.1df120` |  |
| ScSi | [ScSi](https://data.orchid-project.org/compounds/ScSi.html) | -87.21 kJ/mol-atom ± 2.1 | 935 | experimental | -77.326 (mp-aaaaaotl) | -80.839 (oqmd-7936) | [1] Qin 2015; _cites Lukashenko 1992_ [doi](https://doi.org/10.1016/0925-8388%2892%2990229-3) | Table 2, p. 3, row 3; `ORC-GZV46W4OLK.6592b0` |  |
| ScSi | [ScSi](https://data.orchid-project.org/compounds/ScSi.html) | -82.3 kJ/mol-atom ± 2.1 | 298.15 | experimental | -77.326 (mp-aaaaaotl) | -80.839 (oqmd-7936) | [1] Qin 2015; _cites Meschel 1998_ [doi](https://doi.org/10.1016/s0925-8388%2897%2900528-8) | Table 2, p. 3, row 4; `ORC-C74MOBFIIP` |  |
| ScSi | [ScSi](https://data.orchid-project.org/compounds/ScSi.html) | -81.2 kJ/mol-atom | 298.15 | model | -77.326 (mp-aaaaaotl) | -80.839 (oqmd-7936) | [1] Qin 2015 | Table 2, p. 3, row 7; `ORC-A4XBUGH2M5.d499f5` |  |
| ScSi | [ScSi](https://data.orchid-project.org/compounds/ScSi.html) | -80 kJ/mol-atom | 0 | model | -77.326 (mp-aaaaaotl) | -80.839 (oqmd-7936) | [1] Qin 2015; _cites Niessen 1981_ | Table 2, p. 3, row 5; `ORC-FFJ6YZODND` |  |
| αSc3Si5 |  | -71.2 kJ/mol-atom | 298.15 | experimental |  |  | [1] Qin 2015; _cites Golutvin 1984_ | Table 2, p. 3, row 1; `ORC-SB22WLDX3O.c0fe37` |  |
| αSc3Si5 |  | -60.9 kJ/mol-atom | 298.15 | model |  |  | [1] Qin 2015 | Table 2, p. 3, row 7; `ORC-A4XBUGH2M5.bd8f2b` |  |

## Other properties

### Crystal structure (31)

Table: Crystal structure, Sc–Si system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 3.3088 Å | 298.15 | (αSc); _alloy: Si 0_ | experimental | [1] Qin 2015; _cites King 1981_ | Table 1, p. 2, row 2; `ORC-W2XQWDOBRJ.b75228` |  |
| Lattice a | 3.73 Å | 298.15 | (βSc); _alloy: Si 0_ | experimental | [1] Qin 2015; _cites Massalski 1986_ | Table 1, p. 2, row 3; `ORC-CKSI2G6J3J` |  |
| Lattice a | 7.845 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Sychev 1980_ | Table 1, p. 2, row 7; `ORC-C5AWJIH4E3.0f3914` |  |
| Lattice a | 7.861 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites McColm 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990517-0) | Table 1, p. 2, row 8; `ORC-GJ5VRCK3ZF.a1e609` |  |
| Lattice a | 7.86 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Lazorenko 1974_ | Table 1, p. 2, row 6; `ORC-KYNARDNMFZ.279093` |  |
| Lattice a | 7.85 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 1, p. 2, row 4; `ORC-QCCFEUJQAI.543458` |  |
| Lattice a | 7.861 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Arbuckle 1962_ [doi](https://doi.org/10.1107/s0365110x62003217) | Table 1, p. 2, row 5; `ORC-ZJ3EMB6AIP.52f7a2` |  |
| Lattice a | 3.99 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 1, p. 2, row 9; `ORC-64HIZQWHKB.2ea162` |  |
| Lattice a | 3.99 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Dvorina 1965_ | Table 1, p. 2, row 10; `ORC-E5NIVP3YBJ.64d7ac` |  |
| Lattice a | 3.99 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Lazorenko 1974_ | Table 1, p. 2, row 12; `ORC-EVRNH7D5OY.7c493e` |  |
| Lattice a | 0.3988 not_printed | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Schob 1965_ [doi](https://doi.org/10.1107/s0365110x65003134) | Table 1, p. 2, row 11; `ORC-SKUDVBH6RX.64a1e3` |  |
| Lattice a | 3.664 Å | 298.15 | αSc2Si3; _alloy: Si 0.6_ | experimental | [1] Qin 2015; _cites Schob 1964_ [doi](https://doi.org/10.1007/bf00901700) | Table 1, p. 2, row 13; `ORC-COKFFI7PUI.e7d646` |  |
| Lattice a | 3.66 Å | 298.15 | αSc3Si5; _alloy: Si 0.625_ | experimental | [1] Qin 2015; _cites Lazorenko 1974_ | Table 1, p. 2, row 15; `ORC-NCCVUC3ZVJ.bf5f6b` |  |
| Lattice a | 0.366 not_printed ± 0.001 | 298.15 | αSc3Si5; _alloy: Si 0.625_ | experimental | [1] Qin 2015; _cites Gladyshevskii 1963_ | Table 1, p. 2, row 14; `ORC-SQR4YSJ64Y.a0fa06` |  |
| Lattice b | 9.87 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 1, p. 2, row 9; `ORC-64HIZQWHKB.37ead6` |  |
| Lattice b | 9.86 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Dvorina 1965_ | Table 1, p. 2, row 10; `ORC-E5NIVP3YBJ.ab5d8f` |  |
| Lattice b | 9.86 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Lazorenko 1974_ | Table 1, p. 2, row 12; `ORC-EVRNH7D5OY.6a50fd` |  |
| Lattice b | 0.9882 not_printed ± 5.000e-4 | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Schob 1965_ [doi](https://doi.org/10.1107/s0365110x65003134) | Table 1, p. 2, row 11; `ORC-SKUDVBH6RX.b20e55` |  |
| Lattice c | 5.268 Å | 298.15 | (αSc); _alloy: Si 0_ | experimental | [1] Qin 2015; _cites King 1981_ | Table 1, p. 2, row 2; `ORC-W2XQWDOBRJ.ce3d5e` |  |
| Lattice c | 5.786 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Sychev 1980_ | Table 1, p. 2, row 7; `ORC-C5AWJIH4E3.efdb74` |  |
| Lattice c | 5.814 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites McColm 1987_ [doi](https://doi.org/10.1016/0022-5088%2887%2990517-0) | Table 1, p. 2, row 8; `ORC-GJ5VRCK3ZF.06d246` |  |
| Lattice c | 58.1 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Lazorenko 1974_ | Table 1, p. 2, row 6; `ORC-KYNARDNMFZ.a0e807` |  |
| Lattice c | 5.76 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 1, p. 2, row 4; `ORC-QCCFEUJQAI.b92983` |  |
| Lattice c | 5.812 Å | 298.15 | Sc5Si3; _alloy: Si 0.375_ | experimental | [1] Qin 2015; _cites Arbuckle 1962_ [doi](https://doi.org/10.1107/s0365110x62003217) | Table 1, p. 2, row 5; `ORC-ZJ3EMB6AIP.dd9d8d` |  |
| Lattice c | 3.657 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Eremenko 1988_ [doi](https://doi.org/10.1007/bf00794560) | Table 1, p. 2, row 9; `ORC-64HIZQWHKB.ee9b32` |  |
| Lattice c | 3.65 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Dvorina 1965_ | Table 1, p. 2, row 10; `ORC-E5NIVP3YBJ.a3bf8d` |  |
| Lattice c | 3.65 Å | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Lazorenko 1974_ | Table 1, p. 2, row 12; `ORC-EVRNH7D5OY.91b1a0` |  |
| Lattice c | 0.3659 not_printed ± 2.000e-4 | 298.15 | ScSi; _alloy: Si 0.5_ | experimental | [1] Qin 2015; _cites Schob 1965_ [doi](https://doi.org/10.1107/s0365110x65003134) | Table 1, p. 2, row 11; `ORC-SKUDVBH6RX.43f6ae` |  |
| Lattice c | 3.877 Å | 298.15 | αSc2Si3; _alloy: Si 0.6_ | experimental | [1] Qin 2015; _cites Schob 1964_ [doi](https://doi.org/10.1007/bf00901700) | Table 1, p. 2, row 13; `ORC-COKFFI7PUI.1edc26` |  |
| Lattice c | 3.87 Å | 298.15 | αSc3Si5; _alloy: Si 0.625_ | experimental | [1] Qin 2015; _cites Lazorenko 1974_ | Table 1, p. 2, row 15; `ORC-NCCVUC3ZVJ.f0b832` |  |
| Lattice c | 0.387 not_printed ± 0.001 | 298.15 | αSc3Si5; _alloy: Si 0.625_ | experimental | [1] Qin 2015; _cites Gladyshevskii 1963_ | Table 1, p. 2, row 14; `ORC-SQR4YSJ64Y.7d06c5` |  |

## Sources

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

1. Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2)

## 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/).