# Cr–Ga system

> Cr–Ga system: 61 accepted literature values (formation 46, invariant reaction 12, heat capacity / entropy / enthalpy 3) and 2 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

61 accepted literature values from 2 paper(s) (experimental 26, model 35); 2 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/CR-GA.json) · [CSV](https://data.orchid-project.org/systems/CR-GA.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CR-GA) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CR-GA/CrGa-05Bel.json) · [phases (10)](https://data.orchid-project.org/phases/pages/CR-GA.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CR-GA.html) · [Markdown](https://data.orchid-project.org/systems/CR-GA.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 26 |
| model | 35 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 12 |
| formation | 46 |
| heat capacity / entropy / enthalpy | 3 |

## 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 |
|---|---|---|---|
| CrGa-05Bel.tdb | A. Belgacem-Bouzida, Y. Djaballa, M. Notin, J. Alloys Compd., 397, 155-60(2005). [doi:10.1016/j.jallcom.2005.01.026](https://doi.org/10.1016/j.jallcom.2005.01.026) | `d905d1a4fa49ed9e18a8cabd7c727a4ac2cb7c687dd51115590bdc391fbe8d7a` | [viewer](https://orchid-project.org/phase-diagrams/#CR-GA/CrGa-05Bel.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrGa-05Bel.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrGa-05Bel.json) |
| CrGa-99Gro.tdb | J. Groebner, R. Wenzel, G.G. Fischer, R. Schmid-Fetzer, J. Phase Equilib., 20, 615-25(1999). [doi:10.1361/105497199770340608](https://doi.org/10.1361/105497199770340608) | `1cd0f87b555dfe93a6d6b97858b3bfc5399fff79d61dbef942d027ee13075555` | [viewer](https://orchid-project.org/phase-diagrams/#CR-GA/CrGa-99Gro.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CrGa-99Gro.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CrGa-99Gro.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CrGa-05Bel.tdb | 1920.44 | BCC_A2 (x(Ga) 0.15749) + CR3GA_BETA (x(Ga) 0.23) + LIQUID (x(Ga) 0.31915) |
| CrGa-05Bel.tdb | 1373.64 | BCC_A2 (x(Ga) 0.14478) + CR3GA_A15 (x(Ga) 0.23) + CR3GA_BETA (x(Ga) 0.23) |
| CrGa-05Bel.tdb | 1373.64 | CR3GA_A15 (x(Ga) 0.23) + CR3GA_BETA (x(Ga) 0.23) + LIQUID (x(Ga) 0.65029) |
| CrGa-05Bel.tdb | 1373.64 | CR3GA_BETA (x(Ga) 0.23) + CR3GA_A15 (x(Ga) 0.23) + LIQUID (x(Ga) 0.6506) |
| CrGa-05Bel.tdb | 1156.42 | CR3GA_A15 (x(Ga) 0.23) + CRGA_D810 (x(Ga) 0.5) + LIQUID (x(Ga) 0.80888) |
| CrGa-05Bel.tdb | 1156.42 | CR3GA_A15 (x(Ga) 0.23) + CRGA_D810 (x(Ga) 0.5) + LIQUID (x(Ga) 0.8086) |
| CrGa-05Bel.tdb | 1156.42 | CR3GA_A15 (x(Ga) 0.23) + CRGA_D810 (x(Ga) 0.5) + LIQUID (x(Ga) 0.80911) |
| CrGa-05Bel.tdb | 1048.12 | CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.567) + LIQUID (x(Ga) 0.92457) |
| CrGa-05Bel.tdb | 1048.12 | CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.567) + LIQUID (x(Ga) 0.92489) |
| CrGa-05Bel.tdb | 1048.12 | CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.567) + LIQUID (x(Ga) 0.92508) |
| CrGa-05Bel.tdb | 1009 | CR3GA_A15 (x(Ga) 0.23) + CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.567) |
| CrGa-05Bel.tdb | 973.03 | CR5GA6 (x(Ga) 0.567) + CRGA4 (x(Ga) 0.77) + LIQUID (x(Ga) 0.9749) |
| CrGa-05Bel.tdb | 973.03 | CR5GA6 (x(Ga) 0.567) + CRGA4 (x(Ga) 0.77) + LIQUID (x(Ga) 0.97498) |
| CrGa-05Bel.tdb | 973.03 | CR5GA6 (x(Ga) 0.567) + CRGA4 (x(Ga) 0.77) + LIQUID (x(Ga) 0.97511) |
| CrGa-05Bel.tdb | 302.91 | CRGA4 (x(Ga) 0.77) + ORTHORHOMBIC_A11 (x(Ga) 1) + LIQUID (x(Ga) 1) |
| CrGa-99Gro.tdb | 1870.49 | BCC_A2 (x(Ga) 0.14432) + CR3GA_A15 (x(Ga) 0.25) + LIQUID (x(Ga) 0.55472) |
| CrGa-99Gro.tdb | 1179.89 | CR3GA_A15 (x(Ga) 0.25) + CRGA_D810 (x(Ga) 0.5) + LIQUID (x(Ga) 0.82748) |
| CrGa-99Gro.tdb | 1179.89 | CR3GA_A15 (x(Ga) 0.25) + CRGA_D810 (x(Ga) 0.5) + LIQUID (x(Ga) 0.82745) |
| CrGa-99Gro.tdb | 1179.89 | CR3GA_A15 (x(Ga) 0.25) + CRGA_D810 (x(Ga) 0.5) + LIQUID (x(Ga) 0.82743) |
| CrGa-99Gro.tdb | 1047.23 | CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.54545) + LIQUID (x(Ga) 0.85758) |
| CrGa-99Gro.tdb | 1047.23 | CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.54545) + LIQUID (x(Ga) 0.85757) |
| CrGa-99Gro.tdb | 1047.23 | CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.54545) + LIQUID (x(Ga) 0.8576) |
| CrGa-99Gro.tdb | 1029.04 | CR3GA_A15 (x(Ga) 0.25) + CRGA_D810 (x(Ga) 0.5) + CR5GA6 (x(Ga) 0.54545) |
| CrGa-99Gro.tdb | 973.43 | CR5GA6 (x(Ga) 0.54545) + CRGA4 (x(Ga) 0.8) + LIQUID (x(Ga) 0.87936) |
| CrGa-99Gro.tdb | 973.43 | CR5GA6 (x(Ga) 0.54545) + CRGA4 (x(Ga) 0.8) + LIQUID (x(Ga) 0.87926) |
| CrGa-99Gro.tdb | 973.43 | CR5GA6 (x(Ga) 0.54545) + CRGA4 (x(Ga) 0.8) + LIQUID (x(Ga) 0.87937) |
| CrGa-99Gro.tdb | 302.91 | CRGA4 (x(Ga) 0.8) + ORTHORHOMBIC_A11 (x(Ga) 1) + LIQUID (x(Ga) 1) |
| CrGa-99Gro.tdb | 302.91 | CRGA4 (x(Ga) 0.8) + ORTHORHOMBIC_A11 (x(Ga) 1) + LIQUID (x(Ga) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CR/CR-GA.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CR/CR-GA.json) · [CALPHAD hull CrGa-99Gro](https://data.orchid-project.org/hulls/calphad-sgte/CR/CR-GA--CrGa-99Gro.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Cr–Ga system (12)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1902.15 | L + Cr -> β-Cr3Ga | L: Ga 0.324; β-Cr3Ga: Ga 0.25 | model | [1] Belgacem-Bouzida 2005 | Table 5, p. 5, row 2; `ORC-43C2OQ2SLU` |  |
| 1893.15 | L + Cr -> β-Cr3Ga | L: Ga 0.33; β-Cr3Ga: Ga 0.25 | experimental | [1] Belgacem-Bouzida 2005; _cites Bornand 1972_ [doi](https://doi.org/10.1016/0022-5088%2872%2990149-x) | Table 5, p. 5, row 1; `ORC-QYG6XU5M4U` |  |
| 1374.15 | L + Cr -> α-Cr3Ga | L: Ga 0.656; α-Cr3Ga: Ga 0.25 | model | [1] Belgacem-Bouzida 2005 | Table 5, p. 5, row 4; `ORC-YZXZE33EWP` |  |
| 1373.15 | L + Cr -> α-Cr3Ga | L: Ga 0.635; α-Cr3Ga: Ga 0.25 | experimental | [1] Belgacem-Bouzida 2005; _cites Bornand 1972_ [doi](https://doi.org/10.1016/0022-5088%2872%2990149-x) | Table 5, p. 5, row 3; `ORC-QVTMDID3HS` |  |
| 1156.15 | L + α-Cr3Ga -> CrGa | L: Ga 0.807; α-Cr3Ga: Ga 0.25; CrGa: Ga 0.5 | model | [1] Belgacem-Bouzida 2005 | Table 5, p. 5, row 6; `ORC-D6BELBTZ3W` |  |
| 1153.15 | L + α-Cr3Ga -> CrGa | L: Ga 0.83; α-Cr3Ga: Ga 0.25; CrGa: Ga 0.5 | experimental | [1] Belgacem-Bouzida 2005; _cites Bornand 1972_ [doi](https://doi.org/10.1016/0022-5088%2872%2990149-x) | Table 5, p. 5, row 5; `ORC-WC4H56O6ID` |  |
| 1048.15 | L + α-CrGa -> Cr5Ga | L: Ga 0.923; α-CrGa: Ga 0.5; Cr5Ga: Ga 0.166667 | model | [1] Belgacem-Bouzida 2005 | Table 5, p. 5, row 8; `ORC-76G7QWVCHF` |  |
| 1048.15 | L + α-CrGa -> Cr5Ga | L: Ga 0.925; α-CrGa: Ga 0.5; Cr5Ga: Ga 0.166667 | experimental | [1] Belgacem-Bouzida 2005; _cites Bornand 1972_ [doi](https://doi.org/10.1016/0022-5088%2872%2990149-x) | Table 5, p. 5, row 7; `ORC-O23MVPMAAV` |  |
| 1033.15 | α-Cr3Ga + CrGa -> Cr5Ga6 | α-Cr3Ga: Ga 0.25; CrGa: Ga 0.5; Cr5Ga6: Ga 0.545455 | experimental | [1] Belgacem-Bouzida 2005; _cites Bornand 1972_ [doi](https://doi.org/10.1016/0022-5088%2872%2990149-x) | Table 5, p. 5, row 9; `ORC-2GQFYYFYSK` |  |
| 1009.15 | α-Cr3Ga + CrGa -> Cr5Ga6 | α-Cr3Ga: Ga 0.25; CrGa: Ga 0.5; Cr5Ga6: Ga 0.545455 | model | [1] Belgacem-Bouzida 2005 | Table 5, p. 5, row 10; `ORC-BBZT2HAEPM` |  |
| 973.15 | L + Cr5Ga6 -> CrGa4 | L: Ga 0.974; Cr5Ga6: Ga 0.545455; CrGa4: Ga 0.8 | model | [1] Belgacem-Bouzida 2005 | Table 5, p. 5, row 12; `ORC-AUYUO7Q7KS` |  |
| 973.15 | L + Cr5Ga6 -> CrGa4 | L: Ga 0.975; Cr5Ga6: Ga 0.545455; CrGa4: Ga 0.8 | experimental | [1] Belgacem-Bouzida 2005; _cites Bornand 1972_ [doi](https://doi.org/10.1016/0022-5088%2872%2990149-x) | Table 5, p. 5, row 11; `ORC-ZB4LHQ2ANK` |  |

## 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–Ga system (34)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Cr3Ga | [Cr3Ga](https://data.orchid-project.org/compounds/Cr3Ga.html) | -12 kJ/mol-atom | 298.15 | model | -4.035 (mp-aaaaabvj) | -5.328 (oqmd-29544) | [2] Gröbner 1999; _cites F 1988_ | Table 1, p. 2, row 44; `ORC-HPVWA4L4FN` |  |
| Cr3Ga | [Cr3Ga](https://data.orchid-project.org/compounds/Cr3Ga.html) | -9.75 kJ/mol-atom | 298.15 | model | -4.035 (mp-aaaaabvj) | -5.328 (oqmd-29544) | [2] Gröbner 1999 | Table 1, p. 2, row 43; `ORC-O4PI5Z75L3` |  |
| Cr3Ga | [Cr3Ga](https://data.orchid-project.org/compounds/Cr3Ga.html) | -3.3 kJ/mol-atom | 850 | experimental | -4.035 (mp-aaaaabvj) | -5.328 (oqmd-29544) | [2] Gröbner 1999; _cites Gonchuruk 1981_ | Table 1, p. 2, row 42; `ORC-53IIUR4NZJ` |  |
| Cr3Ga (α) |  | -12 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005; _cites Djaballah 1999_ | Table 4, p. 4, row 3; `ORC-B7HQFH6PTM.f0b169` |  |
| Cr3Ga (α) |  | -9.75 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 2; `ORC-M5YUOI26LF.36378e` |  |
| Cr3Ga (α) |  | -8.24 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 5; `ORC-IMJ2YHKYO4.557482` |  |
| Cr3Ga (α) |  | -8.1 kJ/mol (basis unstated) ± 0.3 | 298.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 4; `ORC-YGA7IGDSYT.4883a2` |  |
| Cr3Ga (α) |  | -3.3 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Belgacem-Bouzida 2005; _cites Goncharuk 1981_ | Table 4, p. 4, row 1; `ORC-QKSWTRNKAC.21cf2d` |  |
| Cr3Ga (β) |  | -7.25 kJ/mol (basis unstated) ± 0.7 | 298.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 6; `ORC-DMAPRTZ5PN.8e7adf` |  |
| Cr3Ga (β) |  | -6.98 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 7; `ORC-VXXPI7UC5G.564607` |  |
| Cr5Ga6 |  | -15.15 kJ/mol-atom | 298.15 | model |  |  | [2] Gröbner 1999 | Table 1, p. 2, row 48; `ORC-WVUHLIPTRD` |  |
| Cr5Ga6 |  | -15.15 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 11; `ORC-Y6TCZY3IMC.285f2c` |  |
| Cr5Ga6 |  | -15 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005; _cites Djaballah 1999_ | Table 4, p. 4, row 12; `ORC-CI6UGP7Q7R.0aa357` |  |
| Cr5Ga6 |  | -15 kJ/mol-atom | 298.15 | model |  |  | [2] Gröbner 1999; _cites F 1988_ | Table 1, p. 2, row 49; `ORC-VY6XNWUGCN` |  |
| Cr5Ga6 |  | -12.31 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 13; `ORC-BOASBF7OYK.46886a` |  |
| Cr5Ga6 |  | -4.7 kJ/mol-atom | 850 | experimental |  |  | [2] Gröbner 1999; _cites Gonchuruk 1981_ | Table 1, p. 2, row 47; `ORC-KLXBROIIET` |  |
| Cr5Ga6 |  | -4.7 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Belgacem-Bouzida 2005; _cites Goncharuk 1981_ | Table 4, p. 4, row 10; `ORC-ZXJAILDJIL.35d9e5` |  |
| CrGa | [CrGa](https://data.orchid-project.org/compounds/CrGa.html) | -16 kJ/mol-atom | 298.15 | model | -1.491 (mp-aaacphey) | -0.148 (oqmd-2052343) | [2] Gröbner 1999; _cites F 1988_ | Table 1, p. 2, row 45; `ORC-OWKDAI3R4Q` |  |
| CrGa |  | -7.29 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 8; `ORC-7BVXWGCWBF.6f6073` |  |
| CrGa | [CrGa](https://data.orchid-project.org/compounds/CrGa.html) | -7.29 kJ/mol-atom | 298.15 | model | -1.491 (mp-aaacphey) | -0.148 (oqmd-2052343) | [2] Gröbner 1999 | Table 1, p. 2, row 46; `ORC-TCYNIHPGS5` |  |
| CrGa |  | -6.06 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 9; `ORC-LJL6NCPKWK.a492bd` |  |
| CrGa4 |  | -14.5 kJ/mol (basis unstated) ± 1 | 298.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 17; `ORC-2LSCEO6CFI.699584` |  |
| CrGa4 |  | -13.3 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 18; `ORC-6RRP3SQF6Z.94431a` |  |
| CrGa4 |  | -8.7 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 15; `ORC-BMIDUT3K6Z.241ef3` |  |
| CrGa4 | [CrGa4](https://data.orchid-project.org/compounds/CrGa4.html) | -8.7 kJ/mol-atom | 298.15 | model | -15.083 (mp-aaacixqu) | -14.848 (oqmd-29545) | [2] Gröbner 1999 | Table 1, p. 2, row 51; `ORC-XSJOSAEFRS` |  |
| CrGa4 | [CrGa4](https://data.orchid-project.org/compounds/CrGa4.html) | -8 kJ/mol-atom | 298.15 | model | -15.083 (mp-aaacixqu) | -14.848 (oqmd-29545) | [2] Gröbner 1999; _cites F 1988_ | Table 1, p. 2, row 52; `ORC-E75E4K7GGZ` |  |
| CrGa4 |  | -8 kJ/mol (basis unstated) |  | model |  |  | [1] Belgacem-Bouzida 2005; _cites Djaballah 1999_ | Table 4, p. 4, row 16; `ORC-KBFYK3W67R.ab47df` |  |
| CrGa4 |  | -7.6 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Belgacem-Bouzida 2005; _cites Goncharuk 1981_ | Table 4, p. 4, row 14; `ORC-JDWJ6L5EI5.84864f` |  |
| CrGa4 | [CrGa4](https://data.orchid-project.org/compounds/CrGa4.html) | -7.6 kJ/mol-atom | 850 | experimental | -15.083 (mp-aaacixqu) | -14.848 (oqmd-29545) | [2] Gröbner 1999; _cites Gonchuruk 1981_ | Table 1, p. 2, row 50; `ORC-L22J4J3CQP` |  |
| α-Cr3Ga |  | -8.56 kJ/mol (basis unstated) | 1323.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 1, p. 3, row 2; `ORC-CG5RML5MZE.101824` |  |
| α-Cr3Ga |  | -8.1 kJ/mol (basis unstated) | 1323.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 1, p. 3, row 2; `ORC-CG5RML5MZE.f69791` |  |
| α-Cr3Ga |  | -7.97 kJ/mol (basis unstated) | 1323.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 1, p. 3, row 4; `ORC-BCXMPWE2FO` |  |
| α-Cr3Ga |  | -7.76 kJ/mol (basis unstated) | 1323.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 1, p. 3, row 3; `ORC-A4UOZ35KKG` |  |
| β-Cr3Ga |  | -7.25 kJ/mol (basis unstated) | 1423.15 | experimental |  |  | [1] Belgacem-Bouzida 2005 | Table 2, p. 3, row 1; `ORC-23WTCH5NJA` |  |

## Other properties

### Formation (12)

Table: Formation, Cr–Ga system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: ΔfS_ | 5.444 J/mol (basis unstated)/K |  | Cr3Ga (α); _alloy: Ga 0.25_ | model | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 5; `ORC-IMJ2YHKYO4.a3d6b3` |  |
| Entropy of formation; _printed: ΔfS_ | 1.884 J/mol (basis unstated)/K |  | Cr3Ga (α); _alloy: Ga 0.25_ | model | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 2; `ORC-M5YUOI26LF.9a402c` |  |
| Entropy of formation; _printed: ΔfS_ | 6.362 J/mol (basis unstated)/K |  | Cr3Ga (β); _alloy: Ga 0.25_ | model | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 7; `ORC-VXXPI7UC5G.1c11de` |  |
| Entropy of formation; _printed: ΔfS_ | 2.37 J/mol (basis unstated)/K |  | Cr5Ga6; _alloy: Ga 0.545455_ | model | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 13; `ORC-BOASBF7OYK.6590e8` |  |
| Entropy of formation; _printed: ΔfS_ | 0.792 J/mol (basis unstated)/K |  | Cr5Ga6; _alloy: Ga 0.545455_ | model | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 11; `ORC-Y6TCZY3IMC.4dd12a` |  |
| Entropy of formation; _printed: ΔfS_ | 6.146 J/mol (basis unstated)/K |  | CrGa; _alloy: Ga 0.5_ | model | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 8; `ORC-7BVXWGCWBF.514e22` |  |
| Entropy of formation; _printed: ΔfS_ | 8.378 J/mol (basis unstated)/K |  | CrGa; _alloy: Ga 0.5_ | model | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 9; `ORC-LJL6NCPKWK.1cf8f7` |  |
| Entropy of formation; _printed: ΔfS_ | 0.435 J/mol (basis unstated)/K |  | CrGa4; _alloy: Ga 0.8_ | model | [1] Belgacem-Bouzida 2005 | Table 4, p. 4, row 18; `ORC-6RRP3SQF6Z.9c9238` |  |
| Entropy of formation; _printed: ΔfS_ | 6.3 J/mol (basis unstated)/K |  | CrGa4; _alloy: Ga 0.8_ | model | [1] Belgacem-Bouzida 2005; _cites Grobner 1999_ [doi](https://doi.org/10.1361/105497199770340608) | Table 4, p. 4, row 15; `ORC-BMIDUT3K6Z.8fa4d7` |  |
| Entropy of formation; _printed: ΔfS_ | 2.7 J/mol (basis unstated)/K | 298.15 | Cr3Ga (α); _alloy: Ga 0.25_ | experimental | [1] Belgacem-Bouzida 2005; _cites Goncharuk 1981_ | Table 4, p. 4, row 1; `ORC-QKSWTRNKAC.12a0a7` |  |
| Entropy of formation; _printed: ΔfS_ | 4.8 J/mol (basis unstated)/K | 298.15 | Cr5Ga6; _alloy: Ga 0.545455_ | experimental | [1] Belgacem-Bouzida 2005; _cites Goncharuk 1981_ | Table 4, p. 4, row 10; `ORC-ZXJAILDJIL.21e882` |  |
| Entropy of formation; _printed: ΔfS_ | 2.9 J/mol (basis unstated)/K | 298.15 | CrGa4; _alloy: Ga 0.8_ | experimental | [1] Belgacem-Bouzida 2005; _cites Goncharuk 1981_ | Table 4, p. 4, row 14; `ORC-JDWJ6L5EI5.0e8cb1` |  |

### Heat capacity / entropy / enthalpy (3)

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

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Heat content; _printed: Enthalpy of heating_ | 31390 J/mol | 810.65 | α-Cr3Ga; _alloy: Ga 0.25_ | experimental | [1] Belgacem-Bouzida 2005 | Table 1, p. 3, row 5; `ORC-V35LLF2C3L` |  |
| Heat content; _printed: Enthalpy of heating_ | 34900 J/mol | 860.65 | β-Cr3Ga; _alloy: Ga 0.25_ | experimental | [1] Belgacem-Bouzida 2005 | Table 2, p. 3, row 4; `ORC-Q2Y4GNQN2Z` |  |
| Heat content; _printed: Enthalpy of heating_ | 31390 J/mol | 1323.15 | α-Cr3Ga; _alloy: Ga 0.25_ | experimental | [1] Belgacem-Bouzida 2005 | Table 1, p. 3, row 1; `ORC-IQR7EIJLTI` |  |

## Sources

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

1. A. Belgacem-Bouzida, Y. Djaballah, M. Notin, Calorimetric measurement of the intermetallic compounds Cr3Ga and CrGa4 and thermodynamic assessment of the (Cr–Ga) system, Journal of Alloys and Compounds 397, 155-160 (2005). [doi:10.1016/j.jallcom.2005.01.026](https://doi.org/10.1016/j.jallcom.2005.01.026)
2. J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999). [doi:10.1361/105497199770340608](https://doi.org/10.1361/105497199770340608)

## 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/).