# Co–Cr system

> Co–Cr system: 44 accepted literature values (formation 17, mixing / partial 15, phase equilibrium 7, crystal structure 3) and 10 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

44 accepted literature values from 5 paper(s) (experimental 10, model 2, DFT 32); 10 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/CO-CR.json) · [CSV](https://data.orchid-project.org/systems/CO-CR.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CO-CR) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-01Oik.json) · [phases (9)](https://data.orchid-project.org/phases/pages/CO-CR.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CO-CR.html) · [Markdown](https://data.orchid-project.org/systems/CO-CR.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 10 |
| model | 2 |
| DFT | 32 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| phase equilibrium | 7 |
| formation | 17 |
| mixing / partial | 15 |
| activity / EMF / Gibbs energy | 2 |
| crystal structure | 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 |
|---|---|---|---|
| CoCr-01Oik.tdb | K. Oikawa, G.W. Qin, T. Ikeshoji, O. Kitakami, Y. Shimada, K. Ishida, K. Fukamichi, J. Magn. Magn. Mater., 236, 220-33(2001). [doi:10.1016/S0304-8853(00)00520-5](https://doi.org/10.1016/S0304-8853%2800%2900520-5) | `57d2f2a8706dc2393965814cb6a354343fb837b58440fbbaf866390b28dad1de` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-01Oik.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-01Oik.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-01Oik.json) |
| CoCr-02Oik.tdb | K. Oikawa, G.-W. Qin, T. Ikeshoji, R. Kainuma, K. Ishida, Acta Mater., 50, 2223-32(2002). [doi:10.1016/S1359-6454(01)00433-5](https://doi.org/10.1016/S1359-6454%2801%2900433-5) | `0dd550c23273e5cf3f733b20435862fa65f8a78917012469aa1b962876322567` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-02Oik.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-02Oik.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-02Oik.json) |
| CoCr-18Cac.tdb | G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018). [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) | `d43dc8f1217be4a80f00d1b0772988997519c925dff1bb48f9ea8570c0adc0d9` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-18Cac.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-18Cac.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-18Cac.json) |
| CoCr-19Wan.tdb | P. Wang, M.C. Peters, U.R. Kattner, K. Choudhary, G.B. Olson, Intermetallics, 105, 13-20(2019). [doi:10.1016/j.intermet.2018.11.004](https://doi.org/10.1016/j.intermet.2018.11.004) | `4875fa24c4f980cd07832cae588681889c74ce2b36384857eb730d79af99e04e` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-19Wan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-19Wan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-19Wan.json) |
| CoCr-20Ost.tdb | M. Ostrowska, G. Cacciamani, J. Alloys Compd, 845, 156122(2020). [doi:10.1016/j.jallcom.2020.156122](https://doi.org/10.1016/j.jallcom.2020.156122) | `c1b476f7f08744ab59ffd0311faaead7625b58ee222d710a1803514d7fc916b2` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-20Ost.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-20Ost.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-20Ost.json) |
| CoCr-20Zha.tdb | N. Zhao, W. Liu, J.-J. Wang, X.-G. Lu, L. Zhang, Calphad, 71, 101996(2020). [doi:10.1016/j.calphad.2020.101996](https://doi.org/10.1016/j.calphad.2020.101996) | `e8c86411f86b27256cf5dc90d7502a718faaaf811a996b25a41a6d011a7d0c96` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-20Zha.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-20Zha.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-20Zha.json) |
| CoCr-23Sha.tdb | G. Shang, C.-H. Xia, Z.-Z. Liu, X.-G. Lu, Calphad, 80, 102526(2023). [doi:10.1016/j.calphad.2022.102526](https://doi.org/10.1016/j.calphad.2022.102526) | `499be26cf3d8b68c1fd9d4c9d24fc7ac482743bb28b9b16059bc349775bf5498` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-23Sha.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-23Sha.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-23Sha.json) |
| CoCr-24Per.tdb | J.C. Pereira dos Santos, S. Griesemer, N. Dupin, U.R. Kattner, C. Liu, D. Ivanova, T. Hammerschmidt, S.G. Fries, C. Wolverton, C.E. Campbell, J. Phase Equilib. Diffus., 45, 330-57(2024). [doi:10.1007/s11669-023-01079-3](https://doi.org/10.1007/s11669-023-01079-3) | `b109b5d55d4c95c09415d0e86b7ccd46b4c15496becfcf70700039e0602caeac` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-24Per.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-24Per.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-24Per.json) |
| CoCr-88Jan.tdb | B. Jansson, IM-2347 report, 1988. | `c6d50d8fb6f4b32935613e63113da00ba6373027125e4f38474d977c6c3f47d3` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-88Jan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-88Jan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-88Jan.json) |
| CoCr-97Kus-LB.tdb | A. Kusoffsky, B. Jansson, Calphad, 21, 321-33(1997). [doi:10.1016/S0364-5916(97)00033-3](https://doi.org/10.1016/S0364-5916%2897%2900033-3) | `1b1278fbadb50a2d2f9fe791f4115e6fef38122859ec196d2273338e98eb028c` | [viewer](https://orchid-project.org/phase-diagrams/#CO-CR/CoCr-97Kus-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoCr-97Kus-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoCr-97Kus-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CoCr-01Oik.tdb | 1655.6 | FCC_A1 (x(Cr) 0.39837) + LIQUID (x(Cr) 0.43836) + BCC_A2 (x(Cr) 0.49351) |
| CoCr-01Oik.tdb | 1545.98 | FCC_A1 (x(Cr) 0.43304) + BCC_A2 (x(Cr) 0.55973) + SIGMA_OLD (x(Cr) 0.57638) |
| CoCr-01Oik.tdb | 1280.15 | FCC_A1 (x(Cr) 0.37119) + HCP_A3 (x(Cr) 0.41474) + SIGMA_OLD (x(Cr) 0.54193) |
| CoCr-01Oik.tdb | 1061.8 | FCC_A1 (x(Cr) 0.02585) + FCC_A1#2 (x(Cr) 0.13946) + HCP_A3 (x(Cr) 0.15069) |
| CoCr-01Oik.tdb | 1053.89 | FCC_A1 (x(Cr) 0.02488) + HCP_A3#2 (x(Cr) 0.04457) + HCP_A3 (x(Cr) 0.15464) |
| CoCr-01Oik.tdb | 676.13 | HCP_A3 (x(Cr) 0.03067) + HCP_A3#2 (x(Cr) 0.32856) + SIGMA_OLD (x(Cr) 0.54023) |
| CoCr-02Oik.tdb | 1673.7 | FCC_A1 (x(Cr) 0.40363) + LIQUID (x(Cr) 0.44941) + BCC_A2 (x(Cr) 0.49993) |
| CoCr-02Oik.tdb | 1556.48 | FCC_A1 (x(Cr) 0.43363) + SIGMA_OLD (x(Cr) 0.55422) + BCC_A2 (x(Cr) 0.55932) |
| CoCr-02Oik.tdb | 1269.19 | FCC_A1 (x(Cr) 0.37682) + HCP_A3 (x(Cr) 0.39281) + SIGMA_OLD (x(Cr) 0.54193) |
| CoCr-02Oik.tdb | 1036.3 | FCC_A1 (x(Cr) 0.02951) + FCC_A1#2 (x(Cr) 0.15029) + HCP_A3 (x(Cr) 0.16152) |
| CoCr-02Oik.tdb | 742.1 | FCC_A1 (x(Cr) 0.01406) + HCP_A3#2 (x(Cr) 0.01955) + HCP_A3 (x(Cr) 0.30281) |
| CoCr-02Oik.tdb | 604.98 | HCP_A3 (x(Cr) 0.01129) + HCP_A3#2 (x(Cr) 0.37789) + SIGMA_OLD (x(Cr) 0.62911) |
| CoCr-18Cac.tdb | 1674.75 | FCC_A1 (x(Cr) 0.40069) + LIQUID (x(Cr) 0.44615) + BCC_A2 (x(Cr) 0.47304) |
| CoCr-18Cac.tdb | 1530.28 | FCC_A1 (x(Cr) 0.44766) + SIGMA_D8B (x(Cr) 0.54072) + BCC_A2 (x(Cr) 0.56078) |
| CoCr-18Cac.tdb | 1252.53 | FCC_A1 (x(Cr) 0.38744) + HCP_A3 (x(Cr) 0.40517) + SIGMA_D8B (x(Cr) 0.5163) |
| CoCr-18Cac.tdb | 1016.99 | FCC_A1 (x(Cr) 0.02862) + FCC_A1#2 (x(Cr) 0.16032) + HCP_A3 (x(Cr) 0.17149) |
| CoCr-18Cac.tdb | 736.59 | FCC_A1 (x(Cr) 0.01404) + HCP_A3#2 (x(Cr) 0.01907) + HCP_A3 (x(Cr) 0.30665) |
| CoCr-18Cac.tdb | 589.23 | HCP_A3 (x(Cr) 0.01026) + HCP_A3#2 (x(Cr) 0.38765) + SIGMA_D8B (x(Cr) 0.5537) |
| CoCr-19Wan.tdb | 1918.26 | LIQUID (x(Cr) 0.75976) + SIGMA_ORD (x(Cr) 0.77335) + BCC_A2 (x(Cr) 0.85174) |
| CoCr-19Wan.tdb | 1676.01 | FCC_A1 (x(Cr) 0.39087) + LIQUID (x(Cr) 0.431) + SIGMA_ORD (x(Cr) 0.58637) |
| CoCr-19Wan.tdb | 1224.58 | FCC_A1 (x(Cr) 0.34381) + HCP_A3 (x(Cr) 0.37091) + SIGMA_ORD (x(Cr) 0.59469) |
| CoCr-19Wan.tdb | 1061.69 | FCC_A1 (x(Cr) 0.02601) + FCC_A1#2 (x(Cr) 0.1293) + HCP_A3 (x(Cr) 0.14538) |
| CoCr-19Wan.tdb | 947.59 | FCC_A1 (x(Cr) 0.01672) + HCP_A3#2 (x(Cr) 0.03394) + HCP_A3 (x(Cr) 0.19758) |
| CoCr-19Wan.tdb | 658.13 | HCP_A3 (x(Cr) 0.38772) + SIGMA_D8B (x(Cr) 0.58612) + SIGMA_ORD (x(Cr) 0.66057) |
| CoCr-19Wan.tdb | 589.58 | HCP_A3 (x(Cr) 0.01826) + HCP_A3#2 (x(Cr) 0.38309) + SIGMA_D8B (x(Cr) 0.59106) |
| CoCr-19Wan.tdb | 523.84 | HCP_A3 (x(Cr) 0.01316) + SIGMA_D8B (x(Cr) 0.6135) + SIGMA_ORD (x(Cr) 0.68617) |
| CoCr-19Wan.tdb | 364.93 | HCP_A3 (x(Cr) 0.00338) + SIGMA_ORD (x(Cr) 0.74674) + BCC_A2 (x(Cr) 0.99984) |
| CoCr-20Ost.tdb | 1669.79 | FCC_A1 (x(Cr) 0.40401) + LIQUID (x(Cr) 0.44554) + BCC_A2 (x(Cr) 0.48095) |
| CoCr-20Ost.tdb | 1525.05 | FCC_A1 (x(Cr) 0.42111) + BCC_A2 (x(Cr) 0.51356) + SIGMA_D8B (x(Cr) 0.5569) |
| CoCr-20Ost.tdb | 1242.19 | FCC_A1 (x(Cr) 0.36405) + HCP_A3 (x(Cr) 0.39346) + SIGMA_D8B (x(Cr) 0.53498) |
| CoCr-20Ost.tdb | 1061.69 | FCC_A1 (x(Cr) 0.02601) + FCC_A1#2 (x(Cr) 0.1293) + HCP_A3 (x(Cr) 0.14538) |
| CoCr-20Ost.tdb | 947.59 | FCC_A1 (x(Cr) 0.01672) + HCP_A3#2 (x(Cr) 0.03394) + HCP_A3 (x(Cr) 0.19758) |
| CoCr-20Ost.tdb | 593.97 | HCP_A3 (x(Cr) 0.01849) + HCP_A3#2 (x(Cr) 0.38038) + SIGMA_D8B (x(Cr) 0.58042) |
| CoCr-20Ost.tdb | 384.54 | HCP_A3 (x(Cr) 0.0045) + SIGMA_D8B (x(Cr) 0.65702) + BCC_A2 (x(Cr) 0.99971) |
| CoCr-20Zha.tdb | 1670.35 | FCC_A1 (x(Cr) 0.40915) + LIQUID (x(Cr) 0.44781) + BCC_A2 (x(Cr) 0.48232) |
| CoCr-20Zha.tdb | 1536.44 | FCC_A1 (x(Cr) 0.42803) + BCC_A2 (x(Cr) 0.52066) + SIGMA_D8B (x(Cr) 0.56034) |
| CoCr-20Zha.tdb | 1251.77 | FCC_A1 (x(Cr) 0.37294) + HCP_A3 (x(Cr) 0.41175) + SIGMA_D8B (x(Cr) 0.54882) |
| CoCr-20Zha.tdb | 1051.46 | FCC_A1 (x(Cr) 0.02653) + FCC_A1#2 (x(Cr) 0.14931) + HCP_A3 (x(Cr) 0.16743) |
| CoCr-20Zha.tdb | 992.83 | FCC_A1 (x(Cr) 0.02126) + HCP_A3#2 (x(Cr) 0.03904) + HCP_A3 (x(Cr) 0.19599) |
| CoCr-20Zha.tdb | 710.61 | HCP_A3#2 (x(Cr) 0.02608) + HCP_A3 (x(Cr) 0.35042) + SIGMA_D8B (x(Cr) 0.61103) |
| CoCr-23Sha.tdb | 1670.79 | FCC_A1 (x(Cr) 0.40674) + LIQUID (x(Cr) 0.44523) + BCC_A2 (x(Cr) 0.47922) |
| CoCr-23Sha.tdb | 1528.17 | FCC_A1 (x(Cr) 0.42698) + BCC_A2 (x(Cr) 0.52014) + SIGMA_D8B (x(Cr) 0.56673) |
| CoCr-23Sha.tdb | 1242.92 | FCC_A1 (x(Cr) 0.36233) + HCP_A3 (x(Cr) 0.39978) + SIGMA_D8B (x(Cr) 0.52988) |
| CoCr-23Sha.tdb | 1052.61 | FCC_A1 (x(Cr) 0.02658) + FCC_A1#2 (x(Cr) 0.14866) + HCP_A3 (x(Cr) 0.16678) |
| CoCr-23Sha.tdb | 993.44 | FCC_A1 (x(Cr) 0.02125) + HCP_A3#2 (x(Cr) 0.03907) + HCP_A3 (x(Cr) 0.19566) |
| CoCr-23Sha.tdb | 663.06 | HCP_A3 (x(Cr) 0.02367) + HCP_A3#2 (x(Cr) 0.3815) + SIGMA_D8B (x(Cr) 0.55303) |
| CoCr-23Sha.tdb | 453.21 | HCP_A3 (x(Cr) 0.00878) + SIGMA_D8B (x(Cr) 0.61969) + BCC_A2 (x(Cr) 0.99865) |
| CoCr-24Per.tdb | 1669.75 | FCC_A1 (x(Cr) 0.40409) + LIQUID (x(Cr) 0.44563) + BCC_A2 (x(Cr) 0.48102) |
| CoCr-24Per.tdb | 1532.13 | FCC_A1 (x(Cr) 0.42037) + BCC_A2 (x(Cr) 0.51193) + SIGMA_D8B (x(Cr) 0.5552) |
| CoCr-24Per.tdb | 1260.24 | FCC_A1 (x(Cr) 0.38364) + HCP_A3 (x(Cr) 0.41555) + SIGMA_D8B (x(Cr) 0.54105) |
| CoCr-24Per.tdb | 1061.69 | FCC_A1 (x(Cr) 0.02601) + FCC_A1#2 (x(Cr) 0.1293) + HCP_A3 (x(Cr) 0.14538) |
| CoCr-24Per.tdb | 947.59 | FCC_A1 (x(Cr) 0.01672) + HCP_A3#2 (x(Cr) 0.03394) + HCP_A3 (x(Cr) 0.19758) |
| CoCr-24Per.tdb | 564.68 | HCP_A3 (x(Cr) 0.01695) + HCP_A3#2 (x(Cr) 0.39889) + SIGMA_D8B (x(Cr) 0.58414) |
| CoCr-24Per.tdb | 388.49 | HCP_A3 (x(Cr) 0.00475) + SIGMA_D8B (x(Cr) 0.62915) + BCC_A2 (x(Cr) 0.99968) |
| CoCr-88Jan.tdb | 1669.95 | FCC_A1 (x(Cr) 0.41257) + LIQUID (x(Cr) 0.45271) + BCC_A2 (x(Cr) 0.51178) |
| CoCr-88Jan.tdb | 1542.3 | FCC_A1 (x(Cr) 0.43594) + BCC_A2 (x(Cr) 0.55514) + SIGMA_OLD (x(Cr) 0.58161) |
| CoCr-88Jan.tdb | 1240.31 | FCC_A1 (x(Cr) 0.36752) + HCP_A3 (x(Cr) 0.40545) + SIGMA_OLD (x(Cr) 0.53821) |
| CoCr-88Jan.tdb | 1040.03 | FCC_A1 (x(Cr) 0.02537) + FCC_A1#2 (x(Cr) 0.14195) + HCP_A3 (x(Cr) 0.17405) |
| CoCr-88Jan.tdb | 727.64 | FCC_A1 (x(Cr) 0.00392) + HCP_A3#2 (x(Cr) 0.00759) + HCP_A3 (x(Cr) 0.35309) |
| CoCr-88Jan.tdb | 656.21 | HCP_A3 (x(Cr) 0.00497) + HCP_A3#2 (x(Cr) 0.40476) + SIGMA_OLD (x(Cr) 0.55492) |
| CoCr-88Jan.tdb | 463.67 | HCP_A3 (x(Cr) 5.900e-4) + SIGMA_OLD (x(Cr) 0.65511) + BCC_A2 (x(Cr) 0.99849) |
| CoCr-97Kus-LB.tdb | 1668.32 | FCC_A1 (x(Cr) 0.41363) + LIQUID (x(Cr) 0.45008) + BCC_A2 (x(Cr) 0.49673) |
| CoCr-97Kus-LB.tdb | 1555.94 | SIGMA_D8B (x(Cr) 0.59655) + SIGMA_OLD (x(Cr) 0.60033) + BCC_A2 (x(Cr) 0.60161) |
| CoCr-97Kus-LB.tdb | 1544.47 | BCC_A2 (x(Cr) 0.54892) + SIGMA_OLD (x(Cr) 0.57567) + SIGMA_D8B (x(Cr) 0.5817) |
| CoCr-97Kus-LB.tdb | 1533.85 | FCC_A1 (x(Cr) 0.42967) + BCC_A2 (x(Cr) 0.52894) + SIGMA_OLD (x(Cr) 0.56554) |
| CoCr-97Kus-LB.tdb | 1498.18 | FCC_A1 (x(Cr) 0.4207) + SIGMA_OLD (x(Cr) 0.5614) + SIGMA_D8B (x(Cr) 0.57271) |
| CoCr-97Kus-LB.tdb | 1237.76 | FCC_A1 (x(Cr) 0.35146) + HCP_A3 (x(Cr) 0.39027) + SIGMA_D8B (x(Cr) 0.55183) |
| CoCr-97Kus-LB.tdb | 1052.14 | FCC_A1 (x(Cr) 0.02512) + FCC_A1#2 (x(Cr) 0.13787) + HCP_A3 (x(Cr) 0.17221) |
| CoCr-97Kus-LB.tdb | 729.41 | FCC_A1 (x(Cr) 0.00358) + HCP_A3 (x(Cr) 0.35866) + SIGMA_D8B (x(Cr) 0.57321) |
| CoCr-97Kus-LB.tdb | 727.75 | FCC_A1 (x(Cr) 0.00353) + HCP_A3 (x(Cr) 0.00719) + SIGMA_D8B (x(Cr) 0.57371) |
| CoCr-97Kus-LB.tdb | 388.96 | SIGMA_D8B (x(Cr) 0.65792) + SIGMA_OLD (x(Cr) 0.71727) + BCC_A2 (x(Cr) 0.99969) |
| CoCr-97Kus-LB.tdb | 378.19 | HCP_A3 (x(Cr) 9.000e-5) + SIGMA_D8B (x(Cr) 0.65824) + BCC_A2 (x(Cr) 0.99976) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CO/CO-CR.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CO/CO-CR.json) · [CALPHAD hull CoCr-01Oik](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-01Oik.json) · [CALPHAD hull CoCr-02Oik](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-02Oik.json) · [CALPHAD hull CoCr-18Cac](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-18Cac.json) · [CALPHAD hull CoCr-19Wan](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-19Wan.json) · [CALPHAD hull CoCr-20Ost](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-20Ost.json) · [CALPHAD hull CoCr-20Zha](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-20Zha.json) · [CALPHAD hull CoCr-23Sha](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-23Sha.json) · [CALPHAD hull CoCr-88Jan](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-88Jan.json) · [CALPHAD hull CoCr-97Kus-LB](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-CR--CoCr-97Kus-LB.json)

## 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, Co–Cr system (11)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| B2 |  | 16.597 kJ/mol-atom | 298.15 | DFT |  |  | [1] Liu 2016 | Table 4, p. 38, row 9; `ORC-HBJRP77ZUY.723a24` |  |
| B2-β |  | 11.99 kJ/mol-atom | 0 | DFT |  |  | [1] Liu 2016; _cites Al11Cr2_ | Table 6, p. 40, row 11; `ORC-VFAGMP4DJH.b72889` |  |
| CoCr | [CoCr](https://data.orchid-project.org/compounds/CoCr.html) | 6.77 kJ/mol-atom | 473 | experimental | 14.816 (mp-aaacfmex) | 2.922 (oqmd-1484947) | [2] Liu 2015; _cites ref. 67_ | p. 9; `ORC-PTULCSFOQW` | “However, Downie and Arslan \[67\] measured the formation enthalpy of one σCoCr sample close to the composition of the end-member σ-(Co)8(Cr)18(Cr)4 at 473 K and found ΔfH = 6.77 kJ/mol-atom.” |
| L12-γ’ |  | -10.48 kJ/mol-atom | 0 | DFT |  |  | [1] Liu 2016 | Table 7, p. 41, row 12; `ORC-TVEF5FPR33.27003d` |  |
| L12-γ’ |  | -5.04 kJ/mol-atom | 0 | DFT |  |  | [1] Liu 2016 | Table 7, p. 41, row 10; `ORC-BQZ45U6GCO.1a056d` |  |
| γ' |  | -10.48 kJ/mol-atom | 0 | DFT |  |  | [1] Liu 2016 | Table 7, p. 41, row 12; `ORC-TVEF5FPR33.1e3809` |  |
| γ' |  | -5.04 kJ/mol-atom | 0 | DFT |  |  | [1] Liu 2016 | Table 7, p. 41, row 10; `ORC-BQZ45U6GCO.1a17bc` |  |
| γ'-L12 |  | 6.475 kJ/mol-atom | 298.15 | DFT |  |  | [1] Liu 2016 | Table 4, p. 38, row 27; `ORC-MG3TNZV7PT.94413f` |  |
| γ'-L12 |  | 18.079 kJ/mol-atom | 298.15 | DFT |  |  | [1] Liu 2016 | Table 4, p. 38, row 28; `ORC-Y7PZJXNHY6.b22716` |  |
| σ |  | 6.77 per mol-atom ± 0.05 | 298.15 | experimental |  |  | [1] Liu 2016; _cites ref. 14_ | Table 5, p. 39, row 7; `ORC-RMYLUJSJJC.4c8284` |  |
| σ |  | 6.77 kJ/mol-atom | 473 | experimental |  |  | [1] Liu 2016; _cites ref. 14_ | p. 17; `ORC-TE2V2M76I2` | “Downie and Arslan \[14\] studied the formation enthalpy of one σ-CoCr sample close to the composition of the end-member σ-(Co)8(Cr)18(Cr)4 at 473 K and measured enthalpies of formation of 6.77 kJ/molatom.” |

## Other properties

### Phase equilibrium (7)

Table: Phase equilibrium, Co–Cr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  | 1023.15 | fcc_ferro + hcp_para + fccferro + hcppara; _fcc_ferro: Co 0.974, Cr 0.026; hcp_para: Co 0.828, Cr 0.172; fccferro: Co 0.974, Cr 0.026; hcppara: Co 0.828, Cr 0.172_ | experimental | [3] Oikawa 2002 | Table 1, p. 5, row 7; `ORC-SG5WXCMF2Y` |  |
| Phase composition |  | 1073.15 | fcc_ferro + fcc_para + fccferro + fccpara; _fcc_ferro: Co 0.968, Cr 0.032; fcc_para: Co 0.875, Cr 0.125; fccferro: Co 0.968, Cr 0.032; fccpara: Co 0.875, Cr 0.125_ | experimental | [3] Oikawa 2002 | Table 1, p. 5, row 5; `ORC-AHT5EZNAAV` |  |
| Phase composition |  | 1073.15 | fcc_para + hcp_para + fccpara + hcppara; _fcc_para: Co 0.822, Cr 0.178; hcp_para: Co 0.802, Cr 0.198; fccpara: Co 0.822, Cr 0.178; hcppara: Co 0.802, Cr 0.198_ | experimental | [3] Oikawa 2002 | Table 1, p. 5, row 6; `ORC-JEEXKBZFQ5` |  |
| Phase composition |  | 1123.15 | fcc_ferro + fcc_para + fccferro + fccpara; _fcc_ferro: Co 0.969, Cr 0.031; fcc_para: Co 0.925, Cr 0.075; fccferro: Co 0.969, Cr 0.031; fccpara: Co 0.925, Cr 0.075_ | experimental | [3] Oikawa 2002 | Table 1, p. 5, row 3; `ORC-EWCTXKX4ZA` |  |
| Phase composition |  | 1123.15 | fcc_para + hcp_para + fccpara + hcppara; _fcc_para: Co 0.779, Cr 0.221; hcp_para: Co 0.759, Cr 0.241; fccpara: Co 0.779, Cr 0.221; hcppara: Co 0.759, Cr 0.241_ | experimental | [3] Oikawa 2002 | Table 1, p. 5, row 4; `ORC-MYSRS7G6OJ` |  |
| Phase composition |  | 1173.15 | fcc_ferro + fcc_para + fccferro + fccpara; _fcc_ferro: Co 0.969, Cr 0.031; fcc_para: Co 0.942, Cr 0.058; fccferro: Co 0.969, Cr 0.031; fccpara: Co 0.942, Cr 0.058_ | experimental | [3] Oikawa 2002 | Table 1, p. 5, row 1; `ORC-SP5RLLYV7U` |  |
| Phase composition |  | 1173.15 | fcc_para + hcp_para + fccpara + hcppara; _fcc_para: Co 0.741, Cr 0.259; hcp_para: Co 0.724, Cr 0.276; fccpara: Co 0.741, Cr 0.259; hcppara: Co 0.724, Cr 0.276_ | experimental | [3] Oikawa 2002 | Table 1, p. 5, row 2; `ORC-PLSEDOHACL` |  |

### Formation (6)

Table: Formation, Co–Cr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: ΔfS298_ | 1.031 J/mol-atom/K | 298.15 | B2; _alloy: Co 0.5, Cr 0.5_ | DFT | [1] Liu 2016 | Table 4, p. 38, row 9; `ORC-HBJRP77ZUY.bec66f` |  |
| Entropy of formation; _printed: ΔfS298_ | -2.176 J/mol-atom/K | 298.15 | γ'-L12; _alloy: Co 0.75, Cr 0.25_ | DFT | [1] Liu 2016 | Table 4, p. 38, row 27; `ORC-MG3TNZV7PT.47ad3c` |  |
| Entropy of formation; _printed: ΔfS298_ | 4.662 J/mol-atom/K | 298.15 | γ'-L12; _alloy: Co 0.25, Cr 0.75_ | DFT | [1] Liu 2016 | Table 4, p. 38, row 28; `ORC-Y7PZJXNHY6.6797f4` |  |
| Gibbs energy of formation; _printed: ΔfG298_ | 16.289 kJ/mol-atom | 298.15 | B2; _alloy: Co 0.5, Cr 0.5_ | DFT | [1] Liu 2016 | Table 4, p. 38, row 9; `ORC-HBJRP77ZUY.61fa9d` |  |
| Gibbs energy of formation; _printed: ΔfG298_ | 7.123 kJ/mol-atom | 298.15 | γ'-L12; _alloy: Co 0.75, Cr 0.25_ | DFT | [1] Liu 2016 | Table 4, p. 38, row 27; `ORC-MG3TNZV7PT.31e556` |  |
| Gibbs energy of formation; _printed: ΔfG298_ | 16.69 kJ/mol-atom | 298.15 | γ'-L12; _alloy: Co 0.25, Cr 0.75_ | DFT | [1] Liu 2016 | Table 4, p. 38, row 28; `ORC-Y7PZJXNHY6.ff3a0d` |  |

### Mixing / partial (15)

Table: Mixing / partial, Co–Cr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Enthalpy of mixing; _printed: ΔHmix_ | 9.59 kJ/mol-atom | 0 | A2; _alloy: Co 0.25, Cr 0.75_ | DFT | [2] Liu 2015 | Table 4, p. 13, row 6; `ORC-52RX4KJCDS` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 9.99 kJ/mol-atom | 0 | A2; _alloy: Co 0.75, Cr 0.25_ | DFT | [2] Liu 2015 | Table 4, p. 13, row 4; `ORC-5DVIFPHSFN` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 9.59 kJ/mol-atom | 0 | A2; _alloy: Co 0.25, Cr 0.75_ | DFT | [1] Liu 2016; _cites Al11Cr2_ | Table 6, p. 40, row 12; `ORC-JOQ23RZ4JF` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 11.98 kJ/mol-atom | 0 | A2; _alloy: Co 0.5, Cr 0.5_ | DFT | [2] Liu 2015 | Table 4, p. 13, row 5; `ORC-UQKZUDGG6O` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 11.98 kJ/mol-atom | 0 | A2; _alloy: Co 0.5, Cr 0.5_ | DFT | [1] Liu 2016; _cites Al11Cr2_ | Table 6, p. 40, row 11; `ORC-VFAGMP4DJH.f7e83c` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 9.99 kJ/mol-atom | 0 | A2; _alloy: Co 0.75, Cr 0.25_ | DFT | [1] Liu 2016; _cites Al11Cr2_ | Table 6, p. 40, row 10; `ORC-VLHDYN3XNT` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 11.99 kJ/mol-atom | 0 | B2; _alloy: Co 0.5, Cr 0.5_ | DFT | [2] Liu 2015 | Table 4, p. 13, row 19; `ORC-6OYLJDF5W6` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 11.99 kJ/mol-atom | 0 | B2; _alloy: Co 0.5, Cr 0.5_ | DFT | [1] Liu 2016 | Table 8, p. 42, row 22; `ORC-CWVXPYGUEK` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | 11.99 kJ/mol-atom | 0 | B2; _alloy: Co 0.5, Cr 0.5_ | DFT | [1] Liu 2016; _cites Al11Cr2_ | Table 8, p. 42, row 6; `ORC-GAPJTWRZML` |  |
| Enthalpy of mixing; _printed: ΔmixH^SQS_ | -7.568 kJ/mol-atom |  | fcc; _alloy: Co 0.5, Cr 0.5_ | DFT | [4] Bracq 2021 | Table 1, p. 4, row 1; `ORC-4D6QTOCWEW.cd49a1` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | -5.46 kJ/mol-atom | 0 | γ; _alloy: Co 0.5, Cr 0.5_ | DFT | [1] Liu 2016 | Table 7, p. 41, row 11; `ORC-5I6MP4KN2N` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | -0.9 kJ/mol-atom | 0 | γ; _alloy: Co 0.75, Cr 0.25_ | DFT | [1] Liu 2016 | Table 7, p. 41, row 10; `ORC-BQZ45U6GCO.c1d891` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | -6.86 kJ/mol-atom | 0 | γ; _alloy: Co 0.25, Cr 0.75_ | DFT | [1] Liu 2016 | Table 7, p. 41, row 12; `ORC-TVEF5FPR33.0f9888` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | -10.48 kJ/mol-atom | 0 | γ’; _alloy: Co 0.25, Cr 0.75_ | DFT | [1] Liu 2016 | Table 9, p. 43, row 6; `ORC-I5JKIVXLI4` |  |
| Enthalpy of mixing; _printed: ΔHmix_ | -5.04 kJ/mol-atom | 0 | γ’; _alloy: Co 0.75, Cr 0.25_ | DFT | [1] Liu 2016 | Table 9, p. 43, row 9; `ORC-RUQIJPW7LX` |  |

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

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

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| gibbs energy contribution; _printed: magG Co_ | -9.917 kJ/mol | 0.1 | HCP | model | [5] Wang 2019; _cites Fernandez 1987_ [doi](https://doi.org/10.1007/bf00567107) | p. 4; `ORC-Q4L27QR5TB.a380fa` | “Using the current CALPHAD description of Co \[50\], the magnetic contribution HCP to the total Gibbs energy of the HCP Co, magG Co , is -8.531 kJ/mol at 0 K and -6.417 kJ/mol at 298.25 K compared to -9.917 kJ/mol at 0.1 K if the experimental magnetic moment is used.” |
| gibbs energy contribution; _printed: magG Co_ | -6.417 kJ/mol | 298.25 | HCP | model | [5] Wang 2019; _cites Fernandez 1987_ [doi](https://doi.org/10.1007/bf00567107) | p. 4; `ORC-Q4L27QR5TB.811a72` | “Using the current CALPHAD description of Co \[50\], the magnetic contribution HCP to the total Gibbs energy of the HCP Co, magG Co , is -8.531 kJ/mol at 0 K and -6.417 kJ/mol at 298.25 K compared to -9.917 kJ/mol at 0.1 K if the experimental magnetic moment is used.” |

### Crystal structure (3)

Table: Crystal structure, Co–Cr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Molar volume; _printed: V0_ | 11.6 Å3/atom | 298.15 | B2 CoCr; _alloy: Co 0.5, Cr 0.5_ | DFT | [1] Liu 2016 | Table 2, p. 36, row 13; `ORC-FUNVIZITEW` |  |
| Molar volume; _printed: V0_ | 10.56 Å3/atom | 298.15 | γ'-L12 Co3Cr; _alloy: Co 0.75, Cr 0.25_ | DFT | [1] Liu 2016 | Table 2, p. 36, row 29; `ORC-5Y7U5ERUWP` |  |
| Molar volume; _printed: V0_ | 11.367 Å3/atom | 298.15 | γ'-L12 Cr3Co; _alloy: Co 0.25, Cr 0.75_ | DFT | [1] Liu 2016 | Table 2, p. 36, row 30; `ORC-5Z6G66MRKW` |  |

## Sources

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

1. Xuan L. Liu, Greta Lindwall, Thomas Gheno, Zi-Kui Liu, Thermodynamic modeling of Al–Co–Cr, Al–Co–Ni, Co–Cr–Ni ternary systems towards a description for Al–Co–Cr–Ni, Calphad 52, 125-142 (2016). [doi:10.1016/j.calphad.2015.12.007](https://doi.org/10.1016/j.calphad.2015.12.007)
2. Xuan L. Liu, Thomas Gheno, Bonnie B. Lindahl, Greta Lindwall, Brian Gleeson, Zi-Kui Liu, First-Principles Calculations, Experimental Study, and Thermodynamic Modeling of the Al-Co-Cr System, PLoS ONE 10, e0121386 (2015). [doi:10.1371/journal.pone.0121386](https://doi.org/10.1371/journal.pone.0121386)
3. Katsunari Oikawa, Gao-Wu Qin, Tamio Ikeshoji, Ryosuke Kainuma, Kiyohito Ishida, Direct evidence of magnetically induced phase separation in the fcc phase and thermodynamic calculations of phase equilibria of the Co–Cr system, Acta Materialia 50, 2223-2232 (2002). [doi:10.1016/s1359-6454(01)00433-5](https://doi.org/10.1016/s1359-6454%2801%2900433-5)
4. Guillaume Bracq, Jean-Claude Crivello, Mathilde Laurent-Brocq, Jean-Marc Joubert, Ivan Guillot, What is the Enthalpy Contribution to the Stabilization of the Co–Cr–Fe–Mn–Ni Faced-centered Cubic Solid Solution?, J. Phase Equilib. Diffus. 42, 561-570 (2021). [doi:10.1007/s11669-021-00922-9](https://doi.org/10.1007/s11669-021-00922-9)
5. Peisheng Wang, Matthew C. Peters, Ursula R. Kattner, Kamal Choudhary, Gregory B. Olson, Thermodynamic analysis of the topologically close packed σ phase in the Co Cr system, Intermetallics 105, 13-20 (2019). [doi:10.1016/j.intermet.2018.11.004](https://doi.org/10.1016/j.intermet.2018.11.004)

## Please cite

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

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

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

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

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

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

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

---

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