# Co–W system

> Co–W system: 115 accepted literature values (formation 67, invariant reaction 18, mixing / partial 12, phase equilibrium 12) 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-W.html · Markdown: https://data.orchid-project.org/systems/CO-W.md

115 accepted literature values from 4 paper(s) (experimental 19, model 29, DFT 67); 10 calculated phase diagram(s). 5 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-W.json) · [CSV](https://data.orchid-project.org/systems/CO-W.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CO-W) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CO-W/CoW-05Mar.json) · [phases (10)](https://data.orchid-project.org/phases/pages/CO-W.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CO-W.html) · [Markdown](https://data.orchid-project.org/systems/CO-W.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 19 |
| model | 29 |
| DFT | 67 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 18 |
| phase transition | 6 |
| phase equilibrium | 12 |
| formation | 67 |
| mixing / partial | 12 |

## 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 |
|---|---|---|---|
| CoW-05Mar.tdb | A. Markstroem, B. Sundman, K. Frisk, J. Phase Equilib. Diffus., 26, 152-60(2005). [doi:10.1361/15477030522473](https://doi.org/10.1361/15477030522473) | `01a3c66282bd5b1d3edd50b2909d6e753d35e632f246204cf05769eab1162cad` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-05Mar.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-05Mar.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-05Mar.json) |
| CoW-05Sat.tdb | J. Sato, K. Oikawa, R. Kainuma, K. Ishida, Mater. Trans. (JIM), 46, 1199-1207(2005). [doi:10.2320/matertrans.46.1199](https://doi.org/10.2320/matertrans.46.1199) | `1f1f9784293cea69a2af547f295d8cd52024923af86f8dc1cb89225eb2305cbc` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-05Sat.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-05Sat.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-05Sat.json) |
| CoW-15Kap.tdb | B. Kaplan, A. Blomqvist, M. Selleby, S. Norgren, Calphad, 50, 59-67(2015). [doi:10.1016/j.calphad.2015.04.012](https://doi.org/10.1016/j.calphad.2015.04.012) | `200261711d9333d50308766ce0f05229524bf9c4c560b6589b6e5f74d980017f` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-15Kap.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-15Kap.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-15Kap.json) |
| CoW-17Wan.tdb | P. Wang, W. Xiong, U.R. Kattner, C.E. Campbell, E.A. Lass, O.Y. Kontsevoi, G.B. Olson, Calphad, 59, 112-30(2017). [doi:10.1016/j.calphad.2017.09.007](https://doi.org/10.1016/j.calphad.2017.09.007) | `4b8a669596d303a441ff7ea39364afbb047a3f425061812980a500b4a93e3d8a` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-17Wan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-17Wan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-17Wan.json) |
| CoW-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) | `ea38c8c1cc7a87aa30d6d7826430ef500bb3d04e3afc99b20075164937237532` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-18Cac.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-18Cac.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-18Cac.json) |
| CoW-18Liu.tdb | X. Liu, Z. Niu, Y. Lu, Y. Guo, J. Han, Y. Chen, C. Wang, Rare Met. Mater. Eng., 47, 2919-26(2018). [doi:10.1016/S1875-5372(18)30212-1](https://doi.org/10.1016/S1875-5372%2818%2930212-1) | `9597878804aaa859b31e7c8e121925a406969e5b3b8cfa6bcdac5f9202732f95` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-18Liu.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-18Liu.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-18Liu.json) |
| CoW-19Kap.tdb | B. Kaplan, Calphad, 66, 101626(2019). [doi:10.1016/j.calphad.2019.05.003](https://doi.org/10.1016/j.calphad.2019.05.003) | `b705eaf27f721bc951c213045f31412ef23a01762147627b3b337bc3999fd191` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-19Kap.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-19Kap.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-19Kap.json) |
| CoW-19Wan.tdb | P. Wang, O.Y. Kontsevoi, G.B. Olson, J. Mater. Sci., 54, 10261-69(2019). [doi:10.1007/s10853-019-03616-3](https://doi.org/10.1007/s10853-019-03616-3) | `9fc3705c1fb528005e9f6415dce63708b3a5132374ed12530292df00e8f024cb` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-19Wan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-19Wan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-19Wan.json) |
| CoW-85Gab.tdb | A. Gabriel, H.L. Lukas, C.H. Allibert, I. Ansara, Z. Metallkd., 76, 589-95(1985). [doi:10.1515/ijmr-1985-760902](https://doi.org/10.1515/ijmr-1985-760902) | `e50d980889fc6e3e61b8a1a269a99d723dfa55bf047283ce978f9c4b81170890` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-85Gab.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-85Gab.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-85Gab.json) |
| CoW-89Fer-LB.tdb | A. Fernandez Guillermet, Metall. Trans. A, 20A, 935-56(1989). [doi:10.1007/BF02651660](https://doi.org/10.1007/BF02651660) | `2723d34dfa7f67d26761ab2c54760d4624ba467624d3d04148790adccb7e87b5` | [viewer](https://orchid-project.org/phase-diagrams/#CO-W/CoW-89Fer-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoW-89Fer-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoW-89Fer-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CoW-05Mar.tdb | 1965.1 | LIQUID (x(W) 0.32309) + MU_D85 (x(W) 0.43871) + BCC_A2 (x(W) 0.98246) |
| CoW-05Mar.tdb | 1744.35 | FCC_A1 (x(W) 0.17492) + LIQUID (x(W) 0.20609) + MU_D85 (x(W) 0.42483) |
| CoW-05Mar.tdb | 1366.41 | FCC_A1 (x(W) 0.13324) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.43171) |
| CoW-05Mar.tdb | 1366.41 | FCC_A1 (x(W) 0.1332) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.43172) |
| CoW-05Mar.tdb | 1181.27 | FCC_A1 (x(W) 0.02754) + FCC_A1#2 (x(W) 0.05324) + CO3W_D019 (x(W) 0.25) |
| CoW-05Mar.tdb | 693.71 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.400e-4) + CO3W_D019 (x(W) 0.25) |
| CoW-05Mar.tdb | 693.71 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.400e-4) + CO3W_D019 (x(W) 0.25) |
| CoW-05Mar.tdb | 500.83 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.46142) + BCC_A2 (x(W) 1) |
| CoW-05Mar.tdb | 500.83 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.46142) + BCC_A2 (x(W) 1) |
| CoW-05Mar.tdb | 500.83 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.46142) + BCC_A2 (x(W) 1) |
| CoW-05Mar.tdb | 407.37 | HCP_A3 (x(W) 0) + CO3W_D019 (x(W) 0.25) + BCC_A2 (x(W) 1) |
| CoW-05Sat.tdb | 1962.09 | LIQUID (x(W) 0.3219) + MU_D85 (x(W) 0.48459) + BCC_A2 (x(W) 0.97638) |
| CoW-05Sat.tdb | 1742.97 | FCC_A1 (x(W) 0.17298) + LIQUID (x(W) 0.20596) + MU_D85 (x(W) 0.42938) |
| CoW-05Sat.tdb | 1366.27 | FCC_A1 (x(W) 0.13476) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.4355) |
| CoW-05Sat.tdb | 1170.46 | FCC_A1#2 (x(W) 0.02407) + FCC_A1 (x(W) 0.05304) + CO3W_D019 (x(W) 0.25) |
| CoW-05Sat.tdb | 718.77 | FCC_A1 (x(W) 6.400e-4) + HCP_A3 (x(W) 0.00284) + CO3W_D019 (x(W) 0.25) |
| CoW-05Sat.tdb | 718.77 | FCC_A1 (x(W) 6.400e-4) + HCP_A3 (x(W) 0.00283) + CO3W_D019 (x(W) 0.25) |
| CoW-15Kap.tdb | 1965.1 | LIQUID (x(W) 0.32309) + MU_D85 (x(W) 0.43871) + BCC_A2 (x(W) 0.98246) |
| CoW-15Kap.tdb | 1744.35 | FCC_A1 (x(W) 0.17492) + LIQUID (x(W) 0.20609) + MU_D85 (x(W) 0.42483) |
| CoW-15Kap.tdb | 1366.41 | FCC_A1 (x(W) 0.1332) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.43172) |
| CoW-15Kap.tdb | 1366.41 | FCC_A1 (x(W) 0.13324) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.43171) |
| CoW-15Kap.tdb | 1181.27 | FCC_A1 (x(W) 0.02754) + FCC_A1#2 (x(W) 0.05324) + CO3W_D019 (x(W) 0.25) |
| CoW-15Kap.tdb | 693.71 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.400e-4) + CO3W_D019 (x(W) 0.25) |
| CoW-15Kap.tdb | 693.71 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.400e-4) + CO3W_D019 (x(W) 0.25) |
| CoW-15Kap.tdb | 693.71 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.400e-4) + CO3W_D019 (x(W) 0.25) |
| CoW-15Kap.tdb | 553.78 | MU_D85 (x(W) 0.46131) + R_PHASE (x(W) 0.48431) + BCC_A2 (x(W) 1) |
| CoW-15Kap.tdb | 553.78 | MU_D85 (x(W) 0.46131) + R_PHASE (x(W) 0.48434) + BCC_A2 (x(W) 1) |
| CoW-15Kap.tdb | 550.66 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.46129) + R_PHASE (x(W) 0.4835) |
| CoW-15Kap.tdb | 550.66 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.46129) + R_PHASE (x(W) 0.48354) |
| CoW-15Kap.tdb | 465.18 | HCP_A3 (x(W) 0) + CO3W_D019 (x(W) 0.25) + R_PHASE (x(W) 0.48547) |
| CoW-15Kap.tdb | 465.18 | HCP_A3 (x(W) 0) + CO3W_D019 (x(W) 0.25) + R_PHASE (x(W) 0.48548) |
| CoW-15Kap.tdb | 465.18 | HCP_A3 (x(W) 0) + CO3W_D019 (x(W) 0.25) + R_PHASE (x(W) 0.48549) |
| CoW-17Wan.tdb | 1960.86 | LIQUID (x(W) 0.32471) + MU_D85 (x(W) 0.48839) + BCC_A2 (x(W) 0.98583) |
| CoW-17Wan.tdb | 1749.3 | FCC_A1 (x(W) 0.17199) + LIQUID (x(W) 0.20606) + MU_D85 (x(W) 0.42482) |
| CoW-17Wan.tdb | 1365.6 | FCC_A1 (x(W) 0.13335) + CO3W_D019 (x(W) 0.25401) + MU_D85 (x(W) 0.43509) |
| CoW-17Wan.tdb | 1165.83 | FCC_A1 (x(W) 0.02395) + FCC_A1#2 (x(W) 0.05106) + CO3W_D019 (x(W) 0.22969) |
| CoW-17Wan.tdb | 694.5 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 5.000e-5) + CO3W_D019 (x(W) 0.24755) |
| CoW-18Cac.tdb | 2021.78 | LIQUID (x(W) 0.33437) + MU_D85 (x(W) 0.48383) + BCC_A2 (x(W) 0.98123) |
| CoW-18Cac.tdb | 1741.56 | FCC_A1 (x(W) 0.17859) + LIQUID (x(W) 0.21108) + MU_D85 (x(W) 0.45099) |
| CoW-18Cac.tdb | 1419.62 | FCC_A1 (x(W) 0.14744) + CO3W_D019 (x(W) 0.2683) + MU_D85 (x(W) 0.45047) |
| CoW-18Cac.tdb | 693.67 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.400e-4) + CO3W_D019 (x(W) 0.25044) |
| CoW-18Cac.tdb | 579.59 | MU_D85 (x(W) 0.47525) + R_PHASE (x(W) 0.48314) + BCC_A2 (x(W) 1) |
| CoW-18Cac.tdb | 578.96 | CO3W_D019 (x(W) 0.25038) + MU_D85 (x(W) 0.47438) + R_PHASE (x(W) 0.48262) |
| CoW-18Cac.tdb | 473.27 | HCP_A3 (x(W) 0) + CO3W_D019 (x(W) 0.25005) + R_PHASE (x(W) 0.48509) |
| CoW-18Liu.tdb | 1962.47 | LIQUID (x(W) 0.32258) + MU_D85 (x(W) 0.4387) + BCC_A2 (x(W) 0.98252) |
| CoW-18Liu.tdb | 1744.13 | FCC_A1 (x(W) 0.17521) + LIQUID (x(W) 0.20649) + MU_D85 (x(W) 0.42569) |
| CoW-18Liu.tdb | 1366.45 | FCC_A1 (x(W) 0.13298) + CO3W_D019 (x(W) 0.23288) + MU_D85 (x(W) 0.43562) |
| CoW-18Liu.tdb | 1184.08 | FCC_A1 (x(W) 0.02769) + FCC_A1#2 (x(W) 0.05201) + CO3W_D019 (x(W) 0.23099) |
| CoW-18Liu.tdb | 693.63 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.500e-4) + CO3W_D019 (x(W) 0.24456) |
| CoW-18Liu.tdb | 693.63 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.500e-4) + CO3W_D019 (x(W) 0.24456) |
| CoW-18Liu.tdb | 458.03 | HCP_A3 (x(W) 0) + CO3W_D019 (x(W) 0.2495) + MU_D85 (x(W) 0.46152) |
| CoW-18Liu.tdb | 402.05 | HCP_A3 (x(W) 0) + MU_D85 (x(W) 0.46154) + BCC_A2 (x(W) 1) |
| CoW-18Liu.tdb | 402.05 | HCP_A3 (x(W) 0) + MU_D85 (x(W) 0.46154) + BCC_A2 (x(W) 1) |
| CoW-19Kap.tdb | 1954.99 | LIQUID (x(W) 0.32112) + MU_D85 (x(W) 0.44031) + BCC_A2 (x(W) 0.98268) |
| CoW-19Kap.tdb | 1745.12 | FCC_A1 (x(W) 0.17388) + LIQUID (x(W) 0.20468) + MU_D85 (x(W) 0.42604) |
| CoW-19Kap.tdb | 1380.02 | FCC_A1 (x(W) 0.12796) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.42865) |
| CoW-19Kap.tdb | 1209.27 | FCC_A1#2 (x(W) 0.02885) + FCC_A1 (x(W) 0.04244) + CO3W_D019 (x(W) 0.25) |
| CoW-19Kap.tdb | 694.62 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 4.000e-5) + CO3W_D019 (x(W) 0.25) |
| CoW-19Wan.tdb | 1961.81 | LIQUID (x(W) 0.32405) + MU_D85 (x(W) 0.49492) + BCC_A2 (x(W) 0.98593) |
| CoW-19Wan.tdb | 1749.38 | FCC_A1 (x(W) 0.17103) + LIQUID (x(W) 0.20558) + MU_D85 (x(W) 0.43292) |
| CoW-19Wan.tdb | 1749.38 | FCC_4SL (x(W) 0.17103) + LIQUID (x(W) 0.20558) + MU_D85 (x(W) 0.43292) |
| CoW-19Wan.tdb | 1366.05 | FCC_4SL (x(W) 0.13345) + CO3W_D019 (x(W) 0.25068) + MU_D85 (x(W) 0.43475) |
| CoW-19Wan.tdb | 1366.05 | FCC_A1 (x(W) 0.13345) + CO3W_D019 (x(W) 0.25068) + MU_D85 (x(W) 0.43475) |
| CoW-19Wan.tdb | 1163.48 | FCC_4SL (x(W) 0.0218) + FCC_4SL#2 (x(W) 0.05247) + CO3W_D019 (x(W) 0.22298) |
| CoW-19Wan.tdb | 1163.48 | FCC_A1 (x(W) 0.0218) + FCC_4SL (x(W) 0.05247) + CO3W_D019 (x(W) 0.22298) |
| CoW-19Wan.tdb | 1163.48 | FCC_4SL (x(W) 0.0218) + FCC_A1 (x(W) 0.05247) + CO3W_D019 (x(W) 0.22298) |
| CoW-19Wan.tdb | 694.23 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 8.000e-5) + CO3W_D019 (x(W) 0.24617) |
| CoW-19Wan.tdb | 694.23 | HCP_A3 (x(W) 0) + FCC_4SL (x(W) 8.000e-5) + CO3W_D019 (x(W) 0.24618) |
| CoW-85Gab.tdb | 1986.19 | LIQUID (x(W) 0.28826) + CO7W6_D85 (x(W) 0.46154) + BCC_A2 (x(W) 0.97789) |
| CoW-85Gab.tdb | 1986.19 | LIQUID (x(W) 0.2883) + CO7W6_D85 (x(W) 0.46154) + BCC_A2 (x(W) 0.97788) |
| CoW-85Gab.tdb | 1679.34 | FCC_A1 (x(W) 0.10144) + LIQUID (x(W) 0.15403) + CO7W6_D85 (x(W) 0.46154) |
| CoW-85Gab.tdb | 1679.34 | FCC_A1 (x(W) 0.10132) + LIQUID (x(W) 0.15383) + CO7W6_D85 (x(W) 0.46154) |
| CoW-85Gab.tdb | 697.41 | FCC_A1 (x(W) 0.01798) + HCP_A3 (x(W) 0.0184) + CO7W6_D85 (x(W) 0.46154) |
| CoW-89Fer-LB.tdb | 1962.35 | LIQUID (x(W) 0.33489) + MU_D85 (x(W) 0.44384) + BCC_A2 (x(W) 0.98385) |
| CoW-89Fer-LB.tdb | 1744.39 | FCC_A1 (x(W) 0.17418) + LIQUID (x(W) 0.20215) + MU_D85 (x(W) 0.42408) |
| CoW-89Fer-LB.tdb | 1366.41 | FCC_A1 (x(W) 0.13149) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.41701) |
| CoW-89Fer-LB.tdb | 1366.41 | FCC_A1 (x(W) 0.13146) + CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.41701) |
| CoW-89Fer-LB.tdb | 1170.85 | FCC_A1 (x(W) 0.02892) + FCC_A1#2 (x(W) 0.05564) + CO3W_D019 (x(W) 0.25) |
| CoW-89Fer-LB.tdb | 693.26 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.900e-4) + CO3W_D019 (x(W) 0.25) |
| CoW-89Fer-LB.tdb | 693.26 | HCP_A3 (x(W) 0) + FCC_A1 (x(W) 1.800e-4) + CO3W_D019 (x(W) 0.25) |
| CoW-89Fer-LB.tdb | 508.92 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.45695) + BCC_A2 (x(W) 1) |
| CoW-89Fer-LB.tdb | 508.92 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.45695) + BCC_A2 (x(W) 1) |
| CoW-89Fer-LB.tdb | 508.92 | CO3W_D019 (x(W) 0.25) + MU_D85 (x(W) 0.45696) + BCC_A2 (x(W) 1) |
| CoW-89Fer-LB.tdb | 450.11 | HCP_A3 (x(W) 0) + CO3W_D019 (x(W) 0.25) + BCC_A2 (x(W) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CO/CO-W.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CO/CO-W.json) · [CALPHAD hull CoW-05Mar](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-05Mar.json) · [CALPHAD hull CoW-05Sat](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-05Sat.json) · [CALPHAD hull CoW-15Kap](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-15Kap.json) · [CALPHAD hull CoW-17Wan](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-17Wan.json) · [CALPHAD hull CoW-18Cac](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-18Cac.json) · [CALPHAD hull CoW-18Liu](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-18Liu.json) · [CALPHAD hull CoW-19Wan](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-19Wan.json) · [CALPHAD hull CoW-85Gab](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-85Gab.json) · [CALPHAD hull CoW-89Fer-LB](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-W--CoW-89Fer-LB.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Co–W system (18)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1965.1 | Liq+(W)+ => µ |  | model | [1] Wang 2017; _cites ref. 67_ | Table 11, p. 53, row 2; `ORC-UQVYOI4KKY` |  |
| 1962.1 | Liq+(W)+ => µ |  | model | [1] Wang 2017; _cites ref. 19_ | Table 11, p. 53, row 3; `ORC-NG2T7A2TZ2` |  |
| 1962 | Liq+(W)+ => µ |  | model | [1] Wang 2017; _cites ref. 68_ | Table 11, p. 53, row 4; `ORC-PDS3O6AGPU` |  |
| 1960.8 | Liq+(W)+ => µ |  | model | [1] Wang 2017 | Table 11, p. 53, row 1; `ORC-YY2QGU6ZKK` |  |
| 1785.6 | eutectic: Liq => (αCo)+µ |  | model | [1] Wang 2017; _cites ref. 67_ | Table 11, p. 53, row 10; `ORC-6K4UXAL4BL` |  |
| 1749.3 | eutectic: Liq => (αCo)+µ |  | model | [1] Wang 2017 | Table 11, p. 53, row 9; `ORC-33YZSCVH5Z` |  |
| 1744 | eutectic: Liq => (αCo)+µ |  | model | [1] Wang 2017; _cites ref. 68_ | Table 11, p. 53, row 12; `ORC-IXZE7JJW5D` |  |
| 1743 | eutectic: Liq => (αCo)+µ |  | model | [1] Wang 2017; _cites ref. 19_ | Table 11, p. 53, row 11; `ORC-3UYQNFTYRN` |  |
| 1366.3 | µ+ (αCo) => Co3W | Co3W: W 0.25 | model | [1] Wang 2017; _cites ref. 19_ | Table 11, p. 53, row 15; `ORC-WH7VW7S3UR` |  |
| 1366 | µ+ (αCo) => Co3W | Co3W: W 0.25 | model | [1] Wang 2017; _cites ref. 68_ | Table 11, p. 53, row 16; `ORC-Z2A7TA5LAZ` |  |
| 1365.6 | µ+ (αCo) => Co3W | Co3W: W 0.25 | model | [1] Wang 2017 | Table 11, p. 53, row 13; `ORC-FYFQKUOB3C` |  |
| 1333.7 | µ+ (αCo) => Co3W | Co3W: W 0.25 | model | [1] Wang 2017; _cites ref. 67_ | Table 11, p. 53, row 14; `ORC-7MHH2K6I2E` |  |
| 1170.5 | (αCo)pm => (αCo)fm + Co3W | Co3W: W 0.25 | model | [1] Wang 2017; _cites ref. 19_ | Table 11, p. 53, row 19; `ORC-SHSS2TUGHN` |  |
| 1165.8 | (αCo)pm => (αCo)fm + Co3W | Co3W: W 0.25 | model | [1] Wang 2017 | Table 11, p. 53, row 17; `ORC-ERFM5DS7QO` |  |
| 1159.8 | (αCo)pm => (αCo)fm + Co3W | Co3W: W 0.25 | model | [1] Wang 2017; _cites ref. 67_ | Table 11, p. 53, row 18; `ORC-W2FJB3SVUS` |  |
| 718.8 | (αCo) => (εCo) + Co3W | Co3W: W 0.25 | model | [1] Wang 2017; _cites ref. 19_ | Table 11, p. 53, row 22; `ORC-G2VAONOV2W` |  |
| 694.5 | (αCo) => (εCo) + Co3W | Co3W: W 0.25 | model | [1] Wang 2017 | Table 11, p. 53, row 20; `ORC-ESZSZXDT5E` |  |
| 693.3 | (αCo) => (εCo) + Co3W | Co3W: W 0.25 | model | [1] Wang 2017; _cites ref. 67_ | Table 11, p. 53, row 21; `ORC-XRYHRJHMYA` |  |

## 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–W system (67)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Co3W |  | -7.94 kJ/mol-atom | 0 | DFT |  |  | [1] Wang 2017; _cites ref. 22_ | Table 1, p. 36, row 21; `ORC-V4KTMIW5AF` |  |
| Co3W |  | -7.81 kJ/mol-atom | 0 | DFT |  |  | [1] Wang 2017; _cites ref. 23_ | Table 1, p. 36, row 20; `ORC-YWWPWQ6XO5` |  |
| Co3W |  | -7.72 kJ/mol-atom | 0 | DFT |  |  | [1] Wang 2017; _cites ref. 21_ | Table 1, p. 36, row 19; `ORC-GMIYN6WQUP` |  |
| μ 11111 |  | 11.322 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 1; `ORC-OI7TLXXHTB.0f7dd6` |  |
| μ 11111 |  | 42.638 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 1; `ORC-OI7TLXXHTB.3099c8` |  |
| μ 11112 |  | 49.921 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 2; `ORC-G4V3A5K2RN.220550` |  |
| μ 11112 |  | 51.575 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 2; `ORC-G4V3A5K2RN.8449d9` |  |
| μ 11121 |  | 15.029 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 3; `ORC-JC7ZBSKK37.bea8d8` |  |
| μ 11121 |  | 25.112 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 3; `ORC-JC7ZBSKK37.8a0d42` |  |
| μ 11122 |  | 58.706 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 4; `ORC-U7LZ2AOYXH.97af49` |  |
| μ 11122 |  | 62.598 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 4; `ORC-U7LZ2AOYXH.27c7f4` |  |
| μ 11211 |  | 8.307 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 5; `ORC-J7KUVEJOXD.5f4ec7` |  |
| μ 11211 |  | 22.257 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 5; `ORC-J7KUVEJOXD.512f7c` |  |
| μ 11212 |  | 37.562 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 6; `ORC-52B347X27R.c51bd2` |  |
| μ 11212 |  | 38.804 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 6; `ORC-52B347X27R.4a31fe` |  |
| μ 11221 |  | 8.801 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 7; `ORC-S7ZH7V5336.6e70e0` |  |
| μ 11221 |  | 10.632 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 7; `ORC-S7ZH7V5336.a4a37d` |  |
| μ 11222 |  | 44.291 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 8; `ORC-NLSM2FRNK3.72beb8` |  |
| μ 11222 |  | 46.082 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 8; `ORC-NLSM2FRNK3.3b6381` |  |
| μ 12111 |  | 12.118 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 9; `ORC-F6JQGABFQR.8b4c79` |  |
| μ 12111 |  | 30.262 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 9; `ORC-F6JQGABFQR.43f381` |  |
| μ 12112 |  | 45.561 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 10; `ORC-KX5JS6OXNE.f7697e` |  |
| μ 12112 |  | 46.225 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 10; `ORC-KX5JS6OXNE.0f56fa` |  |
| μ 12121 |  | 7.663 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 11; `ORC-HPXFKJQW5K.1baee8` |  |
| μ 12121 |  | 12.825 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 11; `ORC-HPXFKJQW5K.32d969` |  |
| μ 12122 |  | 41.064 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 12; `ORC-Q272UZ7JBZ.737459` |  |
| μ 12122 |  | 41.351 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 12; `ORC-Q272UZ7JBZ.70b06e` |  |
| μ 12211 |  | 1.853 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 13; `ORC-ONZIYU47JE.5309b3` |  |
| μ 12211 |  | 6.608 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 13; `ORC-ONZIYU47JE.c6322b` |  |
| μ 12212 |  | 35.134 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 14; `ORC-XMKNLIL3KB.a512cb` |  |
| μ 12212 |  | 36.811 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 14; `ORC-XMKNLIL3KB.4381ad` |  |
| μ 12221 |  | -3.927 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 15; `ORC-ZKLP43DQSS.c6f69b` |  |
| μ 12221 |  | -3.512 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 15; `ORC-ZKLP43DQSS.a2e1c1` |  |
| μ 12222 |  | 27.98 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 16; `ORC-57A5NYXB7H.4145ba` |  |
| μ 12222 |  | 27.989 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 16; `ORC-57A5NYXB7H.f68e7b` |  |
| μ 21111 |  | 16.878 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 17; `ORC-VSNZGVFS36.2b4a0f` |  |
| μ 21111 |  | 37.159 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 17; `ORC-VSNZGVFS36.8346fa` |  |
| μ 21112 |  | 58.319 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 18; `ORC-WNTBZWHR4Q.1696d3` |  |
| μ 21112 |  | 59.114 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 18; `ORC-WNTBZWHR4Q.d48b05` |  |
| μ 21121 |  | 14.252 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 19; `ORC-XGB24AMSZF.521470` |  |
| μ 21121 |  | 18.619 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 19; `ORC-XGB24AMSZF.d153e9` |  |
| μ 21122 |  | 68.081 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 20; `ORC-YXZY2QLFTD.520a9c` |  |
| μ 21122 |  | 69.959 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 20; `ORC-YXZY2QLFTD.19e6be` |  |
| μ 21211 |  | 13.709 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 21; `ORC-CKPGZ5GMAQ.8b9a5d` |  |
| μ 21211 |  | 27.967 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 21; `ORC-CKPGZ5GMAQ.3411bd` |  |
| μ 21212 |  | 41.007 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 22; `ORC-UORWE4SGAZ.3b3f9d` |  |
| μ 21212 |  | 41.959 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 22; `ORC-UORWE4SGAZ.33934a` |  |
| μ 21221 |  | 10.545 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 23; `ORC-XR4OUTJNSM.96c4b2` |  |
| μ 21221 |  | 13.694 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 23; `ORC-XR4OUTJNSM.639024` |  |
| μ 21222 |  | 47.544 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 24; `ORC-VOVE3ABK6C.d842ca` |  |
| μ 21222 |  | 48.877 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 24; `ORC-VOVE3ABK6C.3c7992` |  |
| μ 22111 |  | 15.081 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 25; `ORC-FEDZUDBDHE.7762f5` |  |
| μ 22111 |  | 24.043 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 25; `ORC-FEDZUDBDHE.0250de` |  |
| μ 22112 |  | 55.198 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 26; `ORC-FNMIFZJRGM.3f4a8f` |  |
| μ 22112 |  | 55.637 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 26; `ORC-FNMIFZJRGM.d0888d` |  |
| μ 22121 |  | 4.816 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 27; `ORC-I6FYC5QA25.7b5f68` |  |
| μ 22121 |  | 5.102 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 27; `ORC-I6FYC5QA25.c00715` |  |
| μ 22122 |  | 50.411 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 28; `ORC-YNROLK5PQ2.efa31b` |  |
| μ 22122 |  | 50.421 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 28; `ORC-YNROLK5PQ2.0a20a4` |  |
| μ 22211 |  | 5.866 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 29; `ORC-HI5HKMROH7.0d3d95` |  |
| μ 22211 |  | 9.684 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 29; `ORC-HI5HKMROH7.503a30` |  |
| μ 22212 |  | 37.736 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 30; `ORC-5EFOI7RDRC.e954f4` |  |
| μ 22212 |  | 39.653 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 30; `ORC-5EFOI7RDRC.40f2e5` |  |
| μ 22221 |  | -4.446 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 31; `ORC-2567QM6TTN.42e5e1` |  |
| μ 22221 |  | -4.415 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 31; `ORC-2567QM6TTN.2fd01e` |  |
| μ 22222 |  | 33.344 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 32; `ORC-3TCTD4GDHH.04603d` |  |
| μ 22222 |  | 33.353 kJ/mol (basis unstated) | 0 | DFT |  |  | [2] Wang 2019 | Table 2, p. 5, row 32; `ORC-3TCTD4GDHH.7a01a2` |  |

## Other properties

### Phase transition (6)

Table: Phase transition, Co–W system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1396 K | 1396 | magnetic | experimental | [3] Guillermet 1989 | p. 16; `ORC-4I6IVG3UJU` | “Since C and W decrease the Curie temperature of fcc Co (which is 1396 KU9\]), the fcc phase in isothermal sections of the Co-W-C phase diagram corresponding to T \< 1396 K will show a ferromagnetic state at the Co-rich corner, but paramagnetic states at sufficiently large C or W contents.” |
| Phase transition | 1582 K | 1582 | hcp + liq. + /x | model | [3] Guillermet 1989 | p. 7; `ORC-X3XQL52R2N` | “The representative value Te/Ty = 0.93 was selected in the present work and combined with the melting point of hcp Co ~91 to estimate Te = 1582 K for the hcp + liq. + /x equilibrium.” |
| Phase transition | 1768 K | 1768 | Liq => (αCo) | model | [1] Wang 2017; _cites ref. 68_ | Table 11, p. 53, row 8; `ORC-223ZRH4LOY` |  |
| Phase transition | 1779.5 K | 1779.5 | Liq => (αCo) | model | [1] Wang 2017 | Table 11, p. 53, row 5; `ORC-TNB2FBEC4M` |  |
| Phase transition | 1782.6 K | 1782.6 | Liq => (αCo) | model | [1] Wang 2017; _cites ref. 19_ | Table 11, p. 53, row 7; `ORC-FZMJKSIFOT` |  |
| Phase transition | 1813.6 K | 1813.6 | Liq => (αCo) | model | [1] Wang 2017; _cites ref. 67_ | Table 11, p. 53, row 6; `ORC-KJO66AR7VU` |  |

### Phase equilibrium (12)

Table: Phase equilibrium, Co–W system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  | 1173 | αCoferro + χ; _αCoferro: Co 0.9755, W 0.0245; χ: Co 0.764, W 0.236_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 6; `ORC-4GMK2U2ZLZ` |  |
| Phase composition |  | 1173 | μ + W; _μ: Co 0.529, W 0.471; W: Co 0.027, W 0.973_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 11; `ORC-7ZXNXE53MX` |  |
| Phase composition |  | 1183 | αCoferro + αCopara; _αCoferro: Co 0.974, W 0.026; αCopara: Co 0.958, W 0.042_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 12; `ORC-Y47PSUCDOA` |  |
| Phase composition |  | 1183 | αCopara + χ; _αCopara: Co 0.941, W 0.059; χ: Co 0.776, W 0.224_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 5; `ORC-HL5LY3KBW4` |  |
| Phase composition |  | 1273 | αCopara + χ; _αCopara: Co 0.909, W 0.091; χ: Co 0.775, W 0.225_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 4; `ORC-F6JWEFJOTV` |  |
| Phase composition |  | 1373 | αCopara + μ; _αCopara: Co 0.864, W 0.136; μ: Co 0.575, W 0.425_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 3; `ORC-BX7POB7MTB` |  |
| Phase composition |  | 1373 | μ + W; _μ: Co 0.524, W 0.476; W: Co 0.023, W 0.977_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 10; `ORC-54UEQLR52I` |  |
| Phase composition |  | 1473 | αCopara + μ; _αCopara: Co 0.854, W 0.146; μ: Co 0.569, W 0.431_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 2; `ORC-AKJBIXV25U` |  |
| Phase composition |  | 1473 | μ + W; _μ: Co 0.515, W 0.485; W: Co 0.023, W 0.977_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 9; `ORC-43NCRXAMDT` |  |
| Phase composition |  | 1573 | μ + W; _μ: Co 0.517, W 0.483; W: Co 0.021, W 0.979_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 8; `ORC-43HIQZKA3V` |  |
| Phase composition |  | 1623 | αCopara + μ; _αCopara: Co 0.843, W 0.157; μ: Co 0.571, W 0.429_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 1; `ORC-ZPM4QZFZQP` |  |
| Phase composition |  | 1623 | μ + W; _μ: Co 0.515, W 0.485; W: Co 0.024, W 0.976_ | experimental | [4] Sato 2005 | Table 1, p. 3, row 7; `ORC-SP5P57W3IF` |  |

### Mixing / partial (12)

Table: Mixing / partial, Co–W system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Gibbs energy of mixing; _printed: ΔG^M_ | -0.869 kJ/mol (basis unstated) | 1200 | fcc; _alloy: Co 0.95, W 0.05_ | model | [3] Guillermet 1989 | Table III, p. 11, row 6; `ORC-A3ZATKRCKM.119668` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.178 kJ/mol (basis unstated) ± 0.318 | 1200 | fcc; _alloy: Co 0.95, W 0.05_ | experimental | [3] Guillermet 1989; _cites Rezukhina 1976_ [doi](https://doi.org/10.1016/0021-9614%2876%2990023-9) | Table III, p. 11, row 5; `ORC-OI5GVURH5M.3b2a92` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -0.866 kJ/mol (basis unstated) ± 0.226 | 1200 | fcc; _alloy: Co 0.97, W 0.03_ | experimental | [3] Guillermet 1989; _cites Rezukhina 1976_ [doi](https://doi.org/10.1016/0021-9614%2876%2990023-9) | Table III, p. 11, row 1; `ORC-OY7HXVDK3P.5b9aeb` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -0.597 kJ/mol (basis unstated) | 1200 | fcc; _alloy: Co 0.97, W 0.03_ | model | [3] Guillermet 1989 | Table III, p. 11, row 2; `ORC-V7KVUMRFK4.2ea7f8` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.459 kJ/mol (basis unstated) ± 0.427 | 1300 | fcc; _alloy: Co 0.93, W 0.07_ | experimental | [3] Guillermet 1989; _cites Rezukhina 1976_ [doi](https://doi.org/10.1016/0021-9614%2876%2990023-9) | Table III, p. 11, row 9; `ORC-CWF5BOVOXI.ac2741` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.605 kJ/mol (basis unstated) | 1300 | fcc; _alloy: Co 0.93, W 0.07_ | model | [3] Guillermet 1989 | Table III, p. 11, row 10; `ORC-HVQS6N5QVA.69e222` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.034 kJ/mol (basis unstated) | 1350 | fcc; _alloy: Co 0.97, W 0.03_ | model | [3] Guillermet 1989 | Table III, p. 11, row 4; `ORC-4CWRGDCFIY.308057` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.819 kJ/mol (basis unstated) | 1350 | fcc; _alloy: Co 0.93, W 0.07_ | model | [3] Guillermet 1989 | Table III, p. 11, row 12; `ORC-MWUVFPVS4B.0c313c` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.472 kJ/mol (basis unstated) | 1350 | fcc; _alloy: Co 0.95, W 0.05_ | model | [3] Guillermet 1989 | Table III, p. 11, row 8; `ORC-QUEZV7PMKL.4fd1bf` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.28 kJ/mol (basis unstated) ± 0.337 | 1350 | fcc; _alloy: Co 0.95, W 0.05_ | experimental | [3] Guillermet 1989; _cites Rezukhina 1976_ [doi](https://doi.org/10.1016/0021-9614%2876%2990023-9) | Table III, p. 11, row 7; `ORC-VHX6GMMSGM.10fb72` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -1.498 kJ/mol (basis unstated) ± 0.435 | 1350 | fcc; _alloy: Co 0.93, W 0.07_ | experimental | [3] Guillermet 1989; _cites Rezukhina 1976_ [doi](https://doi.org/10.1016/0021-9614%2876%2990023-9) | Table III, p. 11, row 11; `ORC-YOJB4D7DY3.a30c8d` |  |
| Gibbs energy of mixing; _printed: ΔG^M_ | -0.941 kJ/mol (basis unstated) ± 0.238 | 1350 | fcc; _alloy: Co 0.97, W 0.03_ | experimental | [3] Guillermet 1989; _cites Rezukhina 1976_ [doi](https://doi.org/10.1016/0021-9614%2876%2990023-9) | Table III, p. 11, row 3; `ORC-ZW4FB7HMVM.00a81f` |  |

## Sources

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

1. Peisheng Wang, Wei Xiong, Ursula R. Kattner, Carelyn E. Campbell, Eric A. Lass, Oleg Y. Kontsevoi et al., Thermodynamic re-assessment of the Al-Co-W system, Calphad 59, 112-130 (2017). [doi:10.1016/j.calphad.2017.09.007](https://doi.org/10.1016/j.calphad.2017.09.007)
2. Peisheng Wang, Oleg Y. Kontsevoi, Gregory B. Olson, Thermodynamic analysis of the Co–W system, J Mater Sci 54, 10261-10269 (2019). [doi:10.1007/s10853-019-03616-3](https://doi.org/10.1007/s10853-019-03616-3)
3. Armando Fernández Guillermet, Thermodynamic properties of the Co-W-C system, Metall Trans A 20, 935-956 (1989). [doi:10.1007/bf02651660](https://doi.org/10.1007/bf02651660)
4. Jun Sato, Katsunari Oikawa, Ryosuke Kainuma, Kiyohito Ishida, Experimental Verification of Magnetically Induced Phase Separation in &amp;alpha;Co Phase and Thermodynamic Calculations of Phase Equilibria in the Co&amp;ndash;W System, Mater. Trans. 46, 1199-1207 (2005). [doi:10.2320/matertrans.46.1199](https://doi.org/10.2320/matertrans.46.1199)

## 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/).