# Fe–Mn system > Fe–Mn system: 31 accepted literature values (invariant reaction 22, formation 6, mixing / partial 3) and 7 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/FE-MN.html · Markdown: https://data.orchid-project.org/systems/FE-MN.md 31 accepted literature values from 6 paper(s) (experimental 8, model 20, DFT 3); 7 calculated phase diagram(s). 1 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/FE-MN.json) · [CSV](https://data.orchid-project.org/systems/FE-MN.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#FE-MN) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-04Wit.json) · [phases (9)](https://data.orchid-project.org/phases/pages/FE-MN.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/FE-MN.html) · [Markdown](https://data.orchid-project.org/systems/FE-MN.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 8 | | model | 20 | | DFT | 3 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 22 | | formation | 6 | | mixing / partial | 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 | |---|---|---|---| | FeMn-04Wit.tdb | V.T. Witusiewicz, F. Sommer, E.J. Mittemeijer, J. Phase Equilib., 25, 346-54(2004). [doi:10.1361/15477030420115](https://doi.org/10.1361/15477030420115) | `df83d83606098227a3c4ec8e0ae81239ccda189f63af5f7ee1886a8a2b90d8c7` | [viewer](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-04Wit.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeMn-04Wit.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeMn-04Wit.json) | | FeMn-19Big-3g.tdb | S. Bigdeli, M. Selleby, Calphad, 64, 185-95(2019). [doi:10.1016/j.calphad.2018.11.011](https://doi.org/10.1016/j.calphad.2018.11.011) | `fc3b68475c2b54fbc268506a1e29b384351815b42b161004caaab01be6dc5c1c` | [viewer](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-19Big-3g.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeMn-19Big-3g.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeMn-19Big-3g.json) | | FeMn-23Jac.tdb | A. Jacob, E. Povoden-Karadeniz, P. Retzl, E. Kozeschnik, Calphad, 81, 102531(2023). [doi:10.1016/j.calphad.2023.102531](https://doi.org/10.1016/j.calphad.2023.102531) | `b1d4b760eabbecaed228481258d9ed0e492ec87a500710a4da07f623450ad371` | [viewer](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-23Jac.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeMn-23Jac.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeMn-23Jac.json) | | FeMn-87Hua.tdb | W. Huang, Calphad, 11, 183-86(1987). [doi:10.1016/0364-5916(87)90013-7](https://doi.org/10.1016/0364-5916%2887%2990013-7) | `3c63e147d2ae5b365173e4eccd8453ec996a1703a13442fe2ac6eb4b563f7d23` | [viewer](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-87Hua.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeMn-87Hua.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeMn-87Hua.json) | | FeMn-89Hua-LB.tdb | W. Huang, Calphad, 13, 243-52(1989). [doi:10.1016/0364-5916(89)90004-7](https://doi.org/10.1016/0364-5916%2889%2990004-7) | `e2d34b9be367a6592d55ec938ccbdd03ee8ff5fe60c738aef370802237c719fb` | [viewer](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-89Hua-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeMn-89Hua-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeMn-89Hua-LB.json) | | FeMn-89Hua-modified.tdb | W. Huang, Calphad, 13, 243-52(1989). [doi:10.1016/0364-5916(89)90004-7](https://doi.org/10.1016/0364-5916%2889%2990004-7) | `8767948ee291af1ef9b059b2c7afcc03d248c90512e1b6d2fb52f40903dd06e4` | [viewer](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-89Hua-modified.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeMn-89Hua-modified.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeMn-89Hua-modified.json) | | FeMn-89Lee.tdb | B.-J. Lee, D.N. Lee, Calphad, 13, 345-54(1989). [doi:10.1016/0364-5916(89)90024-2](https://doi.org/10.1016/0364-5916%2889%2990024-2) | `8d5883ffc9634f3577d0b3ded68da5f3f96c501faa7893d2fbba9bbe29c1d1bd` | [viewer](https://orchid-project.org/phase-diagrams/#FE-MN/FeMn-89Lee.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeMn-89Lee.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeMn-89Lee.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | FeMn-04Wit.tdb | 1748.34 | BCC_A2 (x(Mn) 0.10043) + FCC_A1 (x(Mn) 0.10242) + LIQUID (x(Mn) 0.13053) | | FeMn-04Wit.tdb | 1509.55 | FCC_A1 (x(Mn) 0.86827) + LIQUID (x(Mn) 0.87749) + BCC_A2 (x(Mn) 0.87831) | | FeMn-04Wit.tdb | 973.48 | FCC_A1 (x(Mn) 0.59179) + CUB_A13 (x(Mn) 0.66955) + CBCC_A12 (x(Mn) 0.67909) | | FeMn-04Wit.tdb | 524.1 | BCC_A2 (x(Mn) 0.02136) + FCC_A1 (x(Mn) 0.43384) + CBCC_A12 (x(Mn) 0.65111) | | FeMn-19Big-3g.tdb | 1746.24 | BCC_A2 (x(Mn) 0.10142) + FCC_A1 (x(Mn) 0.10325) + LIQUID (x(Mn) 0.13087) | | FeMn-19Big-3g.tdb | 1507.39 | FCC_A1 (x(Mn) 0.86578) + LIQUID (x(Mn) 0.87523) + BCC_A2 (x(Mn) 0.8763) | | FeMn-19Big-3g.tdb | 982.12 | FCC_A1 (x(Mn) 0.57756) + CUB_A13 (x(Mn) 0.68536) + CBCC_A12 (x(Mn) 0.69367) | | FeMn-19Big-3g.tdb | 490.15 | BCC_A2 (x(Mn) 0.03884) + FCC_A1 (x(Mn) 0.41059) + CBCC_A12 (x(Mn) 0.72904) | | FeMn-23Jac.tdb | 1659.51 | FCC_A1 (x(Mn) 0.44002) + BCC_A2 (x(Mn) 0.45628) + LIQUID (x(Mn) 0.49864) | | FeMn-23Jac.tdb | 1571.77 | FCC_A1 (x(Mn) 0.69284) + BCC_A2 (x(Mn) 0.70911) + LIQUID (x(Mn) 0.73751) | | FeMn-23Jac.tdb | 1317.45 | BCC_A2 (x(Mn) 1) + CUB_A13 (x(Mn) 1) + FCC_A1 (x(Mn) 1) | | FeMn-23Jac.tdb | 986.84 | FCC_A1 (x(Mn) 0.63627) + CUB_A13 (x(Mn) 0.69926) + CBCC_A12 (x(Mn) 0.70559) | | FeMn-23Jac.tdb | 507.68 | BCC_A2 (x(Mn) 0.0247) + FCC_A1 (x(Mn) 0.44288) + CBCC_A12 (x(Mn) 0.64358) | | FeMn-87Hua.tdb | 1746.89 | BCC_A2 (x(Mn) 0.09287) + FCC_A1 (x(Mn) 0.09394) + LIQUID (x(Mn) 0.1207) | | FeMn-87Hua.tdb | 1509.65 | FCC_A1 (x(Mn) 0.89545) + LIQUID (x(Mn) 0.90225) + BCC_A2 (x(Mn) 0.90476) | | FeMn-87Hua.tdb | 969.62 | FCC_A1 (x(Mn) 0.56748) + CUB_A13 (x(Mn) 0.69236) + CBCC_A12 (x(Mn) 0.69419) | | FeMn-87Hua.tdb | 568.67 | BCC_A2 (x(Mn) 0.01038) + FCC_A1 (x(Mn) 0.40295) + CBCC_A12 (x(Mn) 0.683) | | FeMn-89Hua-LB.tdb | 1746.75 | BCC_A2 (x(Mn) 0.10035) + FCC_A1 (x(Mn) 0.10141) + LIQUID (x(Mn) 0.1291) | | FeMn-89Hua-LB.tdb | 1507.22 | FCC_A1 (x(Mn) 0.86744) + LIQUID (x(Mn) 0.87529) + BCC_A2 (x(Mn) 0.8765) | | FeMn-89Hua-LB.tdb | 973.23 | FCC_A1 (x(Mn) 0.60613) + CUB_A13 (x(Mn) 0.68092) + CBCC_A12 (x(Mn) 0.68965) | | FeMn-89Hua-LB.tdb | 521.29 | BCC_A2 (x(Mn) 0.03324) + FCC_A1 (x(Mn) 0.43577) + CBCC_A12 (x(Mn) 0.65932) | | FeMn-89Hua-modified.tdb | 1746.75 | BCC_A2 (x(Mn) 0.10036) + FCC_4SL (x(Mn) 0.10142) + LIQUID (x(Mn) 0.1291) | | FeMn-89Hua-modified.tdb | 1746.75 | BCC_A2 (x(Mn) 0.10036) + FCC_A1 (x(Mn) 0.10142) + LIQUID (x(Mn) 0.1291) | | FeMn-89Hua-modified.tdb | 1667.47 | BCC_A2 (x(Mn) 0) + FCC_4SL (x(Mn) 0) + FCC_A1 (x(Mn) 0) | | FeMn-89Hua-modified.tdb | 1507.22 | FCC_4SL (x(Mn) 0.86739) + LIQUID (x(Mn) 0.87524) + BCC_A2 (x(Mn) 0.87645) | | FeMn-89Hua-modified.tdb | 1507.22 | FCC_A1 (x(Mn) 0.86739) + LIQUID (x(Mn) 0.87524) + BCC_A2 (x(Mn) 0.87645) | | FeMn-89Hua-modified.tdb | 1411.01 | BCC_A2 (x(Mn) 1) + FCC_4SL (x(Mn) 1) + FCC_A1 (x(Mn) 1) | | FeMn-89Hua-modified.tdb | 973.16 | FCC_4SL (x(Mn) 0.60592) + CUB_A13 (x(Mn) 0.68076) + CBCC_A12 (x(Mn) 0.68951) | | FeMn-89Hua-modified.tdb | 522.54 | BCC_A2 (x(Mn) 0.03346) + FCC_4SL (x(Mn) 0.43448) + CBCC_A12 (x(Mn) 0.6585) | | FeMn-89Lee.tdb | 1748.48 | BCC_A2 (x(Mn) 0.09057) + FCC_A1 (x(Mn) 0.09231) + LIQUID (x(Mn) 0.11934) | | FeMn-89Lee.tdb | 1508.23 | FCC_A1 (x(Mn) 0.86234) + LIQUID (x(Mn) 0.87076) + BCC_A2 (x(Mn) 0.87137) | | FeMn-89Lee.tdb | 967.25 | FCC_A1 (x(Mn) 0.58401) + CUB_A13 (x(Mn) 0.66381) + CBCC_A12 (x(Mn) 0.66961) | | FeMn-89Lee.tdb | 306.61 | BCC_A2 (x(Mn) 3.300e-4) + FCC_A1 (x(Mn) 0.57049) + CBCC_A12 (x(Mn) 0.77161) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/FE/FE-MN.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/FE/FE-MN.json) · [CALPHAD hull FeMn-04Wit](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-MN--FeMn-04Wit.json) · [CALPHAD hull FeMn-19Big-3g](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-MN--FeMn-19Big-3g.json) · [CALPHAD hull FeMn-87Hua](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-MN--FeMn-87Hua.json) · [CALPHAD hull FeMn-89Hua-LB](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-MN--FeMn-89Hua-LB.json) · [CALPHAD hull FeMn-89Hua-modified](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-MN--FeMn-89Hua-modified.json) · [CALPHAD hull FeMn-89Lee](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-MN--FeMn-89Lee.json) ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the Fe–Mn system (22) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 1748.5 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.1; fcc-A1: Mn 0.102; liquid: Mn 0.139 | model | [1] Witusiewicz 2004 | Table 2, p. 3, row 10; `ORC-I4I553S3VY` | | | 1747 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.1; fcc-A1: Mn 0.101; liquid: Mn 0.129 | model | [1] Witusiewicz 2004; _cites ref. 1989Hua_ | Table 2, p. 3, row 9; `ORC-3WUDKHRSYC` | | | 1747 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.096; fcc-A1: Mn 0.102; liquid: Mn 0.13 | experimental | [1] Witusiewicz 2004; _cites Hellawell 1956_ | Table 2, p. 3, row 7; `ORC-WMNQTQD7MA` | | | 1746.8 | peritectic: Liquid + bcc-A2 -> fcc-A1 | L: Mn 0.1; bcc-A2: Mn 0.129; fcc-A1: Mn 0.129 | model | [2] (ed.) 1998 | Table I, p. 215, row 3; `ORC-LOQDXUCXPB` | | | 1746 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.101; fcc-A1: Mn 0.102; liquid: Mn 0.13 | model | [1] Witusiewicz 2004; _cites Huang 1987_ | Table 2, p. 3, row 8; `ORC-GMUUKYUYZZ` | | | 1509.6 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.878; fcc-A1: Mn 0.868; liquid: Mn 0.877 | model | [1] Witusiewicz 2004 | Table 2, p. 3, row 14; `ORC-H6WWEB52US` | | | 1508 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.912; fcc-A1: Mn 0.903; liquid: Mn 0.909 | model | [1] Witusiewicz 2004; _cites Huang 1987_ | Table 2, p. 3, row 12; `ORC-35XGF52T5R` | | | 1507.2 | peritectic: Liquid + bcc-A2 -> fcc-A1 | L: Mn 0.867; bcc-A2: Mn 0.877; fcc-A1: Mn 0.875 | model | [2] (ed.) 1998 | Table I, p. 215, row 4; `ORC-VJGIMSZ6YR` | | | 1507 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.87; fcc-A1: Mn 0.864; liquid: Mn 0.867 | experimental | [1] Witusiewicz 2004; _cites Hellawell 1956_ | Table 2, p. 3, row 11; `ORC-N3X6PQOQWP` | | | 1507 | peritectic: liquid + bcc-A2 -> fcc-A1 | bcc-A2: Mn 0.877; fcc-A1: Mn 0.875; liquid: Mn 0.867 | model | [1] Witusiewicz 2004; _cites ref. 1989Hua_ | Table 2, p. 3, row 13; `ORC-YLAJPNZTHY` | | | 1433.2 | congruent transformation: fcc-A1 -> cub-A13 | fcc-A1: Mn 0.854; cub-A13: Mn 0.854 | model | [1] Witusiewicz 2004 | Table 2, p. 3, row 18; `ORC-PCARZMENHI` | | | 1429 | congruent transformation: fcc-A1 -> cub-A13 | fcc-A1: Mn 0.87; cub-A13: Mn 0.87 | experimental | [1] Witusiewicz 2004; _cites Hellawell 1956_ | Table 2, p. 3, row 15; `ORC-A7CLLFP7HL` | | | 1429 | congruent transformation: fcc-A1 -> cub-A13 | fcc-A1: Mn 0.864; cub-A13: Mn 0.864 | model | [1] Witusiewicz 2004; _cites ref. 1989Hua_ | Table 2, p. 3, row 17; `ORC-KR5AKNV7XJ` | | | 1429 | congruent transformation: fcc-A1 -> cub-A13 | fcc-A1: Mn 0.863; cub-A13: Mn 0.863 | model | [1] Witusiewicz 2004; _cites Huang 1987_ | Table 2, p. 3, row 16; `ORC-ROWZNUNJJM` | | | 973.5 | eutectoid: cub-A13 -> fcc-A1 + bcc-A12 | cub-A13: Mn 0.67; fcc-A1: Mn 0.592; bcc-A12: Mn 0.679 | model | [1] Witusiewicz 2004 | Table 2, p. 3, row 4; `ORC-VHVKO4TFBB` | | | 973.2 | eutectoid: cub-A13 -> fcc-A1 + cbcc-A12 | cub-A13: Mn 0.681; fcc-A1: Mn 0.606; cbcc-A12: Mn 0.69 | model | [2] (ed.) 1998 | Table I, p. 215, row 1; `ORC-YKHFTWT2X3` | | | 973 | eutectoid: cub-A13 -> fcc-A1 + bcc-A12 | cub-A13: Mn 0.701; fcc-A1: Mn 0.59; bcc-A12: Mn 0.703 | model | [1] Witusiewicz 2004; _cites Huang 1987_ | Table 2, p. 3, row 2; `ORC-2Y4SR2VRCF` | | | 973 | eutectoid: cub-A13 -> fcc-A1 + bcc-A12 | cub-A13: Mn 0.681; fcc-A1: Mn 0.606; bcc-A12: Mn 0.69 | model | [1] Witusiewicz 2004; _cites ref. 1989Hua_ | Table 2, p. 3, row 3; `ORC-3TPGMMJHF7` | | | 973 | eutectoid: cub-A13 -> fcc-A1 + bcc-A12 | cub-A13: Mn 0.66; fcc-A1: Mn 0.62; bcc-A12: Mn 0.68 | experimental | [1] Witusiewicz 2004; _cites Hellawell 1956_ | Table 2, p. 3, row 1; `ORC-TRH7YM2E6K` | | | 528 | eutectoid: fcc-A1 -> bcc-A2 + bcc-A12 | fcc-A1: Mn 0.431; bcc-A2: Mn 0.022; bcc-A12: Mn 0.647 | model | [1] Witusiewicz 2004 | Table 2, p. 3, row 6; `ORC-NMRROQ7RD4` | | | 521.3 | eutectoid: fcc-A1 -> bcc-A2 + cbcc-A12 | fcc-A1: Mn 0.436; bcc-A2: Mn 0.033; cbcc-A12: Mn 0.659 | model | [2] (ed.) 1998 | Table I, p. 215, row 2; `ORC-GDQBXOSCEK` | | | 521 | eutectoid: fcc-A1 -> bcc-A2 + bcc-A12 | fcc-A1: Mn 0.436; bcc-A2: Mn 0.033; bcc-A12: Mn 0.659 | model | [1] Witusiewicz 2004; _cites ref. 1989Hua_ | Table 2, p. 3, row 5; `ORC-QWBXS75U3L` | | ## 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, Fe–Mn system (6) | Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote | |---|---|---:|---:|---|---:|---:|---|---|---| | C14 Laves FeMn2 | | 18.636 kJ/mol-atom | 0 | DFT | | | [3] Zheng 2022 | Table 4, p. 6, row 11; `ORC-EXKNNWDIND.99b2b8` | | | C14 Laves FeMn2 | [FeMn2](https://data.orchid-project.org/compounds/FeMn2.html) | 18.653 kJ/mol-atom | 298.15 | model | | 14.765 (oqmd-1449617) | [3] Zheng 2022 | Table 4, p. 6, row 12; `ORC-DN4BLS2SBJ.de1cc2` | | | C14 Laves MnFe2 | | 21.311 kJ/mol-atom | 0 | DFT | | | [3] Zheng 2022 | Table 4, p. 6, row 13; `ORC-D4DOUX2AZK.e862ae` | | | C14 Laves MnFe2 | [Fe2Mn](https://data.orchid-project.org/compounds/Fe2Mn.html) | 25.409 kJ/mol-atom | 298.15 | model | | 16.64 (oqmd-1449732) | [3] Zheng 2022 | Table 4, p. 6, row 14; `ORC-K2V4FKD4V3.934b2d` | | | fee | | -2 kJ/mol (basis unstated) | 1443 | experimental | | | [4] Huang 1991; _cites ref. 1_ | p. 4; `ORC-R3OI6XYIOO.2b2d08` | “For a SO-50 alloy and with the same structure of pure elements as reference give the following enthalpy of formation of the Fe-Mn states, the experiments alloy (1): -1 kJ/mol for liquid at 1873 K, -2 kJ/mol for fee at 1443 K; of the Fe-V alloy (2): -8.6 kJ/mol for liquid at 1873 K, -5.3 kJ/mol for bee at 1623 K.” | | liquid | | -1 kJ/mol (basis unstated) | 1873 | experimental | | | [4] Huang 1991; _cites ref. 1_ | p. 4; `ORC-R3OI6XYIOO.0b1488` | “For a SO-50 alloy and with the same structure of pure elements as reference give the following enthalpy of formation of the Fe-Mn states, the experiments alloy (1): -1 kJ/mol for liquid at 1873 K, -2 kJ/mol for fee at 1443 K; of the Fe-V alloy (2): -8.6 kJ/mol for liquid at 1873 K, -5.3 kJ/mol for bee at 1623 K.” | ## Other properties ### Mixing / partial (3) Table: Mixing / partial, Fe–Mn system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Enthalpy of mixing; _printed: ΔmixH^SQS_ | -3.952 kJ/mol-atom | | fcc; _alloy: Fe 0.5, Mn 0.5_ | DFT | [5] Bracq 2021 | Table 1, p. 4, row 8; `ORC-4WQALBOGIS.65ae6d` | | | Enthalpy of mixing; _printed: heat of mixing_ | -4900 J/m01 | 1400 | | experimental | [6] Huang 1989; _cites ref. 24_ | p. 2; `ORC-IPGZTZRFJK` | “In the 7 phase, a negative heat of mixing at 1400 K with a minimum of -4900 J/m01 was reported by Kendall et al. (24).” | | Enthalpy of mixing; _printed: heat of mixing_ | -3 kJ/mol-atom | 1443 | | experimental | [6] Huang 1989; _cites ref. 4_ | p. 2; `ORC-WQGTHGAW2Z` | “Recently, Kubitx et al. (4) determined the heat of mixing at 1443. 1073 and 873 K with a minimum of -3000 J/m01 at 1443 K.” | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. V.T. Witusiewicz, F. Sommer, E.J. Mittemeijer, Reevaluation of the Fe-Mn Phase Diagram, Journal of Phase Equilibria & Diffusion 25, 346-354 (2004). [doi:10.1361/15477030420115](https://doi.org/10.1361/15477030420115) 2. I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8. 3. Weisen Zheng, Wei Song, Tong Wu, Jingya Wang, Yanlin He, Xiao-Gang Lu, Experimental investigation and thermodynamic modeling of the ternary Ti–Fe–Mn system for hydrogen storage applications, Journal of Alloys and Compounds 891, 161957 (2022). [doi:10.1016/j.jallcom.2021.161957](https://doi.org/10.1016/j.jallcom.2021.161957) 4. Weiming Huang, A Thermodynamic Analysis of the Mn-V And Fe-Mn-V Systems, Calphad 15, 195-208 (1991). [doi:10.1016/0364-5916(91)90018-f](https://doi.org/10.1016/0364-5916%2891%2990018-f) 5. 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) 6. Weiming Huang, An assessment of the Fe-Mn system, Calphad 13, 243-252 (1989). [doi:10.1016/0364-5916(89)90004-7](https://doi.org/10.1016/0364-5916%2889%2990004-7) ## 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=\, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).