# Mn–Mo phases

> Mn–Mo system: 9 phases (tier A 8, liquid 1); 8 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

HTML: https://data.orchid-project.org/phases/pages/MN-MO.html · Markdown: https://data.orchid-project.org/phases/pages/MN-MO.md

9 phases (tier A 8, liquid 1); 8 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: [interactive registry](https://orchid-project.org/phases/?q=MN-MO) · [full JSON](https://data.orchid-project.org/phases/systems/MN-MO.json) · [Mn–Mo system page](https://data.orchid-project.org/systems/MN-MO.html) · [Markdown](https://data.orchid-project.org/phases/pages/MN-MO.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Mn–Mo system (9)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-mn-mo-bcc-a2); _phase:mn-mo:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2896.02 K, x(Mo) 0–1 | 0 | 2 |
| [CBCC_A12](#phase-mn-mo-cbcc-a12); _phase:mn-mo:cbcc-a12_ | alpha-Mn · A12 · cI58 · I-43m (217) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1387.72 K, x(Mo) 0–0.14627 | 0 | 2 |
| [CUB_A13](#phase-mn-mo-cub-a13); _phase:mn-mo:cub-a13_ | beta-Mn · A13 · cP20 · P4_132 (213) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 979.01–1386.58 K, x(Mo) 0–0.08286 | 0 | 2 |
| [MU_D85](#phase-mn-mo-d85-mu); _phase:mn-mo:d85-mu_ | Fe7W6 · D8_5 · hR13 · R-3m (166) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 445.01–1791.16 K, x(Mo) 0.46154–0.49726 | 0 | 2 |
| [SIGMA_D8B](#phase-mn-mo-d8b-sigma); _phase:mn-mo:d8b-sigma_ | sigma-CrFe · D8_b · tP30 · P4_2/mnm (136) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1340.17–1681.11 K, x(Mo) 0.32758–0.40549 | 0 | 2 |
| [FCC_A1](#phase-mn-mo-fcc-a1); _phase:mn-mo:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1360–1482.25 K, x(Mo) 0–0.00643 | 0 | 2 |
| [HCP_A3](#phase-mn-mo-hcp-a3); _phase:mn-mo:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| [LIQUID](#phase-mn-mo-liquid); _phase:mn-mo:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 1519–4000 K, x(Mo) 0–1 | 0 | 2 |
| [SIGMA_OLD](#phase-mn-mo-old-sigma); _phase:mn-mo:old-sigma_ | sigma-CrFe · D8_b · tP30 · P4_2/mnm (136) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1352.01–1669.41 K, x(Mo) 0.32122–0.39397 | 0 | 1 |

## BCC_A2 (Mn–Mo)

- Id: `phase:mn-mo:bcc-a2`; status `assigned`
- Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 300–2896.02 K, x(Mo) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:bcc-a2)

Names (3): _corpus: _corpus:phase:mn-mo:bcc-a2  
_tdb: _tdb:MnMo-95Lee-LB.tdb:BCC_A2, tdb:MnMo-95Lee-mod.tdb:BCC_A2  


### TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): BCC_A2, type code %B, sha256 `8ec3994945cdecb5…`

~~~~text
37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : MN MO : VA : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): BCC_A2, type code %B, sha256 `aa6879913e5c586e…`

~~~~text
43: PHASE BCC_A2 %B 2 1 3 !
44: CONST BCC_A2 : MN MO : VA : !
~~~~

## CBCC_A12 (Mn–Mo)

- Id: `phase:mn-mo:cbcc-a12`; status `assigned`
- Structure: alpha-Mn · A12 · cI58 · I-43m (217); type `st:a12-alpha-mn-ci58`; tier A: standard phase name; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 300–1387.72 K, x(Mo) 0–0.14627
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:cbcc-a12)

Names (3): _corpus: _corpus:phase:mn-mo:cbcc-a12  
_tdb: _tdb:MnMo-95Lee-LB.tdb:CBCC_A12, tdb:MnMo-95Lee-mod.tdb:CBCC_A12  


### TDB models of CBCC_A12 (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): CBCC_A12, type code %, sha256 `8ec3994945cdecb5…`

~~~~text
47: PHASE CBCC_A12 % 2 1 1 !
48: CONST CBCC_A12 : MN MO : VA : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): CBCC_A12, type code %, sha256 `aa6879913e5c586e…`

~~~~text
53: PHASE CBCC_A12 % 2 1 1 !
54: CONST CBCC_A12 : MN MO : VA : !
~~~~

## CUB_A13 (Mn–Mo)

- Id: `phase:mn-mo:cub-a13`; status `assigned`
- Structure: beta-Mn · A13 · cP20 · P4_132 (213); type `st:a13-beta-mn-cp20`; tier A: standard phase name; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 979.01–1386.58 K, x(Mo) 0–0.08286
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:cub-a13)

Names (3): _corpus: _corpus:phase:mn-mo:cub-a13  
_tdb: _tdb:MnMo-95Lee-LB.tdb:CUB_A13, tdb:MnMo-95Lee-mod.tdb:CUB_A13  


### TDB models of CUB_A13 (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): CUB_A13, type code %, sha256 `8ec3994945cdecb5…`

~~~~text
52: PHASE CUB_A13 % 2 1 1 !
53: CONST CUB_A13 : MN MO : VA : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): CUB_A13, type code %, sha256 `aa6879913e5c586e…`

~~~~text
58: PHASE CUB_A13 % 2 1 1 !
59: CONST CUB_A13 : MN MO : VA : !
~~~~

## MU_D85 (Mn–Mo)

- Id: `phase:mn-mo:d85-mu`; status `assigned`
- Structure: Fe7W6 · D8_5 · hR13 · R-3m (166); type `st:d8-5-fe7w6-hr13`; tier A: standard phase name; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 445.01–1791.16 K, x(Mo) 0.46154–0.49726
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:d85-mu)

Names (3): _corpus: _corpus:phase:mn-mo:d85-mu  
_tdb: _tdb:MnMo-95Lee-LB.tdb:MU_D85, tdb:MnMo-95Lee-mod.tdb:MU_D85  


### TDB models of MU_D85 (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): MU_D85, type code %, sha256 `8ec3994945cdecb5…`

~~~~text
57: PHASE MU_D85 % 3 7 2 4 !
58: CONST MU_D85 : MN : MO : MO : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): MU_D85, type code %, sha256 `aa6879913e5c586e…`

~~~~text
63: PHASE MU_D85 % 4 1 4 2 6 !
64: CONST MU_D85 : MN : MO : MO : MN% MO : !
~~~~

## SIGMA_D8B (Mn–Mo)

- Id: `phase:mn-mo:d8b-sigma`; status `assigned`
- Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type `st:d8-b-sigma-crfe-tp30`; tier A: standard phase name; confidence high
- Caveat: partitioned order/disorder model in MnMo-95Lee-mod.tdb also describes the disordered state
- Stability: stable in 2 of 2 calculated diagram(s): 1340.17–1681.11 K, x(Mo) 0.32758–0.40549
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:d8b-sigma)

Names (3): _corpus: _corpus:phase:mn-mo:d8b-sigma  
_tdb: _tdb:MnMo-95Lee-LB.tdb:SIGMA_D8B, tdb:MnMo-95Lee-mod.tdb:SIGMA_D8B  


### TDB models of SIGMA_D8B (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): SIGMA_D8B, type code %, sha256 `8ec3994945cdecb5…`

~~~~text
62: PHASE SIGMA_D8B % 3 10 4 16 !
63: CONST SIGMA_D8B : MN : MO : MN MO : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): SIGMA_D8B, type code %, sha256 `aa6879913e5c586e…`

~~~~text
68: PHASE SIGMA_D8B % 3 10 4 16 !
69: CONST SIGMA_D8B : MN% MO : MO : MN MO : !
~~~~

## FCC_A1 (Mn–Mo)

- Id: `phase:mn-mo:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 1360–1482.25 K, x(Mo) 0–0.00643
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:fcc-a1)

Names (3): _corpus: _corpus:phase:mn-mo:fcc-a1  
_tdb: _tdb:MnMo-95Lee-LB.tdb:FCC_A1, tdb:MnMo-95Lee-mod.tdb:FCC_A1  


### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): FCC_A1, type code %A, sha256 `8ec3994945cdecb5…`

~~~~text
32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : MN MO : VA : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): FCC_A1, type code %A, sha256 `aa6879913e5c586e…`

~~~~text
38: PHASE FCC_A1 %A 2 1 1 !
39: CONST FCC_A1 : MN MO : VA : !
~~~~

## HCP_A3 (Mn–Mo)

- Id: `phase:mn-mo:hcp-a3`; status `assigned`
- Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high
- Stability: not stable in 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:hcp-a3)

Names (3): _corpus: _corpus:phase:mn-mo:hcp-a3  
_tdb: _tdb:MnMo-95Lee-LB.tdb:HCP_A3, tdb:MnMo-95Lee-mod.tdb:HCP_A3  


### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): HCP_A3, type code %A, sha256 `8ec3994945cdecb5…`

~~~~text
42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : MN MO : VA : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): HCP_A3, type code %A, sha256 `aa6879913e5c586e…`

~~~~text
48: PHASE HCP_A3 %A 2 1 0.5 !
49: CONST HCP_A3 : MN MO : VA : !
~~~~

## LIQUID (Mn–Mo)

- Id: `phase:mn-mo:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 1519–4000 K, x(Mo) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:liquid)

Names (3): _corpus: _corpus:phase:mn-mo:liquid  
_tdb: _tdb:MnMo-95Lee-LB.tdb:LIQUID, tdb:MnMo-95Lee-mod.tdb:LIQUID  


### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): LIQUID, type code %, sha256 `8ec3994945cdecb5…`

~~~~text
27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : MN MO : !
~~~~

[MnMo-95Lee-mod.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-mod.tdb): LIQUID, type code %, sha256 `aa6879913e5c586e…`

~~~~text
33: PHASE LIQUID:L % 1 1 !
34: CONST LIQUID:L : MN MO : !
~~~~

## SIGMA_OLD (Mn–Mo)

- Id: `phase:mn-mo:old-sigma`; status `assigned`
- Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type `st:d8-b-sigma-crfe-tp30`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 1352.01–1669.41 K, x(Mo) 0.32122–0.39397
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mn-mo:old-sigma)

Names (2): _corpus: _corpus:phase:mn-mo:old-sigma  
_tdb: _tdb:MnMo-95Lee-LB.tdb:SIGMA_OLD  


### TDB models of SIGMA_OLD (1): PHASE and CONSTITUENT statements as written

[MnMo-95Lee-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MnMo-95Lee-LB.tdb): SIGMA_OLD, type code %, sha256 `8ec3994945cdecb5…`

~~~~text
67: PHASE SIGMA_OLD % 3 8 4 18 !
68: CONST SIGMA_OLD : MN : MO : MN MO : !
~~~~

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970
- 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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work).

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_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@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 the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).