C–Mo phases

8 phases (tier A 4, tier C 1, liquid 1, needs_review 1, interstitial_fcc_a1_compound 1); 7 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 · full JSON · Markdown · field reference

Phases of the C–Mo system (8)
Phase	Structure	Basis	Stability (calculated)	TDB models
DIAMOND_A4 phase:c-mo:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
GRAPHITE_A9 phase:c-mo:a9-graphite	C (graphite) · A9 · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–4000 K, x(C) 1–1	1
BCC_A2 phase:c-mo:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2895.99 K, x(C) 0–0.00877	1
MC_ETA phase:c-mo:eta-mc		needs_review	stable in 1 of 1 calculated diagram(s): 1930–2826.05 K, x(C) 0.35528–0.40968	1
FCC_A1 phase:c-mo:fcc-a1	NaCl · B1 · cF8 · Fm-3m (225)	assigned	stable in 1 of 1 calculated diagram(s): 2236.75–2866.05 K, x(C) 0.3974–0.43199	1
HCP_A3 phase:c-mo:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2788.61 K, x(C) 0.27109–0.33333	1
LIQUID phase:c-mo:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 2477.77–4000 K, x(C) 0–0.58357	1
MC_SHP phase:c-mo:mc-shp	WC · B_h · hP2 · P-6m2 (187)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1422.95 K, x(C) 0.5–0.5	1

DIAMOND_A4 (C–Mo)

Id: phase:c-mo:a4-diamond; status assigned
Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type st:a4-c-diamond-cf8; tier A: standard phase name; confidence high
Stoichiometry: C 1.0000
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:a4-diamond
tdb: tdb:MoC-88And-LB.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (1): PHASE and CONSTITUENT statements as written

MoC-88And-LB.tdb: DIAMOND_A4, type code %, sha256 8c882437177ec794…

49: PHASE DIAMOND_A4 % 1 1 !
50: CONST DIAMOND_A4 : C : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

GRAPHITE_A9 (C–Mo)

Id: phase:c-mo:a9-graphite; status assigned
Structure: C (graphite) · A9 · hP4 · P6_3/mmc (194); type st:a9-c-graphite-hp4; tier A: standard phase name; confidence high
Stoichiometry: C 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–4000 K, x(C) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:a9-graphite
tdb: tdb:MoC-88And-LB.tdb:GRAPHITE_A9

TDB models of GRAPHITE_A9 (1): PHASE and CONSTITUENT statements as written

MoC-88And-LB.tdb: GRAPHITE_A9, type code %, sha256 8c882437177ec794…

54: PHASE GRAPHITE_A9 % 1 1 !
55: CONST GRAPHITE_A9 : C : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

BCC_A2 (C–Mo)

Id: phase:c-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 1 of 1 calculated diagram(s): 300–2895.99 K, x(C) 0–0.00877
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:bcc-a2
tdb: tdb:MoC-88And-LB.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

MoC-88And-LB.tdb: BCC_A2, type code %B, sha256 8c882437177ec794…

39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : MO : C VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

MC_ETA (C–Mo)

Id: phase:c-mo:eta-mc; status needs_review
No structure assigned. Why: assessment_declared_compound_differs_from_site_ratios; name_has_descriptive_tokens:MC; no_structure_token
Candidate (sgte_mmc2): TiAs · B_i · hP8 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for MC_ETA: Mo3C2
Candidate (tdb_comment): TiAs · hP8 · P6_3/mmc, SB: B_i — MoC-88And-LB.tdb: 'Prototype TiAs (hP8, P6_3/mmc, SB: B_i)'
Stability: stable in 1 of 1 calculated diagram(s): 1930–2826.05 K, x(C) 0.35528–0.40968
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:eta-mc
tdb: tdb:MoC-88And-LB.tdb:MC_ETA

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

MoC-88And-LB.tdb: MC_ETA, type code %, sha256 8c882437177ec794…

59: PHASE MC_ETA % 2 1 1 !
60: CONST MC_ETA : MO : C% VA : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

FCC_A1 (C–Mo)

Id: phase:c-mo:fcc-a1; status assigned
Structure: NaCl · B1 · cF8 · Fm-3m (225); type st:b1-nacl-cf8; interstitial_fcc_a1_compound; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 2236.75–2866.05 K, x(C) 0.3974–0.43199
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:fcc-a1
tdb: tdb:MoC-88And-LB.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

MoC-88And-LB.tdb: FCC_A1, type code %A, sha256 8c882437177ec794…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : MO : C VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

HCP_A3 (C–Mo)

Id: phase:c-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: stable in 1 of 1 calculated diagram(s): 300–2788.61 K, x(C) 0.27109–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:hcp-a3
tdb: tdb:MoC-88And-LB.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

MoC-88And-LB.tdb: HCP_A3, type code %A, sha256 8c882437177ec794…

44: PHASE HCP_A3 %A 2 1 0.5 !
45: CONST HCP_A3 : MO : C VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

LIQUID (C–Mo)

Id: phase:c-mo:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 2477.77–4000 K, x(C) 0–0.58357
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:liquid
tdb: tdb:MoC-88And-LB.tdb:LIQUID

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

MoC-88And-LB.tdb: LIQUID, type code %, sha256 8c882437177ec794…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : C MO : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

MC_SHP (C–Mo)

Id: phase:c-mo:mc-shp; status assigned
Structure: WC · B_h · hP2 · P-6m2 (187); type st:b-h-wc-hp2; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (name_has_descriptive_tokens:MC,SHP, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: C 0.5000, Mo 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1422.95 K, x(C) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-mo:mc-shp
tdb: tdb:MoC-88And-LB.tdb:MC_SHP

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

MoC-88And-LB.tdb: MC_SHP, type code %, sha256 8c882437177ec794…

64: PHASE MC_SHP % 2 1 1 !
65: CONST MC_SHP : MO : C : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(88)90024-7 J.-O. Andersson, Calphad, 12, 1-8(1988).
assessment that models this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi: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). doi: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.

@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}
}