Mo–P phases

8 phases (tier A 4, tier B 1, liquid 1, needs_review 2); 5 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 · Mo–P system page · Markdown · field reference

Phases of the Mo–P system (8)
Phase	Structure	Basis	Stability (calculated)	TDB models
BCC_A2 phase:mo-p:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2904.15 K, x(P) 0–0.149	1
FCC_A1 phase:mo-p:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
HCP_A3 phase:mo-p:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
LIQUID phase:mo-p:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 821.01–4000 K, x(P) 0–1	1
MO3P phase:mo-p:mo3p	V3S · tI32 · I-42m (121)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–1974.15 K, x(P) 0.25–0.25	1
MOP_BH phase:mo-p:mop-bh	WC · B_h · hP2 · P-6m2 (187)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2154.05 K, x(P) 0.5–0.5	1
RED_P phase:mo-p:p-red		needs_review	stable in 1 of 1 calculated diagram(s): 300–916.01 K, x(P) 1–1	1
WHITE_P phase:mo-p:p-white		needs_review	not stable in 1 calculated diagram(s)	1

BCC_A2 (Mo–P)

Id: phase:mo-p: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): 300–2904.15 K, x(P) 0–0.149
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mo-p:bcc-a2
tdb: tdb:MoP-15Mie.tdb:BCC_A2

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

MoP-15Mie.tdb: BCC_A2, type code %B, sha256 680d0f91cc7104fb…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : MO% P : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
assessment that models this phase

FCC_A1 (Mo–P)

Id: phase:mo-p:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
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:mo-p:fcc-a1
tdb: tdb:MoP-15Mie.tdb:FCC_A1

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

MoP-15Mie.tdb: FCC_A1, type code %A, sha256 680d0f91cc7104fb…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : MO P : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
assessment that models this phase

HCP_A3 (Mo–P)

Id: phase:mo-p:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stoichiometry: Mo 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:mo-p:hcp-a3
tdb: tdb:MoP-15Mie.tdb:HCP_A3

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

MoP-15Mie.tdb: HCP_A3, type code %A, sha256 680d0f91cc7104fb…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : MO : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
assessment that models this phase

LIQUID (Mo–P)

Id: phase:mo-p:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 821.01–4000 K, x(P) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mo-p:liquid
tdb: tdb:MoP-15Mie.tdb:LIQUID

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

MoP-15Mie.tdb: LIQUID, type code %, sha256 680d0f91cc7104fb…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : MO P : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
assessment that models this phase

MO3P (Mo–P)

Id: phase:mo-p:mo3p; status assigned
Structure: V3S · tI32 · I-42m (121); type st:v3s-ti32; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Mo 0.7500, P 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–1974.15 K, x(P) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mo-p:mo3p
mp: mp:mp-aaaaaouu
oqmd: oqmd:oqmd-8015
tdb: tdb:MoP-15Mie.tdb:MO3P

TDB models of MO3P (1): PHASE and CONSTITUENT statements as written

MoP-15Mie.tdb: MO3P, type code %, sha256 680d0f91cc7104fb…

53: PHASE MO3P % 2 3 1 !
54: CONST MO3P : MO : P : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
assessment that models this phase

MOP_BH (Mo–P)

Id: phase:mo-p:mop-bh; status assigned
Structure: WC · B_h · hP2 · P-6m2 (187); type st:b-h-wc-hp2; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaaail and oqmd-13741, space group 187
Stoichiometry: Mo 0.5000, P 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–2154.05 K, x(P) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mo-p:mop-bh
mp: mp:mp-aaaaaail
oqmd: oqmd:oqmd-13741
tdb: tdb:MoP-15Mie.tdb:MOP_BH

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

MoP-15Mie.tdb: MOP_BH, type code %, sha256 680d0f91cc7104fb…

58: PHASE MOP_BH % 2 1 1 !
59: CONST MOP_BH : MO : P : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
assessment that models this phase

RED_P (Mo–P)

Id: phase:mo-p:p-red; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:RED; no_structure_token
Candidate (sgte_mmc2): (Red P) — Hallstedt 2025 mmc2 row for RED_P: Red P
Stoichiometry: P 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–916.01 K, x(P) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mo-p:p-red
tdb: tdb:MoP-15Mie.tdb:RED_P

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

MoP-15Mie.tdb: RED_P, type code %, sha256 680d0f91cc7104fb…

48: PHASE RED_P % 1 1 !
49: CONST RED_P : P : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
assessment that models this phase

WHITE_P (Mo–P)

Id: phase:mo-p:p-white; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:WHITE; no_structure_token
Candidate (sgte_mmc2): (White P) — Hallstedt 2025 mmc2 row for WHITE_P: White P
Stoichiometry: P 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:mo-p:p-white
tdb: tdb:MoP-15Mie.tdb:WHITE_P

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

MoP-15Mie.tdb: WHITE_P, type code %, sha256 680d0f91cc7104fb…

43: PHASE WHITE_P % 1 1 !
44: CONST WHITE_P : P : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-014-0357-z J. Miettinen, A. Pashkova, G. Vassilev, Thermodynamic Description of Ternary FE-X-P Systems. Part 4: FE-MO-P, J. Phase Equilib. Diffus. 36, 60-67 (2015).
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}
}