Be–Mo phases

8 phases (tier A 6, tier C 1, liquid 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 · Be–Mo system page · Markdown · field reference

Phases of the Be–Mo system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:be-mo:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–3999.73 K, x(Mo) 0–1	0	1
BE12MO_D2B phase:be-mo:be12mo-d2b	Mn12Th · D2_b · tI26 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1976.92 K, x(Mo) 0.07692–0.07692	2	1
BE22MO phase:be-mo:be22mo	Zn22Zr · cF184 · Fd-3m (227)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1554.84 K, x(Mo) 0.04348–0.04348	2	1
BE2MO_C14 phase:be-mo:be2mo-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2342.91 K, x(Mo) 0.33333–0.33333	2	1
BEMO3_A15 phase:be-mo:bemo3-a15	Cr3Si · A15 · cP8 · Pm-3n (223)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1175.9 K, x(Mo) 0.75–0.75	2	1
FCC_A1 phase:be-mo:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
HCP_A3 phase:be-mo:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1527.01 K, x(Mo) 0–0	0	1
LIQUID phase:be-mo:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1558.26–4000 K, x(Mo) 0–1	0	1

BCC_A2 (Be–Mo)

Id: phase:be-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): 300–3999.73 K, x(Mo) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:be-mo:bcc-a2
tdb: tdb:BeMo-07Nak.tdb:BCC_A2

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

BeMo-07Nak.tdb: BCC_A2, type code %B, sha256 75fb8f02c9ac7f20…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : BE MO : VA : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
assessment that models this phase

BE12MO_D2B (Be–Mo)

Id: phase:be-mo:be12mo-d2b; status assigned
Structure: Mn12Th · D2_b · tI26 · I4/mmm (139); type st:d2-b-mn12th-ti26; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaacet and oqmd-10889, space group 139
Stoichiometry: Be 0.9231, Mo 0.0769
Stability: stable in 1 of 1 calculated diagram(s): 300–1976.92 K, x(Mo) 0.07692–0.07692
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:be-mo:be12mo-d2b
mp: mp:mp-aaaaacet
oqmd: oqmd:oqmd-10889
paper: paper:10.2320/jinstmet.71.187:Be12Mo
tdb: tdb:BeMo-07Nak.tdb:BE12MO_D2B

TDB models of BE12MO_D2B (1): PHASE and CONSTITUENT statements as written

BeMo-07Nak.tdb: BE12MO_D2B, type code %, sha256 75fb8f02c9ac7f20…

46: PHASE BE12MO_D2B % 2 12 1 !
47: CONST BE12MO_D2B : BE : MO : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
assessment that models this phase; reports values for this phase

BE22MO (Be–Mo)

Id: phase:be-mo:be22mo; status assigned
Structure: Zn22Zr · cF184 · Fd-3m (227); type st:zn22zr-cf184; 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 (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Be 0.9565, Mo 0.0435
Stability: stable in 1 of 1 calculated diagram(s): 300–1554.84 K, x(Mo) 0.04348–0.04348
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:be-mo:be22mo
paper: paper:10.2320/jinstmet.71.187:Be22Mo
tdb: tdb:BeMo-07Nak.tdb:BE22MO

TDB models of BE22MO (1): PHASE and CONSTITUENT statements as written

BeMo-07Nak.tdb: BE22MO, type code %, sha256 75fb8f02c9ac7f20…

41: PHASE BE22MO % 2 22 1 !
42: CONST BE22MO : BE : MO : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
assessment that models this phase; reports values for this phase

BE2MO_C14 (Be–Mo)

Id: phase:be-mo:be2mo-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaacmn and oqmd-10888, space group 194
Stoichiometry: Be 0.6667, Mo 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–2342.91 K, x(Mo) 0.33333–0.33333
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:be-mo:be2mo-c14
mp: mp:mp-aaaaacmn
oqmd: oqmd:oqmd-10888
paper: paper:10.2320/jinstmet.71.187:Be2Mo
tdb: tdb:BeMo-07Nak.tdb:BE2MO_C14

TDB models of BE2MO_C14 (1): PHASE and CONSTITUENT statements as written

BeMo-07Nak.tdb: BE2MO_C14, type code %, sha256 75fb8f02c9ac7f20…

51: PHASE BE2MO_C14 % 2 2 1 !
52: CONST BE2MO_C14 : BE : MO : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
assessment that models this phase; reports values for this phase

BEMO3_A15 (Be–Mo)

Id: phase:be-mo:bemo3-a15; status assigned
Structure: Cr3Si · A15 · cP8 · Pm-3n (223); type st:a15-cr3si-cp8; tier A: standard phase name; confidence high
Stoichiometry: Be 0.2500, Mo 0.7500
Stability: stable in 1 of 1 calculated diagram(s): 300–1175.9 K, x(Mo) 0.75–0.75
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:be-mo:bemo3-a15
paper: paper:10.2320/jinstmet.71.187:BeMo3
tdb: tdb:BeMo-07Nak.tdb:BEMO3_A15

TDB models of BEMO3_A15 (1): PHASE and CONSTITUENT statements as written

BeMo-07Nak.tdb: BEMO3_A15, type code %, sha256 75fb8f02c9ac7f20…

56: PHASE BEMO3_A15 % 2 1 3 !
57: CONST BEMO3_A15 : BE : MO : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
assessment that models this phase; reports values for this phase

FCC_A1 (Be–Mo)

Id: phase:be-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: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:be-mo:fcc-a1
tdb: tdb:BeMo-07Nak.tdb:FCC_A1

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

BeMo-07Nak.tdb: FCC_A1, type code %A, sha256 75fb8f02c9ac7f20…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : BE MO : VA : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
assessment that models this phase

HCP_A3 (Be–Mo)

Id: phase:be-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): 300–1527.01 K, x(Mo) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:be-mo:hcp-a3
tdb: tdb:BeMo-07Nak.tdb:HCP_A3

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

BeMo-07Nak.tdb: HCP_A3, type code %A, sha256 75fb8f02c9ac7f20…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : BE% MO : VA : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
assessment that models this phase

LIQUID (Be–Mo)

Id: phase:be-mo:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1558.26–4000 K, x(Mo) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:be-mo:liquid
tdb: tdb:BeMo-07Nak.tdb:LIQUID

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

BeMo-07Nak.tdb: LIQUID, type code %, sha256 75fb8f02c9ac7f20…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : BE MO : !

Example references (1 of 1; assessments first):

doi:10.2320/jinstmet.71.187 Kazuyoshi Nakashima, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Be-Mo Binary Phase Diagram, J. Japan Inst. Metals 71, 187-189 (2007).
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}
}