Ho–Mn phases

9 phases (tier A 6, liquid 1, needs_review 2); 9 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 · Ho–Mn system page · Markdown · field reference

Phases of the Ho–Mn system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ho-mn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1390–2423.99 K, x(Mn) 0.98894–1	2	2
CBCC_A12 phase:ho-mn:cbcc-a12	alpha-Mn · A12 · cI58 · I-43m (217)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1355 K, x(Mn) 0.99986–1	2	2
CUB_A13 phase:ho-mn:cub-a13	beta-Mn · A13 · cP20 · P4_132 (213)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 979.33–1404.99 K, x(Mn) 0.99298–1	3	2
FCC_A1 phase:ho-mn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1344.63–1426 K, x(Mn) 0.98945–1	5	2
HCP_A3 phase:ho-mn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1787.8 K, x(Mn) 0–0.00171	2	2
HO6MN23_D8A phase:ho-mn:ho6mn23-d8a		needs_review	stable in 2 of 2 calculated diagram(s): 300–1396.77 K, x(Mn) 0.793–0.7931	4	2
HOMN12_D2B phase:ho-mn:homn12-d2b	Mn12Th · D2_b · tI26 · I4/mmm (139)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1360 K, x(Mn) 0.92308–0.92308	7	2
HOMN2 phase:ho-mn:homn2		needs_review	stable in 2 of 2 calculated diagram(s): 300–1418.98 K, x(Mn) 0.66667–0.66667	4	2
LIQUID phase:ho-mn:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1147.8–2500 K, x(Mn) 0–1	10	2

BCC_A2 (Ho–Mn)

Id: phase:ho-mn: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): 1390–2423.99 K, x(Mn) 0.98894–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:bcc-a2
paper: paper:10.1016/j.jallcom.2009.03.121:δMn
tdb: tdb:HoMn-09Wan.tdb:BCC_A2, tdb:HoMn-19Wan.tdb:BCC_A2

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

HoMn-09Wan.tdb: BCC_A2, type code %B, sha256 2940393e37b98527…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : HO MN% : VA : !

HoMn-19Wan.tdb: BCC_A2, type code %B, sha256 fa2c27efee585bad…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : HO MN% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

CBCC_A12 (Ho–Mn)

Id: phase:ho-mn: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): 300–1355 K, x(Mn) 0.99986–1
Literature: 2 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:cbcc-a12
paper: paper:10.1016/j.jallcom.2009.03.121:αMn
tdb: tdb:HoMn-09Wan.tdb:CBCC_A12, tdb:HoMn-19Wan.tdb:CBCC_A12

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

HoMn-09Wan.tdb: CBCC_A12, type code %A, sha256 2940393e37b98527…

45: PHASE CBCC_A12 %A 2 1 1 !
46: CONST CBCC_A12 : HO MN% : VA : !

HoMn-19Wan.tdb: CBCC_A12, type code %A, sha256 fa2c27efee585bad…

43: PHASE CBCC_A12 %A 2 1 1 !
44: CONST CBCC_A12 : MN : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

CUB_A13 (Ho–Mn)

Id: phase:ho-mn: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): 979.33–1404.99 K, x(Mn) 0.99298–1
Literature: 3 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:cub-a13
paper: paper:10.1016/j.jallcom.2009.03.121:βMn
tdb: tdb:HoMn-09Wan.tdb:CUB_A13, tdb:HoMn-19Wan.tdb:CUB_A13

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

HoMn-09Wan.tdb: CUB_A13, type code %, sha256 2940393e37b98527…

50: PHASE CUB_A13 % 2 1 1 !
51: CONST CUB_A13 : HO MN% : VA : !

HoMn-19Wan.tdb: CUB_A13, type code %, sha256 fa2c27efee585bad…

48: PHASE CUB_A13 % 2 1 1 !
49: CONST CUB_A13 : MN : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

FCC_A1 (Ho–Mn)

Id: phase:ho-mn: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): 1344.63–1426 K, x(Mn) 0.98945–1
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:fcc-a1
paper: paper:10.1016/j.jallcom.2009.03.121:γMn
tdb: tdb:HoMn-09Wan.tdb:FCC_A1, tdb:HoMn-19Wan.tdb:FCC_A1

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

HoMn-09Wan.tdb: FCC_A1, type code %A, sha256 2940393e37b98527…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : HO MN% : VA : !

HoMn-19Wan.tdb: FCC_A1, type code %A, sha256 fa2c27efee585bad…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : HO MN% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

HCP_A3 (Ho–Mn)

Id: phase:ho-mn: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 2 of 2 calculated diagram(s): 300–1787.8 K, x(Mn) 0–0.00171
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:hcp-a3
paper: paper:10.1016/j.jallcom.2009.03.121:(Ho)
tdb: tdb:HoMn-09Wan.tdb:HCP_A3, tdb:HoMn-19Wan.tdb:HCP_A3

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

HoMn-09Wan.tdb: HCP_A3, type code %A, sha256 2940393e37b98527…

40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : HO% MN : VA : !

HoMn-19Wan.tdb: HCP_A3, type code %A, sha256 fa2c27efee585bad…

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

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

HO6MN23_D8A (Ho–Mn)

Id: phase:ho-mn:ho6mn23-d8a; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:models_disagree_on_composition; models_disagree_on_composition; stoichiometry_contradicts_D8_a:HoMn-09Wan.tdb
Candidate (literature_printed): Mn23Th6 · cF116 — printed with a label mapped to this phase
Candidate (name_token): Mn23Th6 · D8_a · cF116 · Fm-3m (225) — Strukturbericht/word 'D8A' in the TDB name
Candidate (sgte_mmc2): Mn23Th6 · D8_a · cF116 · Fm-3m (225) — Hallstedt 2025 mmc2 row for HO6MN23_D8A: Ho6Mn23
Candidate (tdb_comment): Mn23Th6 · cF116 · Fm-3m — HoMn-09Wan.tdb: 'Prototype Mn23Th6 (cF116, Fm-3m)'
Candidate (tdb_comment): Mn23Th6 · cF116 · Fm-3m — HoMn-19Wan.tdb: 'Prototype Mn23Th6 (cF116, Fm-3m)'
Stability: stable in 2 of 2 calculated diagram(s): 300–1396.77 K, x(Mn) 0.793–0.7931
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:ho6mn23-d8a
paper: paper:10.1016/j.jallcom.2009.03.121:Ho6Mn23
tdb: tdb:HoMn-09Wan.tdb:HO6MN23_D8A, tdb:HoMn-19Wan.tdb:HO6MN23_D8A

TDB models of HO6MN23_D8A (2): PHASE and CONSTITUENT statements as written

HoMn-09Wan.tdb: HO6MN23_D8A, type code %A, sha256 2940393e37b98527…

62: PHASE HO6MN23_D8A %A 2 0.793 0.207 !
63: CONST HO6MN23_D8A : MN : HO : !

HoMn-19Wan.tdb: HO6MN23_D8A, type code %A, sha256 fa2c27efee585bad…

60: PHASE HO6MN23_D8A %A 2 23 6 !
61: CONST HO6MN23_D8A : MN : HO : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

HOMN12_D2B (Ho–Mn)

Id: phase:ho-mn:homn12-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-aaaaautb and oqmd-5137, space group 139
Stoichiometry: Ho 0.0769, Mn 0.9231
Stability: stable in 2 of 2 calculated diagram(s): 300–1360 K, x(Mn) 0.92308–0.92308
Literature: 7 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ho-mn:homn12-d2b
mp: mp:mp-aaaaautb
oqmd: oqmd:oqmd-5137
paper: paper:10.1016/j.jallcom.2009.03.121:HoMn12
tdb: tdb:HoMn-09Wan.tdb:HOMN12_D2B, tdb:HoMn-19Wan.tdb:HOMN12_D2B

TDB models of HOMN12_D2B (2): PHASE and CONSTITUENT statements as written

HoMn-09Wan.tdb: HOMN12_D2B, type code %A, sha256 2940393e37b98527…

67: PHASE HOMN12_D2B %A 2 12 1 !
68: CONST HOMN12_D2B : MN : HO : !

HoMn-19Wan.tdb: HOMN12_D2B, type code %, sha256 fa2c27efee585bad…

65: PHASE HOMN12_D2B % 2 12 1 !
66: CONST HOMN12_D2B : MN : HO : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

HOMN2 (Ho–Mn)

Id: phase:ho-mn:homn2; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_rows_disagree
Candidate (literature_printed): Cu2Mg · cF24 — printed with a label mapped to this phase
Candidate (sgte_mmc2): MgZn2 · C14 · hP12 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for HOMN2: HoMn2 (see also Cu2Mg)
Candidate (sgte_mmc2): Cu2Mg · C15 · cF24 · Fd-3m (227) — Hallstedt 2025 mmc2 row for HOMN2: HoMn2 (see also MgZn2)
Stoichiometry: Ho 0.3333, Mn 0.6667
Stability: stable in 2 of 2 calculated diagram(s): 300–1418.98 K, x(Mn) 0.66667–0.66667
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:homn2
paper: paper:10.1016/j.jallcom.2009.03.121:HoMn2
tdb: tdb:HoMn-09Wan.tdb:HOMN2, tdb:HoMn-19Wan.tdb:HOMN2

TDB models of HOMN2 (2): PHASE and CONSTITUENT statements as written

HoMn-09Wan.tdb: HOMN2, type code %, sha256 2940393e37b98527…

57: PHASE HOMN2 % 2 2 1 !
58: CONST HOMN2 : MN : HO : !

HoMn-19Wan.tdb: HOMN2, type code %, sha256 fa2c27efee585bad…

55: PHASE HOMN2 % 2 2 1 !
56: CONST HOMN2 : MN : HO : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
assessment that models this phase

LIQUID (Ho–Mn)

Id: phase:ho-mn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1147.8–2500 K, x(Mn) 0–1
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ho-mn:liquid
paper: paper:10.1016/j.jallcom.2009.03.121:L
tdb: tdb:HoMn-09Wan.tdb:LIQUID, tdb:HoMn-19Wan.tdb:LIQUID

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

HoMn-09Wan.tdb: LIQUID, type code %, sha256 2940393e37b98527…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : HO MN : !

HoMn-19Wan.tdb: LIQUID, type code %, sha256 fa2c27efee585bad…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : HO MN : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.03.121 C.P. Wang, H.L. Zhang, S.L. Wang, Z. Lin, X.J. Liu, A.T. Tang et al., Thermodynamic assessments of the Mn–Sm and Mn–Ho systems, Journal of Alloys and Compounds 481, 291-295 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2019.101635 J. Wang, M. Qian, K.C. Yang, B. Wen, Z. Lu, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 66, 101635(2019).
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}
}