H–Mn phases

8 phases (tier A 5, liquid 1, gas 2); 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 · full JSON · H–Mn system page · Markdown · field reference

Phases of the H–Mn system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:h-mn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1410.37–2334 K, x(H) 0–0.00203	4	2
CBCC_A12 phase:h-mn:cbcc-a12	alpha-Mn · A12 · cI58 · I-43m (217)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–980 K, x(H) 0–0.00076	2	2
CUB_A13 phase:h-mn:cub-a13	beta-Mn · A13 · cP20 · P4_132 (213)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 977.19–1359.99 K, x(H) 0–0.00164	4	2
FCC_A1 phase:h-mn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1358.05–1415.18 K, x(H) 0–0.002	4	2
GAS phase:h-mn:gas	gas	gas	stable in 2 of 2 calculated diagram(s): 300–2500 K, x(H) 0–1	6	2
H2GAS phase:h-mn:h2gas	gas	gas	stable in 1 of 2 calculated diagram(s): 300.44–771.69 K, x(H) 1–1	0	2
HCP_A3 phase:h-mn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 2 calculated diagram(s): 300–396.69 K, x(H) 0.47216–0.49531	0	2
LIQUID phase:h-mn:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1515.26–2339.53 K, x(H) 0–0.00454	2	2

BCC_A2 (H–Mn)

Id: phase:h-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): 1410.37–2334 K, x(H) 0–0.00203
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:h-mn:bcc-a2
paper: paper:10.1007/s11669-018-0622-7:(δMn)
tdb: tdb:MnH-11Lob.tdb:BCC_A2, tdb:MnH-18Lia.tdb:BCC_A2

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

MnH-11Lob.tdb: BCC_A2, type code %B, sha256 d20c86d703fa6e37…

38: PHASE BCC_A2 %B 2 1 1 !
39: CONST BCC_A2 : MN : H VA% : !

MnH-18Lia.tdb: BCC_A2, type code %B, sha256 ee68c7da6eef802b…

40: PHASE BCC_A2 %B 2 1 3 !
41: CONST BCC_A2 : MN : H VA% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase; reports values for this phase
doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
assessment that models this phase

CBCC_A12 (H–Mn)

Id: phase:h-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): 300–980 K, x(H) 0–0.00076
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:h-mn:cbcc-a12
paper: paper:10.1007/s11669-018-0622-7:(αMn)
tdb: tdb:MnH-11Lob.tdb:CBCC_A12, tdb:MnH-18Lia.tdb:CBCC_A12

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

MnH-11Lob.tdb: CBCC_A12, type code %, sha256 d20c86d703fa6e37…

48: PHASE CBCC_A12 % 2 1 1 !
49: CONST CBCC_A12 : MN : H VA% : !

MnH-18Lia.tdb: CBCC_A12, type code %, sha256 ee68c7da6eef802b…

50: PHASE CBCC_A12 % 2 1 1 !
51: CONST CBCC_A12 : MN : H VA% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase; reports values for this phase
doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
assessment that models this phase

CUB_A13 (H–Mn)

Id: phase:h-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): 977.19–1359.99 K, x(H) 0–0.00164
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:h-mn:cub-a13
paper: paper:10.1007/s11669-018-0622-7:(βMn)
tdb: tdb:MnH-11Lob.tdb:CUB_A13, tdb:MnH-18Lia.tdb:CUB_A13

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

MnH-11Lob.tdb: CUB_A13, type code %, sha256 d20c86d703fa6e37…

53: PHASE CUB_A13 % 2 1 1 !
54: CONST CUB_A13 : MN : H VA% : !

MnH-18Lia.tdb: CUB_A13, type code %, sha256 ee68c7da6eef802b…

55: PHASE CUB_A13 % 2 1 1 !
56: CONST CUB_A13 : MN : H VA% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase; reports values for this phase
doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
assessment that models this phase

FCC_A1 (H–Mn)

Id: phase:h-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): 1358.05–1415.18 K, x(H) 0–0.002
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:h-mn:fcc-a1
paper: paper:10.1007/s11669-018-0622-7:(γMn)
tdb: tdb:MnH-11Lob.tdb:FCC_A1, tdb:MnH-18Lia.tdb:FCC_A1

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

MnH-11Lob.tdb: FCC_A1, type code %A, sha256 d20c86d703fa6e37…

32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : MN : H VA% : !

MnH-18Lia.tdb: FCC_A1, type code %A, sha256 ee68c7da6eef802b…

35: PHASE FCC_A1 %A 2 1 1 !
36: CONST FCC_A1 : MN : H VA% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase; reports values for this phase
doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
assessment that models this phase

GAS (H–Mn)

Id: phase:h-mn:gas; status assigned
Structure: gas; type st:gas; gas; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 300–2500 K, x(H) 0–1
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:h-mn:gas
paper: paper:10.1007/s11669-018-0622-7:Gas
tdb: tdb:MnH-11Lob.tdb:GAS, tdb:MnH-18Lia.tdb:GAS

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

MnH-11Lob.tdb: GAS, type code %, sha256 d20c86d703fa6e37…

56: PHASE GAS:G % 1 1 !
57: CONST GAS:G : H H2 MN MNH : !

MnH-18Lia.tdb: GAS, type code %, sha256 ee68c7da6eef802b…

58: PHASE GAS:G % 1 1 !
59: CONST GAS:G : H H2 MN MNH : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase; reports values for this phase
doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
assessment that models this phase

H2GAS (H–Mn)

Id: phase:h-mn:h2gas; status assigned
Structure: gas; type st:gas; gas; confidence high
Stability: stable in 1 of 2 calculated diagram(s): 300.44–771.69 K, x(H) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:h-mn:h2gas
tdb: tdb:MnH-11Lob.tdb:H2GAS, tdb:MnH-18Lia.tdb:H2GAS

TDB models of H2GAS (2): PHASE and CONSTITUENT statements as written

MnH-11Lob.tdb: H2GAS, type code %, sha256 d20c86d703fa6e37…

59: PHASE H2GAS % 1 1 !
60: CONST H2GAS : H2 : !

MnH-18Lia.tdb: H2GAS, type code %, sha256 ee68c7da6eef802b…

61: PHASE H2GAS % 1 1 !
62: CONST H2GAS : H2 : !

Example references (2 of 2; assessments first):

doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
assessment that models this phase
doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase

HCP_A3 (H–Mn)

Id: phase:h-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 1 of 2 calculated diagram(s): 300–396.69 K, x(H) 0.47216–0.49531
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:h-mn:hcp-a3
tdb: tdb:MnH-11Lob.tdb:HCP_A3, tdb:MnH-18Lia.tdb:HCP_A3

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

MnH-11Lob.tdb: HCP_A3, type code %A, sha256 d20c86d703fa6e37…

43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : MN : H VA% : !

MnH-18Lia.tdb: HCP_A3, type code %A, sha256 ee68c7da6eef802b…

45: PHASE HCP_A3 %A 2 1 1 !
46: CONST HCP_A3 : MN : H VA% : !

Example references (2 of 2; assessments first):

doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
assessment that models this phase
doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase

LIQUID (H–Mn)

Id: phase:h-mn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1515.26–2339.53 K, x(H) 0–0.00454
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:h-mn:liquid
paper: paper:10.1007/s11669-018-0622-7:L
tdb: tdb:MnH-11Lob.tdb:LIQUID, tdb:MnH-18Lia.tdb:LIQUID

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

MnH-11Lob.tdb: LIQUID, type code %, sha256 d20c86d703fa6e37…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : MN H : !

MnH-18Lia.tdb: LIQUID, type code %, sha256 ee68c7da6eef802b…

30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : MN H : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-018-0622-7 Yongpeng Liang, Shuhong Liu, Yong Du, Thermodynamic Assessment of the Mn-H and Mg-Mn-H Systems, J. Phase Equilib. Diffus. 39, 186-195 (2018).
assessment that models this phase; reports values for this phase
doi:10.1002/srin.201000262 A. Lob, D. Senk, B. Hallstedt, Steel Res. Int., 82, 108-13(2011).
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}
}