Hf–Mn phases

9 phases (tier A 7, tier C 1, liquid 1); 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 · Hf–Mn system page · Markdown · field reference

Phases of the Hf–Mn system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:hf-mn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1389.46–3999 K, x(Mn) 0–1	5	2
C14_LAVES phase:hf-mn:c14-laves	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1993.64 K, x(Mn) 0.63086–0.7451	4	1
CBCC_A12 phase:hf-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) 0.99817–1	2	2
CUB_A13 phase:hf-mn:cub-a13	beta-Mn · A13 · cP20 · P4_132 (213)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300.04–1411.49 K, x(Mn) 0.98186–1	4	2
FCC_A1 phase:hf-mn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 985.48–1411 K, x(Mn) 0.99979–1	0	2
HCP_A3 phase:hf-mn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2017.02 K, x(Mn) 0–0.0435	2	2
HFMN phase:hf-mn:hfmn	NiTi2 · cF96 · Fd-3m (227)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1570.7 K, x(Mn) 0.5–0.5	4	1
HFMN2_C14 phase:hf-mn:hfmn2-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2000 K, x(Mn) 0.62856–0.75378	10	1
LIQUID phase:hf-mn:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1481.02–4000 K, x(Mn) 0–1	13	2

BCC_A2 (Hf–Mn)

Id: phase:hf-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): 1389.46–3999 K, x(Mn) 0–1
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:hf-mn:bcc-a2
paper: paper:10.1007/s11669-011-9976-9:βHf, paper:10.1007/s11669-011-9976-9:δMn
tdb: tdb:HfMn-12Zho.tdb:BCC_A2, tdb:HfMn-24Bro.tdb:BCC_A2

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

HfMn-12Zho.tdb: BCC_A2, type code %B, sha256 13bc2c3266d585e0…

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

HfMn-24Bro.tdb: BCC_A2, type code %B, sha256 bd5d0eb030cc8487…

37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : HF% MN% : VA : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
assessment that models this phase
doi:10.1007/bf02645298 H. Okamoto, The Hf-Mn (hafnium-manganese) system, JPE 16, 361-363 (1995).
cited as the source of values for this phase

C14_LAVES (Hf–Mn)

Id: phase:hf-mn:c14-laves; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in HfMn-24Bro.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–1993.64 K, x(Mn) 0.63086–0.7451
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:hf-mn:c14-laves
paper: paper:10.1016/j.jallcom.2023.173060:αHfMn2
tdb: tdb:HfMn-24Bro.tdb:C14_LAVES

TDB models of C14_LAVES (1): PHASE and CONSTITUENT statements as written

HfMn-24Bro.tdb: C14_LAVES, type code %, sha256 bd5d0eb030cc8487…

57: PHASE C14_LAVES % 2 2 1 !
58: CONST C14_LAVES : HF MN% : HF% MN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
assessment that models this phase; reports values for this phase

CBCC_A12 (Hf–Mn)

Id: phase:hf-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) 0.99817–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:hf-mn:cbcc-a12
paper: paper:10.1007/s11669-011-9976-9:αMn
tdb: tdb:HfMn-12Zho.tdb:CBCC_A12, tdb:HfMn-24Bro.tdb:CBCC_A12

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

HfMn-12Zho.tdb: CBCC_A12, type code %A, sha256 13bc2c3266d585e0…

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

HfMn-24Bro.tdb: CBCC_A12, type code %A, sha256 bd5d0eb030cc8487…

47: PHASE CBCC_A12 %A 2 1 1 !
48: CONST CBCC_A12 : HF MN% : VA : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
assessment that models this phase
doi:10.1007/bf02645298 H. Okamoto, The Hf-Mn (hafnium-manganese) system, JPE 16, 361-363 (1995).
cited as the source of values for this phase

CUB_A13 (Hf–Mn)

Id: phase:hf-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): 300.04–1411.49 K, x(Mn) 0.98186–1
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:hf-mn:cub-a13
paper: paper:10.1007/s11669-011-9976-9:βMn
tdb: tdb:HfMn-12Zho.tdb:CUB_A13, tdb:HfMn-24Bro.tdb:CUB_A13

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

HfMn-12Zho.tdb: CUB_A13, type code %, sha256 13bc2c3266d585e0…

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

HfMn-24Bro.tdb: CUB_A13, type code %, sha256 bd5d0eb030cc8487…

52: PHASE CUB_A13 % 2 1 1 !
53: CONST CUB_A13 : HF MN% : VA : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
assessment that models this phase
doi:10.1007/bf02645298 H. Okamoto, The Hf-Mn (hafnium-manganese) system, JPE 16, 361-363 (1995).
cited as the source of values for this phase

FCC_A1 (Hf–Mn)

Id: phase:hf-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): 985.48–1411 K, x(Mn) 0.99979–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:hf-mn:fcc-a1
tdb: tdb:HfMn-12Zho.tdb:FCC_A1, tdb:HfMn-24Bro.tdb:FCC_A1

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

HfMn-12Zho.tdb: FCC_A1, type code %A, sha256 13bc2c3266d585e0…

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

HfMn-24Bro.tdb: FCC_A1, type code %A, sha256 bd5d0eb030cc8487…

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

Example references (2 of 2; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase
doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
assessment that models this phase

HCP_A3 (Hf–Mn)

Id: phase:hf-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): 300–2017.02 K, x(Mn) 0–0.0435
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:hf-mn:hcp-a3
paper: paper:10.1007/s11669-011-9976-9:αHf
tdb: tdb:HfMn-12Zho.tdb:HCP_A3, tdb:HfMn-24Bro.tdb:HCP_A3

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

HfMn-12Zho.tdb: HCP_A3, type code %, sha256 13bc2c3266d585e0…

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

HfMn-24Bro.tdb: HCP_A3, type code %, sha256 bd5d0eb030cc8487…

42: PHASE HCP_A3 % 2 1 0.5 !
43: CONST HCP_A3 : HF% MN : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
assessment that models this phase

HFMN (Hf–Mn)

Id: phase:hf-mn:hfmn; status assigned
Structure: NiTi2 · cF96 · Fd-3m (227); type st:niti2-cf96; 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: Hf 0.5000, Mn 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1570.7 K, x(Mn) 0.5–0.5
Literature: 4 values (4 accepted) from 2 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:hf-mn:hfmn
paper: paper:10.1007/s11669-011-9976-9:HfMn, paper:10.1016/j.jallcom.2023.173060:HfMn
tdb: tdb:HfMn-12Zho.tdb:HFMN

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

HfMn-12Zho.tdb: HFMN, type code %, sha256 13bc2c3266d585e0…

53: PHASE HFMN % 2 1 1 !
54: CONST HFMN : HF : MN : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02645298 H. Okamoto, The Hf-Mn (hafnium-manganese) system, JPE 16, 361-363 (1995).
cited as the source of values for this phase
doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
reports values for this phase

HFMN2_C14 (Hf–Mn)

Id: phase:hf-mn:hfmn2-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in HfMn-12Zho.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–2000 K, x(Mn) 0.62856–0.75378
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:hf-mn:hfmn2-c14
paper: paper:10.1007/s11669-011-9976-9:HfMn2
tdb: tdb:HfMn-12Zho.tdb:HFMN2_C14

TDB models of HFMN2_C14 (1): PHASE and CONSTITUENT statements as written

HfMn-12Zho.tdb: HFMN2_C14, type code %, sha256 13bc2c3266d585e0…

58: PHASE HFMN2_C14 % 2 1 2 !
59: CONST HFMN2_C14 : HF% MN : HF MN% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02645298 H. Okamoto, The Hf-Mn (hafnium-manganese) system, JPE 16, 361-363 (1995).
cited as the source of values for this phase

LIQUID (Hf–Mn)

Id: phase:hf-mn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1481.02–4000 K, x(Mn) 0–1
Literature: 13 values (9 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:hf-mn:liquid
paper: paper:10.1007/s11669-011-9976-9:L, paper:10.1016/j.jallcom.2023.173060:liquid
tdb: tdb:HfMn-12Zho.tdb:LIQUID, tdb:HfMn-24Bro.tdb:LIQUID

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

HfMn-12Zho.tdb: LIQUID, type code %, sha256 13bc2c3266d585e0…

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

HfMn-24Bro.tdb: LIQUID, type code %, sha256 bd5d0eb030cc8487…

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

Example references (3 of 3; assessments first):

doi:10.1007/s11669-011-9976-9 Peng Zhou, Shuhong Liu, Peisheng Wang, Honghui Xu, Yingbiao Peng, Xiaoming Yuan et al., Experimental Investigation and Thermodynamic Assessment of the Hf-Mn System, J. Phase Equilib. Diffus. 33, 20-28 (2012).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2023.173060 Pavel Brož, Xinlin Yan, Vitaliy Romaka, Olga Fabrichnaya, Mario J. Kriegel, Vilma Buršíková et al., Constitution, physical properties and thermodynamic modeling of the Hf-Mn system, Journal of Alloys and Compounds 976, 173060 (2024).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02645298 H. Okamoto, The Hf-Mn (hafnium-manganese) system, JPE 16, 361-363 (1995).
cited as the source of values for 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}
}