Mn–Sm phases

9 phases (tier A 7, liquid 1, needs_review 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 · Mn–Sm system page · Markdown · field reference

Phases of the Mn–Sm system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:mn-sm:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1170–2500 K, x(Sm) 0–1	6	2
CBCC_A12 phase:mn-sm: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(Sm) 0–2e-05	2	2
CUB_A13 phase:mn-sm:cub-a13	beta-Mn · A13 · cP20 · P4_132 (213)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 979.65–1369.17 K, x(Sm) 0–0.00135	7	2
FCC_A1 phase:mn-sm:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1334.17–1410.93 K, x(Sm) 0–9e-05	6	2
HCP_A3 phase:mn-sm:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1006.27–1195 K, x(Sm) 0.81–1	7	2
LIQUID phase:mn-sm:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1069.57–2500 K, x(Sm) 0–1	15	2
MN23SM6_D8A phase:mn-sm:mn23sm6-d8a		needs_review	stable in 2 of 2 calculated diagram(s): 300–1300 K, x(Sm) 0.2069–0.207	6	2
MN2SM_C14 phase:mn-sm:mn2sm-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1202.15 K, x(Sm) 0.33333–0.33333	6	2
RHOMB_C19 phase:mn-sm:rhomb-c19	CdCl2 · C19 · hR3 · R-3m (166)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1191.94 K, x(Sm) 0.99999–1	2	2

BCC_A2 (Mn–Sm)

Id: phase:mn-sm: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): 1170–2500 K, x(Sm) 0–1
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:mn-sm:bcc-a2
paper: paper:10.1016/j.jallcom.2009.03.121:γSm, paper:10.1016/j.jallcom.2009.03.121:δMn
tdb: tdb:MnSm-09Wan.tdb:BCC_A2, tdb:MnSm-24Ye.tdb:BCC_A2

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

MnSm-09Wan.tdb: BCC_A2, type code %B, sha256 47864add5c99ef02…

38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : MN% SM% : VA : !

MnSm-24Ye.tdb: BCC_A2, type code %B, sha256 8d057a826e346331…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : MN% SM% : VA : !

Example references (3 of 3; 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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase
doi:10.1515/ijmr-1970-610106 H.R. Kirchmayr, W. Lugscheider, Z. Metallkd. 61 (1970) 22–23.
cited as the source of values for this phase

CBCC_A12 (Mn–Sm)

Id: phase:mn-sm: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(Sm) 0–2e-05
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:cbcc-a12
paper: paper:10.1016/j.jallcom.2009.03.121:αMn
tdb: tdb:MnSm-09Wan.tdb:CBCC_A12, tdb:MnSm-24Ye.tdb:CBCC_A12

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

MnSm-09Wan.tdb: CBCC_A12, type code %A, sha256 47864add5c99ef02…

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

MnSm-24Ye.tdb: CBCC_A12, type code %A, sha256 8d057a826e346331…

44: PHASE CBCC_A12 %A 2 1 1 !
45: CONST CBCC_A12 : MN% SM : 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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase

CUB_A13 (Mn–Sm)

Id: phase:mn-sm: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): 979.65–1369.17 K, x(Sm) 0–0.00135
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:cub-a13
paper: paper:10.1016/j.jallcom.2009.03.121:βMn
tdb: tdb:MnSm-09Wan.tdb:CUB_A13, tdb:MnSm-24Ye.tdb:CUB_A13

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

MnSm-09Wan.tdb: CUB_A13, type code %, sha256 47864add5c99ef02…

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

MnSm-24Ye.tdb: CUB_A13, type code %, sha256 8d057a826e346331…

49: PHASE CUB_A13 % 2 1 1 !
50: CONST CUB_A13 : MN% SM : VA : !

Example references (3 of 3; 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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase
doi:10.1515/ijmr-1970-610106 H.R. Kirchmayr, W. Lugscheider, Z. Metallkd. 61 (1970) 22–23.
cited as the source of values for this phase

FCC_A1 (Mn–Sm)

Id: phase:mn-sm: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): 1334.17–1410.93 K, x(Sm) 0–9e-05
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:fcc-a1
paper: paper:10.1016/j.jallcom.2009.03.121:γMn
tdb: tdb:MnSm-09Wan.tdb:FCC_A1, tdb:MnSm-24Ye.tdb:FCC_A1

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

MnSm-09Wan.tdb: FCC_A1, type code %A, sha256 47864add5c99ef02…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : MN% SM : VA : !

MnSm-24Ye.tdb: FCC_A1, type code %A, sha256 8d057a826e346331…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : MN% SM : VA : !

Example references (3 of 3; 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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase
doi:10.1515/ijmr-1970-610106 H.R. Kirchmayr, W. Lugscheider, Z. Metallkd. 61 (1970) 22–23.
cited as the source of values for this phase

HCP_A3 (Mn–Sm)

Id: phase:mn-sm: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): 1006.27–1195 K, x(Sm) 0.81–1
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:hcp-a3
paper: paper:10.1016/j.jallcom.2009.03.121:βSm
tdb: tdb:MnSm-09Wan.tdb:HCP_A3, tdb:MnSm-24Ye.tdb:HCP_A3

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

MnSm-09Wan.tdb: HCP_A3, type code %A, sha256 47864add5c99ef02…

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

MnSm-24Ye.tdb: HCP_A3, type code %A, sha256 8d057a826e346331…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : MN SM% : VA : !

Example references (3 of 3; 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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase
doi:10.1515/ijmr-1970-610106 H.R. Kirchmayr, W. Lugscheider, Z. Metallkd. 61 (1970) 22–23.
cited as the source of values for this phase

LIQUID (Mn–Sm)

Id: phase:mn-sm:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1069.57–2500 K, x(Sm) 0–1
Literature: 15 values (15 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:liquid
paper: paper:10.1016/j.jallcom.2009.03.121:L
tdb: tdb:MnSm-09Wan.tdb:LIQUID, tdb:MnSm-24Ye.tdb:LIQUID

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

MnSm-09Wan.tdb: LIQUID, type code %, sha256 47864add5c99ef02…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : MN SM : !

MnSm-24Ye.tdb: LIQUID, type code %, sha256 8d057a826e346331…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : MN SM : !

Example references (3 of 3; 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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase
doi:10.1515/ijmr-1970-610106 H.R. Kirchmayr, W. Lugscheider, Z. Metallkd. 61 (1970) 22–23.
cited as the source of values for this phase

MN23SM6_D8A (Mn–Sm)

Id: phase:mn-sm:mn23sm6-d8a; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:models_disagree_on_composition; models_disagree_on_composition; stoichiometry_contradicts_D8_a:MnSm-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 MN23SM6_D8A: Mn23Sm6
Candidate (tdb_comment): Mn23Th6 · cF116 · Fm-3m — MnSm-09Wan.tdb: 'Prototype Mn23Th6 (cF116, Fm-3m)'
Candidate (tdb_comment): Mn23Th6 · cF116 · Fm-3m — MnSm-24Ye.tdb: 'Prototype Mn23Th6 (cF116, Fm-3m)'
Stability: stable in 2 of 2 calculated diagram(s): 300–1300 K, x(Sm) 0.2069–0.207
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:mn23sm6-d8a
paper: paper:10.1016/j.jallcom.2009.03.121:Mn23Sm6
tdb: tdb:MnSm-09Wan.tdb:MN23SM6_D8A, tdb:MnSm-24Ye.tdb:MN23SM6_D8A

TDB models of MN23SM6_D8A (2): PHASE and CONSTITUENT statements as written

MnSm-09Wan.tdb: MN23SM6_D8A, type code %A, sha256 47864add5c99ef02…

63: PHASE MN23SM6_D8A %A 2 0.793 0.207 !
64: CONST MN23SM6_D8A : MN : SM : !

MnSm-24Ye.tdb: MN23SM6_D8A, type code %A, sha256 8d057a826e346331…

59: PHASE MN23SM6_D8A %A 2 23 6 !
60: CONST MN23SM6_D8A : MN : SM : !

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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase

MN2SM_C14 (Mn–Sm)

Id: phase:mn-sm:mn2sm-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Stoichiometry: Mn 0.6667, Sm 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–1202.15 K, x(Sm) 0.33333–0.33333
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:mn2sm-c14
paper: paper:10.1016/j.jallcom.2009.03.121:Mn2Sm
tdb: tdb:MnSm-09Wan.tdb:MN2SM_C14, tdb:MnSm-24Ye.tdb:MN2SM_C14

TDB models of MN2SM_C14 (2): PHASE and CONSTITUENT statements as written

MnSm-09Wan.tdb: MN2SM_C14, type code %, sha256 47864add5c99ef02…

68: PHASE MN2SM_C14 % 2 2 1 !
69: CONST MN2SM_C14 : MN : SM : !

MnSm-24Ye.tdb: MN2SM_C14, type code %, sha256 8d057a826e346331…

64: PHASE MN2SM_C14 % 2 2 1 !
65: CONST MN2SM_C14 : MN : SM : !

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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
assessment that models this phase

RHOMB_C19 (Mn–Sm)

Id: phase:mn-sm:rhomb-c19; status assigned
Structure: CdCl2 · C19 · hR3 · R-3m (166); type st:c19-cdcl2-hr3; tier A: standard phase name; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 300–1191.94 K, x(Sm) 0.99999–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mn-sm:rhomb-c19
paper: paper:10.1016/j.jallcom.2009.03.121:αSm
tdb: tdb:MnSm-09Wan.tdb:RHOMB_C19, tdb:MnSm-24Ye.tdb:RHOMB_C19

TDB models of RHOMB_C19 (2): PHASE and CONSTITUENT statements as written

MnSm-09Wan.tdb: RHOMB_C19, type code %, sha256 47864add5c99ef02…

58: PHASE RHOMB_C19 % 1 1 !
59: CONST RHOMB_C19 : MN SM% : !

MnSm-24Ye.tdb: RHOMB_C19, type code %, sha256 8d057a826e346331…

54: PHASE RHOMB_C19 % 1 1 !
55: CONST RHOMB_C19 : MN SM% : !

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:10.1002/mgea.39 Hongjian Ye, Jiang Wang, Qing Chen, Guanghui Rao, Huaiying Zhou, Development of thermodynamic database of the Mn‐RE (RE = rare earth metals) binary systems, Materials Genome Engineering Advances 2 (2024).
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}
}