Er–Mn phases

9 phases (tier A 8, 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 · Er–Mn system page · Markdown · field reference

Phases of the Er–Mn system (9)
Phase	Structure	Basis	Stability (calculated)	TDB models
BCC_A2 phase:er-mn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1410.75–1525.75 K, x(Mn) 0.99997–1	1
CBCC_A12 phase:er-mn:cbcc-a12	alpha-Mn · A12 · cI58 · I-43m (217)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–980 K, x(Mn) 1–1	1
CUB_A13 phase:er-mn:cub-a13	beta-Mn · A13 · cP20 · P4_132 (213)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 980–1359.99 K, x(Mn) 1–1	1
ER6MN23_D8A phase:er-mn:er6mn23-d8a	Mn23Th6 · D8_a · cF116 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1402.78 K, x(Mn) 0.7931–0.7931	1
ERMN12_D2B phase:er-mn:ermn12-d2b	Mn12Th · D2_b · tI26 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1349.16 K, x(Mn) 0.92308–0.92308	1
ERMN2_C14 phase:er-mn:ermn2-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1420.24 K, x(Mn) 0.66667–0.66667	1
FCC_A1 phase:er-mn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1359.99–1515.75 K, x(Mn) 1–1	1
HCP_A3 phase:er-mn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1806.14 K, x(Mn) 0–0.00016	1
LIQUID phase:er-mn:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1211.14–2500 K, x(Mn) 0–1	1

BCC_A2 (Er–Mn)

Id: phase:er-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 1 of 1 calculated diagram(s): 1410.75–1525.75 K, x(Mn) 0.99997–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:bcc-a2
tdb: tdb:ErMn-24Ye.tdb:BCC_A2

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

ErMn-24Ye.tdb: BCC_A2, type code %B, sha256 6f321b4ac1452fc2…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : ER MN% : VA : !

Example references (1 of 1; assessments first):

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

CBCC_A12 (Er–Mn)

Id: phase:er-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
Stoichiometry: Mn 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–980 K, x(Mn) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:cbcc-a12
tdb: tdb:ErMn-24Ye.tdb:CBCC_A12

TDB models of CBCC_A12 (1): PHASE and CONSTITUENT statements as written

ErMn-24Ye.tdb: CBCC_A12, type code %A, sha256 6f321b4ac1452fc2…

40: PHASE CBCC_A12 %A 2 1 1 !
41: CONST CBCC_A12 : MN : VA : !

Example references (1 of 1; assessments first):

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 (Er–Mn)

Id: phase:er-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
Stoichiometry: Mn 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 980–1359.99 K, x(Mn) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:cub-a13
tdb: tdb:ErMn-24Ye.tdb:CUB_A13

TDB models of CUB_A13 (1): PHASE and CONSTITUENT statements as written

ErMn-24Ye.tdb: CUB_A13, type code %, sha256 6f321b4ac1452fc2…

45: PHASE CUB_A13 % 2 1 1 !
46: CONST CUB_A13 : MN : VA : !

Example references (1 of 1; assessments first):

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

ER6MN23_D8A (Er–Mn)

Id: phase:er-mn:er6mn23-d8a; status assigned
Structure: Mn23Th6 · D8_a · cF116 · Fm-3m (225); type st:d8-a-mn23th6-cf116; tier A: standard phase name; confidence high
Stoichiometry: Er 0.2069, Mn 0.7931
Stability: stable in 1 of 1 calculated diagram(s): 300–1402.78 K, x(Mn) 0.7931–0.7931
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:er6mn23-d8a
tdb: tdb:ErMn-24Ye.tdb:ER6MN23_D8A

TDB models of ER6MN23_D8A (1): PHASE and CONSTITUENT statements as written

ErMn-24Ye.tdb: ER6MN23_D8A, type code %A, sha256 6f321b4ac1452fc2…

55: PHASE ER6MN23_D8A %A 2 6 23 !
56: CONST ER6MN23_D8A : ER : MN : !

Example references (1 of 1; assessments first):

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

ERMN12_D2B (Er–Mn)

Id: phase:er-mn:ermn12-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-aaaabhgs and oqmd-5138, space group 139
Stoichiometry: Er 0.0769, Mn 0.9231
Stability: stable in 1 of 1 calculated diagram(s): 300–1349.16 K, x(Mn) 0.92308–0.92308
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:er-mn:ermn12-d2b
mp: mp:mp-aaaabhgs
oqmd: oqmd:oqmd-5138
tdb: tdb:ErMn-24Ye.tdb:ERMN12_D2B

TDB models of ERMN12_D2B (1): PHASE and CONSTITUENT statements as written

ErMn-24Ye.tdb: ERMN12_D2B, type code %, sha256 6f321b4ac1452fc2…

60: PHASE ERMN12_D2B % 2 1 12 !
61: CONST ERMN12_D2B : ER : MN : !

Example references (1 of 1; assessments first):

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

ERMN2_C14 (Er–Mn)

Id: phase:er-mn:ermn2-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Stoichiometry: Er 0.3333, Mn 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1420.24 K, x(Mn) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:ermn2-c14
tdb: tdb:ErMn-24Ye.tdb:ERMN2_C14

TDB models of ERMN2_C14 (1): PHASE and CONSTITUENT statements as written

ErMn-24Ye.tdb: ERMN2_C14, type code %, sha256 6f321b4ac1452fc2…

50: PHASE ERMN2_C14 % 2 1 2 !
51: CONST ERMN2_C14 : ER : MN : !

Example references (1 of 1; assessments first):

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

FCC_A1 (Er–Mn)

Id: phase:er-mn:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Mn 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 1359.99–1515.75 K, x(Mn) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:fcc-a1
tdb: tdb:ErMn-24Ye.tdb:FCC_A1

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

ErMn-24Ye.tdb: FCC_A1, type code %A, sha256 6f321b4ac1452fc2…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : MN : VA : !

Example references (1 of 1; assessments first):

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

HCP_A3 (Er–Mn)

Id: phase:er-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 1 calculated diagram(s): 300–1806.14 K, x(Mn) 0–0.00016
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:hcp-a3
tdb: tdb:ErMn-24Ye.tdb:HCP_A3

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

ErMn-24Ye.tdb: HCP_A3, type code %A, sha256 6f321b4ac1452fc2…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : ER% MN : VA : !

Example references (1 of 1; assessments first):

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

LIQUID (Er–Mn)

Id: phase:er-mn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1211.14–2500 K, x(Mn) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:er-mn:liquid
tdb: tdb:ErMn-24Ye.tdb:LIQUID

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

ErMn-24Ye.tdb: LIQUID, type code %, sha256 6f321b4ac1452fc2…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : ER MN : !

Example references (1 of 1; assessments first):

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}
}