# Lu–Mn phases > Lu–Mn system: 9 phases (tier A 7, tier C 1, liquid 1); 9 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/LU-MN.html · Markdown: https://data.orchid-project.org/phases/pages/LU-MN.md 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](https://orchid-project.org/phases/?q=LU-MN) · [full JSON](https://data.orchid-project.org/phases/systems/LU-MN.json) · [Lu–Mn system page](https://data.orchid-project.org/systems/LU-MN.html) · [Markdown](https://data.orchid-project.org/phases/pages/LU-MN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Lu–Mn system (9) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-lu-mn-bcc-a2); _phase:lu-mn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1411.01–2499.76 K, x(Mn) 1–1 | 0 | 1 | | [CBCC_A12](#phase-lu-mn-cbcc-a12); _phase:lu-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 | 0 | 1 | | [CUB_A13](#phase-lu-mn-cub-a13); _phase:lu-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 | 0 | 1 | | [FCC_A1](#phase-lu-mn-fcc-a1); _phase:lu-mn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1359.99–1411.01 K, x(Mn) 1–1 | 0 | 1 | | [HCP_A3](#phase-lu-mn-hcp-a3); _phase:lu-mn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1952.11 K, x(Mn) 0–0.00041 | 0 | 1 | | [LIQUID](#phase-lu-mn-liquid); _phase:lu-mn:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1255.86–2500 K, x(Mn) 0–1 | 0 | 1 | | [LU6MN23_D8A](#phase-lu-mn-lu6mn23-d8a); _phase:lu-mn:lu6mn23-d8a_ | Mn23Th6 · D8_a · cF116 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1455.52 K, x(Mn) 0.7931–0.7931 | 0 | 1 | | [LUMN2_C14](#phase-lu-mn-lumn2-c14); _phase:lu-mn:lumn2-c14_ | MgZn2 · C14 · hP12 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1460.26 K, x(Mn) 0.66667–0.66667 | 0 | 1 | | [LUMN5](#phase-lu-mn-lumn5); _phase:lu-mn:lumn5_ | LuMn5 · hP12 · P6_3mc (186) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1405.9 K, x(Mn) 0.83333–0.83333 | 0 | 1 | ## BCC_A2 (Lu–Mn) - Id: `phase:lu-mn:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high - Stoichiometry: Mn 1.0000 - Stability: stable in 1 of 1 calculated diagram(s): 1411.01–2499.76 K, x(Mn) 1–1 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-mn:bcc-a2) Names (2): _corpus: _corpus:phase:lu-mn:bcc-a2 _tdb: _tdb:LuMn-24Ye.tdb:BCC_A2 ### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): BCC_A2, type code %B, sha256 `68fc5f07bf36f926…` ~~~~text 30: PHASE BCC_A2 %B 2 1 3 ! 31: CONST BCC_A2 : MN : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1002/mgea.39](https://doi.org/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 (Lu–Mn) - Id: `phase:lu-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](https://orchid-project.org/phases/#phase:lu-mn:cbcc-a12) Names (2): _corpus: _corpus:phase:lu-mn:cbcc-a12 _tdb: _tdb:LuMn-24Ye.tdb:CBCC_A12 ### TDB models of CBCC_A12 (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): CBCC_A12, type code %A, sha256 `68fc5f07bf36f926…` ~~~~text 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](https://doi.org/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 (Lu–Mn) - Id: `phase:lu-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](https://orchid-project.org/phases/#phase:lu-mn:cub-a13) Names (2): _corpus: _corpus:phase:lu-mn:cub-a13 _tdb: _tdb:LuMn-24Ye.tdb:CUB_A13 ### TDB models of CUB_A13 (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): CUB_A13, type code %, sha256 `68fc5f07bf36f926…` ~~~~text 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](https://doi.org/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 (Lu–Mn) - Id: `phase:lu-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): 1359.99–1411.01 K, x(Mn) 1–1 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-mn:fcc-a1) Names (2): _corpus: _corpus:phase:lu-mn:fcc-a1 _tdb: _tdb:LuMn-24Ye.tdb:FCC_A1 ### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): FCC_A1, type code %A, sha256 `68fc5f07bf36f926…` ~~~~text 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](https://doi.org/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 (Lu–Mn) - Id: `phase:lu-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): 300–1952.11 K, x(Mn) 0–0.00041 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-mn:hcp-a3) Names (2): _corpus: _corpus:phase:lu-mn:hcp-a3 _tdb: _tdb:LuMn-24Ye.tdb:HCP_A3 ### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): HCP_A3, type code %A, sha256 `68fc5f07bf36f926…` ~~~~text 35: PHASE HCP_A3 %A 2 1 0.5 ! 36: CONST HCP_A3 : LU% MN : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1002/mgea.39](https://doi.org/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 (Lu–Mn) - Id: `phase:lu-mn:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1255.86–2500 K, x(Mn) 0–1 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-mn:liquid) Names (2): _corpus: _corpus:phase:lu-mn:liquid _tdb: _tdb:LuMn-24Ye.tdb:LIQUID ### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): LIQUID, type code %, sha256 `68fc5f07bf36f926…` ~~~~text 20: PHASE LIQUID:L % 1 1 ! 21: CONST LIQUID:L : LU MN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1002/mgea.39](https://doi.org/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_ ## LU6MN23_D8A (Lu–Mn) - Id: `phase:lu-mn:lu6mn23-d8a`; status `assigned` - Structure: Mn23Th6 · D8_a · cF116 · Fm-3m (225); type `st:d8-a-mn23th6-cf116`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaacpxbk and oqmd-1280575, space group 225 - Stoichiometry: Lu 0.2069, Mn 0.7931 - Stability: stable in 1 of 1 calculated diagram(s): 300–1455.52 K, x(Mn) 0.7931–0.7931 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-mn:lu6mn23-d8a) Names (4): _corpus: _corpus:phase:lu-mn:lu6mn23-d8a _mp: _mp:mp-aaacpxbk _oqmd: _oqmd:oqmd-1280575 _tdb: _tdb:LuMn-24Ye.tdb:LU6MN23_D8A ### TDB models of LU6MN23_D8A (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): LU6MN23_D8A, type code %A, sha256 `68fc5f07bf36f926…` ~~~~text 55: PHASE LU6MN23_D8A %A 2 6 23 ! 56: CONST LU6MN23_D8A : LU : MN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1002/mgea.39](https://doi.org/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_ ## LUMN2_C14 (Lu–Mn) - Id: `phase:lu-mn:lumn2-c14`; status `assigned` - Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type `st:c14-mgzn2-hp12`; tier A: standard phase name; confidence high - Stoichiometry: Lu 0.3333, Mn 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 300–1460.26 K, x(Mn) 0.66667–0.66667 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-mn:lumn2-c14) Names (2): _corpus: _corpus:phase:lu-mn:lumn2-c14 _tdb: _tdb:LuMn-24Ye.tdb:LUMN2_C14 ### TDB models of LUMN2_C14 (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): LUMN2_C14, type code %, sha256 `68fc5f07bf36f926…` ~~~~text 50: PHASE LUMN2_C14 % 2 1 2 ! 51: CONST LUMN2_C14 : LU : MN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1002/mgea.39](https://doi.org/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_ ## LUMN5 (Lu–Mn) - Id: `phase:lu-mn:lumn5`; status `assigned` - Structure: LuMn5 · hP12 · P6_3mc (186); type `st:lumn5-hp12`; 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](https://doi.org/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: Lu 0.1667, Mn 0.8333 - Stability: stable in 1 of 1 calculated diagram(s): 300–1405.9 K, x(Mn) 0.83333–0.83333 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-mn:lumn5) Names (2): _corpus: _corpus:phase:lu-mn:lumn5 _tdb: _tdb:LuMn-24Ye.tdb:LUMN5 ### TDB models of LUMN5 (1): PHASE and CONSTITUENT statements as written [LuMn-24Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/LuMn-24Ye.tdb): LUMN5, type code %, sha256 `68fc5f07bf36f926…` ~~~~text 60: PHASE LUMN5 % 2 1 5 ! 61: CONST LUMN5 : LU : MN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1002/mgea.39](https://doi.org/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). https://doi.org/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). https://doi.org/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. ```bibtex @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} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).