Cu–Tm phases

9 phases (tier A 5, tier C 1, liquid 1, needs_review 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 · Cu–Tm system page · Markdown · field reference

Phases of the Cu–Tm system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:cu-tm:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
CU2TM phase:cu-tm:cu2tm	Hg2K · oI12 · Imma (74)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1233.33 K, x(Tm) 0.33333–0.33333	6	1
CU5TM_C15B phase:cu-tm:cu5tm-c15b	AuBe5 · C15_b · cF24 · F-43m (216)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1273.03 K, x(Tm) 0.16667–0.16667	5	1
CU7TM2 phase:cu-tm:cu7tm2		needs_review	stable in 1 of 1 calculated diagram(s): 1193.11–1232.63 K, x(Tm) 0.22222–0.22222	4	1
CU9TM2 phase:cu-tm:cu9tm2		needs_review	stable in 1 of 1 calculated diagram(s): 300–1293.03 K, x(Tm) 0.18182–0.18182	10	1
CUTM_B2 phase:cu-tm:cutm-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1374.88 K, x(Tm) 0.5–0.5	6	1
FCC_A1 phase:cu-tm:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1369.6 K, x(Tm) 0–1e-05	3	1
HCP_A3 phase:cu-tm:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2499.39 K, x(Tm) 0.99812–1	2	1
LIQUID phase:cu-tm:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1178.12–2500 K, x(Tm) 0–1	21	1

BCC_A2 (Cu–Tm)

Id: phase:cu-tm:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cu-tm:bcc-a2
tdb: tdb:CuTm-09Wan.tdb:BCC_A2

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

CuTm-09Wan.tdb: BCC_A2, type code %B, sha256 b25db1e4f57b8e8f…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : CU TM : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase

CU2TM (Cu–Tm)

Id: phase:cu-tm:cu2tm; status assigned
Structure: Hg2K · oI12 · Imma (74); type st:hg2k-oi12; 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 (dft_space_group_74_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Cu 0.6667, Tm 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1233.33 K, x(Tm) 0.33333–0.33333
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-tm:cu2tm
paper: paper:10.1016/j.jallcom.2009.03.101:Cu2Tm
tdb: tdb:CuTm-09Wan.tdb:CU2TM

TDB models of CU2TM (1): PHASE and CONSTITUENT statements as written

CuTm-09Wan.tdb: CU2TM, type code %, sha256 b25db1e4f57b8e8f…

56: PHASE CU2TM % 2 2 1 !
57: CONST CU2TM : CU : TM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports values for this phase

CU5TM_C15B (Cu–Tm)

Id: phase:cu-tm:cu5tm-c15b; status assigned
Structure: AuBe5 · C15_b · cF24 · F-43m (216); type st:c15-b-aube5-cf24; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaabtgy and oqmd-17174, space group 216
Stoichiometry: Cu 0.8333, Tm 0.1667
Stability: stable in 1 of 1 calculated diagram(s): 300–1273.03 K, x(Tm) 0.16667–0.16667
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cu-tm:cu5tm-c15b
mp: mp:mp-aaaabtgy
oqmd: oqmd:oqmd-17174
paper: paper:10.1016/j.jallcom.2009.03.101:Cu5Tm
tdb: tdb:CuTm-09Wan.tdb:CU5TM_C15B

TDB models of CU5TM_C15B (1): PHASE and CONSTITUENT statements as written

CuTm-09Wan.tdb: CU5TM_C15B, type code %, sha256 b25db1e4f57b8e8f…

41: PHASE CU5TM_C15B % 2 5 1 !
42: CONST CU5TM_C15B : CU : TM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports values for this phase

CU7TM2 (Cu–Tm)

Id: phase:cu-tm:cu7tm2; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Cu7Tm2) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Cu7Tm2) — Hallstedt 2025 mmc2 row for CU7TM2: Cu7Tm2
Stoichiometry: Cu 0.7778, Tm 0.2222
Stability: stable in 1 of 1 calculated diagram(s): 1193.11–1232.63 K, x(Tm) 0.22222–0.22222
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-tm:cu7tm2
paper: paper:10.1016/j.jallcom.2009.03.101:Cu7Tm2
tdb: tdb:CuTm-09Wan.tdb:CU7TM2

TDB models of CU7TM2 (1): PHASE and CONSTITUENT statements as written

CuTm-09Wan.tdb: CU7TM2, type code %, sha256 b25db1e4f57b8e8f…

51: PHASE CU7TM2 % 2 7 2 !
52: CONST CU7TM2 : CU : TM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports values for this phase

CU9TM2 (Cu–Tm)

Id: phase:cu-tm:cu9tm2; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Cu9Tm2) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Cu9Tm2) — Hallstedt 2025 mmc2 row for CU9TM2: Cu9Tm2
Stoichiometry: Cu 0.8182, Tm 0.1818
Stability: stable in 1 of 1 calculated diagram(s): 300–1293.03 K, x(Tm) 0.18182–0.18182
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-tm:cu9tm2
paper: paper:10.1016/j.jallcom.2009.03.101:Cu9Tm2
tdb: tdb:CuTm-09Wan.tdb:CU9TM2

TDB models of CU9TM2 (1): PHASE and CONSTITUENT statements as written

CuTm-09Wan.tdb: CU9TM2, type code %, sha256 b25db1e4f57b8e8f…

46: PHASE CU9TM2 % 2 9 2 !
47: CONST CU9TM2 : CU : TM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports values for this phase

CUTM_B2 (Cu–Tm)

Id: phase:cu-tm:cutm-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaablx and oqmd-29826, space group 221
Stoichiometry: Cu 0.5000, Tm 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1374.88 K, x(Tm) 0.5–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cu-tm:cutm-b2
mp: mp:mp-aaaaablx
oqmd: oqmd:oqmd-29826
paper: paper:10.1016/j.jallcom.2009.03.101:CuTm
tdb: tdb:CuTm-09Wan.tdb:CUTM_B2

TDB models of CUTM_B2 (1): PHASE and CONSTITUENT statements as written

CuTm-09Wan.tdb: CUTM_B2, type code %, sha256 b25db1e4f57b8e8f…

61: PHASE CUTM_B2 % 2 1 1 !
62: CONST CUTM_B2 : CU : TM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports values for this phase

FCC_A1 (Cu–Tm)

Id: phase:cu-tm: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 1 of 1 calculated diagram(s): 300–1369.6 K, x(Tm) 0–1e-05
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-tm:fcc-a1
paper: paper:10.1016/j.jallcom.2009.03.101:(Cu)
tdb: tdb:CuTm-09Wan.tdb:FCC_A1

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

CuTm-09Wan.tdb: FCC_A1, type code %A, sha256 b25db1e4f57b8e8f…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : CU% TM : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports values for this phase

HCP_A3 (Cu–Tm)

Id: phase:cu-tm: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): 300–2499.39 K, x(Tm) 0.99812–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-tm:hcp-a3
paper: paper:10.1016/j.jallcom.2009.03.101:(Tm)
tdb: tdb:CuTm-09Wan.tdb:HCP_A3

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

CuTm-09Wan.tdb: HCP_A3, type code %A, sha256 b25db1e4f57b8e8f…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : CU TM% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports values for this phase

LIQUID (Cu–Tm)

Id: phase:cu-tm:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1178.12–2500 K, x(Tm) 0–1
Literature: 21 values (21 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-tm:liquid
paper: paper:10.1016/j.jallcom.2009.03.101:L
tdb: tdb:CuTm-09Wan.tdb:LIQUID

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

CuTm-09Wan.tdb: LIQUID, type code %, sha256 b25db1e4f57b8e8f…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : CU TM : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.03.101 C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009).
assessment that models this phase; reports 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}
}