Ga–Lu phases

10 phases (tier A 6, tier C 3, liquid 1); 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 · Ga–Lu system page · Markdown · field reference

Phases of the Ga–Lu system (10)
Phase	Structure	Basis	Stability (calculated)	TDB models
ORTHORHOMBIC_A11 phase:ga-lu:a11-orthorhombic	alpha-Ga · A11 · oC8 · Cmce (64)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–302.78 K, x(Lu) 0–0	2
BCC_A2 phase:ga-lu:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 2 calculated diagram(s)	2
FCC_A1 phase:ga-lu:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 2 calculated diagram(s)	2
GA2LU phase:ga-lu:ga2lu	Hg2K · oI12 · Imma (74)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1442.62 K, x(Lu) 0.33333–0.33333	2
GA3LU_L12 phase:ga-lu:ga3lu-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1204.29 K, x(Lu) 0.25–0.25	2
GA3LU5 phase:ga-lu:ga3lu5	Ga3Y5 · mC32 · C2/m (12)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1692.89 K, x(Lu) 0.57965–0.625	2
GA5LU3 phase:ga-lu:ga5lu3	Ga5Tm3 · oP32 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1554.19 K, x(Lu) 0.375–0.375	2
GALU_B33 phase:ga-lu:galu-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1622.55 K, x(Lu) 0.5–0.5	2
HCP_A3 phase:ga-lu:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2499.75 K, x(Lu) 0.99999–1	2
LIQUID phase:ga-lu:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 302.77–2500 K, x(Lu) 0–1	2

ORTHORHOMBIC_A11 (Ga–Lu)

Id: phase:ga-lu:a11-orthorhombic; status assigned
Structure: alpha-Ga · A11 · oC8 · Cmce (64); type st:a11-alpha-ga-oc8; tier A: standard phase name; confidence high
Stoichiometry: Ga 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–302.78 K, x(Lu) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:a11-orthorhombic
tdb: tdb:GaLu-22Ait-RK.tdb:ORTHORHOMBIC_A11, tdb:GaLu-22Ait-ass.tdb:ORTHORHOMBIC_A11

TDB models of ORTHORHOMBIC_A11 (2): PHASE and CONSTITUENT statements as written

GaLu-22Ait-RK.tdb: ORTHORHOMBIC_A11, type code %, sha256 ff5365cc1b75c918…

45: PHASE ORTHORHOMBIC_A11 % 1 1 !
46: CONST ORTHORHOMBIC_A11 : GA : !

GaLu-22Ait-ass.tdb: ORTHORHOMBIC_A11, type code %, sha256 acd5a01972394d22…

51: PHASE ORTHORHOMBIC_A11 % 1 1 !
52: CONST ORTHORHOMBIC_A11 : GA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

BCC_A2 (Ga–Lu)

Id: phase:ga-lu:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stoichiometry: Ga 1.0000
Stability: not stable in 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:bcc-a2
tdb: tdb:GaLu-22Ait-RK.tdb:BCC_A2, tdb:GaLu-22Ait-ass.tdb:BCC_A2

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

GaLu-22Ait-RK.tdb: BCC_A2, type code %B, sha256 ff5365cc1b75c918…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : GA : VA : !

GaLu-22Ait-ass.tdb: BCC_A2, type code %B, sha256 acd5a01972394d22…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : GA : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

FCC_A1 (Ga–Lu)

Id: phase:ga-lu:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Ga 1.0000
Stability: not stable in 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:fcc-a1
tdb: tdb:GaLu-22Ait-RK.tdb:FCC_A1, tdb:GaLu-22Ait-ass.tdb:FCC_A1

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

GaLu-22Ait-RK.tdb: FCC_A1, type code %A, sha256 ff5365cc1b75c918…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : GA : VA : !

GaLu-22Ait-ass.tdb: FCC_A1, type code %A, sha256 acd5a01972394d22…

36: PHASE FCC_A1 %A 2 1 1 !
37: CONST FCC_A1 : GA : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

GA2LU (Ga–Lu)

Id: phase:ga-lu:ga2lu; 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 (no_on_hull_entry_in_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ga 0.6667, Lu 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–1442.62 K, x(Lu) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:ga2lu
tdb: tdb:GaLu-22Ait-RK.tdb:GA2LU, tdb:GaLu-22Ait-ass.tdb:GA2LU

TDB models of GA2LU (2): PHASE and CONSTITUENT statements as written

GaLu-22Ait-RK.tdb: GA2LU, type code %, sha256 ff5365cc1b75c918…

55: PHASE GA2LU % 2 2 1 !
56: CONST GA2LU : GA : LU : !

GaLu-22Ait-ass.tdb: GA2LU, type code %, sha256 acd5a01972394d22…

61: PHASE GA2LU % 2 2 1 !
62: CONST GA2LU : GA : LU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

GA3LU_L12 (Ga–Lu)

Id: phase:ga-lu:ga3lu-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaaatb and oqmd-18364, space group 221
Stoichiometry: Ga 0.7500, Lu 0.2500
Stability: stable in 2 of 2 calculated diagram(s): 300–1204.29 K, x(Lu) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ga-lu:ga3lu-l12
mp: mp:mp-aaaaaatb
oqmd: oqmd:oqmd-18364
tdb: tdb:GaLu-22Ait-RK.tdb:GA3LU_L12, tdb:GaLu-22Ait-ass.tdb:GA3LU_L12

TDB models of GA3LU_L12 (2): PHASE and CONSTITUENT statements as written

GaLu-22Ait-RK.tdb: GA3LU_L12, type code %, sha256 ff5365cc1b75c918…

50: PHASE GA3LU_L12 % 2 3 1 !
51: CONST GA3LU_L12 : GA : LU : !

GaLu-22Ait-ass.tdb: GA3LU_L12, type code %, sha256 acd5a01972394d22…

56: PHASE GA3LU_L12 % 2 3 1 !
57: CONST GA3LU_L12 : GA : LU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

GA3LU5 (Ga–Lu)

Id: phase:ga-lu:ga3lu5; status assigned
Structure: Ga3Y5 · mC32 · C2/m (12); type st:ga3y5-mc32; 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_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 2 of 2 calculated diagram(s): 300–1692.89 K, x(Lu) 0.57965–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:ga3lu5
tdb: tdb:GaLu-22Ait-RK.tdb:GA3LU5, tdb:GaLu-22Ait-ass.tdb:GA3LU5

TDB models of GA3LU5 (2): PHASE and CONSTITUENT statements as written

GaLu-22Ait-RK.tdb: GA3LU5, type code %, sha256 ff5365cc1b75c918…

70: PHASE GA3LU5 % 2 3 5 !
71: CONST GA3LU5 : GA : GA LU% : !

GaLu-22Ait-ass.tdb: GA3LU5, type code %, sha256 acd5a01972394d22…

76: PHASE GA3LU5 % 2 3 5 !
77: CONST GA3LU5 : GA : GA LU% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

GA5LU3 (Ga–Lu)

Id: phase:ga-lu:ga5lu3; status assigned
Structure: Ga5Tm3 · oP32 · Pnma (62); type st:ga5tm3-op32; 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_62_matches_3_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ga 0.6250, Lu 0.3750
Stability: stable in 2 of 2 calculated diagram(s): 300–1554.19 K, x(Lu) 0.375–0.375
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:ga5lu3
tdb: tdb:GaLu-22Ait-RK.tdb:GA5LU3, tdb:GaLu-22Ait-ass.tdb:GA5LU3

TDB models of GA5LU3 (2): PHASE and CONSTITUENT statements as written

GaLu-22Ait-RK.tdb: GA5LU3, type code %, sha256 ff5365cc1b75c918…

60: PHASE GA5LU3 % 2 5 3 !
61: CONST GA5LU3 : GA : LU : !

GaLu-22Ait-ass.tdb: GA5LU3, type code %, sha256 acd5a01972394d22…

66: PHASE GA5LU3 % 2 5 3 !
67: CONST GA5LU3 : GA : LU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

GALU_B33 (Ga–Lu)

Id: phase:ga-lu:galu-b33; status assigned
Structure: CrB · B33 · oC8 · Cmcm (63); type st:b33-crb-oc8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacezrp and oqmd-30295, space group 63
Stoichiometry: Ga 0.5000, Lu 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 300–1622.55 K, x(Lu) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ga-lu:galu-b33
mp: mp:mp-aaacezrp
oqmd: oqmd:oqmd-30295
tdb: tdb:GaLu-22Ait-RK.tdb:GALU_B33, tdb:GaLu-22Ait-ass.tdb:GALU_B33

TDB models of GALU_B33 (2): PHASE and CONSTITUENT statements as written

GaLu-22Ait-RK.tdb: GALU_B33, type code %, sha256 ff5365cc1b75c918…

65: PHASE GALU_B33 % 2 1 1 !
66: CONST GALU_B33 : GA : LU : !

GaLu-22Ait-ass.tdb: GALU_B33, type code %, sha256 acd5a01972394d22…

71: PHASE GALU_B33 % 2 1 1 !
72: CONST GALU_B33 : GA : LU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

HCP_A3 (Ga–Lu)

Id: phase:ga-lu: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): 300–2499.75 K, x(Lu) 0.99999–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:hcp-a3
tdb: tdb:GaLu-22Ait-RK.tdb:HCP_A3, tdb:GaLu-22Ait-ass.tdb:HCP_A3

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

GaLu-22Ait-RK.tdb: HCP_A3, type code %, sha256 ff5365cc1b75c918…

40: PHASE HCP_A3 % 2 1 0.5 !
41: CONST HCP_A3 : GA LU% : VA : !

GaLu-22Ait-ass.tdb: HCP_A3, type code %, sha256 acd5a01972394d22…

46: PHASE HCP_A3 % 2 1 0.5 !
47: CONST HCP_A3 : GA LU% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
assessment that models this phase

LIQUID (Ga–Lu)

Id: phase:ga-lu:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 302.77–2500 K, x(Lu) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-lu:liquid
tdb: tdb:GaLu-22Ait-RK.tdb:LIQUID, tdb:GaLu-22Ait-ass.tdb:LIQUID

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

GaLu-22Ait-RK.tdb: LIQUID, type code %, sha256 ff5365cc1b75c918…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : GA LU : !

GaLu-22Ait-ass.tdb: LIQUID, type code %, sha256 acd5a01972394d22…

31: PHASE LIQUID:L % 1 1 !
32: CONST LIQUID:L : GA GALU LU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2022.102464 M. Ait Boukideur, N. Selhaoui, F.Z. Chrifti Alaoui, D.O. Poletaev, H. Bouchta, K. Achgar, A. Aharoune, Calphad, 79, 102464(2022).
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}
}