Au–La phases

11 phases (tier A 7, tier C 2, liquid 1, needs_review 1); 10 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 · Au–La system page · Markdown · field reference

Phases of the Au–La system (11)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AU2LA phase:au-la:au2la	Hg2K · oI12 · Imma (74)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1489.65 K, x(La) 0.33333–0.33333	12	1
AU51LA14 phase:au-la:au51la14	Ag51Gd14 · hP68 · P6/m (175)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1476.72 K, x(La) 0.21538–0.21538	8	1
AU6LA phase:au-la:au6la		needs_review	stable in 1 of 1 calculated diagram(s): 300–1174.59 K, x(La) 0.14286–0.14286	2	1
AULA_B27 phase:au-la:aula-b27	FeB · B27 · oP8 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–932.92 K, x(La) 0.5–0.5	2	1
AULA_B33 phase:au-la:aula-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 932.92–1595.94 K, x(La) 0.5–0.5	8	1
AULA2_C37 phase:au-la:aula2-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–941.33 K, x(La) 0.66667–0.66667	4	1
BCC_A2 phase:au-la:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1134–2499 K, x(La) 1–1	0	1
DHCP phase:au-la:dhcp-a3	alpha-La · A3' · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–550 K, x(La) 1–1	0	1
FCC_A1 phase:au-la:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1544.78 K, x(La) 0–1	3	1
HCP_A3 phase:au-la:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
LIQUID phase:au-la:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 826.73–2500 K, x(La) 0–1	16	1

AU2LA (Au–La)

Id: phase:au-la:au2la; 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: Au 0.6667, La 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1489.65 K, x(La) 0.33333–0.33333
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-la:au2la
paper: paper:10.1016/j.jallcom.2011.01.072:Au2La
tdb: tdb:AuLa-11Don.tdb:AU2LA

TDB models of AU2LA (1): PHASE and CONSTITUENT statements as written

AuLa-11Don.tdb: AU2LA, type code %, sha256 7e2c02c7ae6c5d0b…

56: PHASE AU2LA % 2 2 1 !
57: CONST AU2LA : AU : LA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(71)90125-1 O.D McMasters, K.A Gschneidner, G Bruzzone, A Palenzona, Stoichiometry, crystal structures and some melting points of the lanthanide-gold alloys, Journal of the Less Common Metals 25, 135-160 (1971).
cited as the source of values for this phase

AU51LA14 (Au–La)

Id: phase:au-la:au51la14; status assigned
Structure: Ag51Gd14 · hP68 · P6/m (175); type st:ag51gd14-hp68; 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: Au 0.7846, La 0.2154
Stability: stable in 1 of 1 calculated diagram(s): 300–1476.72 K, x(La) 0.21538–0.21538
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-la:au51la14
paper: paper:10.1016/j.jallcom.2011.01.072:Au51La14
tdb: tdb:AuLa-11Don.tdb:AU51LA14

TDB models of AU51LA14 (1): PHASE and CONSTITUENT statements as written

AuLa-11Don.tdb: AU51LA14, type code %, sha256 7e2c02c7ae6c5d0b…

51: PHASE AU51LA14 % 2 51 14 !
52: CONST AU51LA14 : AU : LA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(71)90125-1 O.D McMasters, K.A Gschneidner, G Bruzzone, A Palenzona, Stoichiometry, crystal structures and some melting points of the lanthanide-gold alloys, Journal of the Less Common Metals 25, 135-160 (1971).
cited as the source of values for this phase

AU6LA (Au–La)

Id: phase:au-la:au6la; status needs_review
No structure assigned. Why: no_on_hull_entry_in_mp; no_structure_token; sgte_mmc2_row_incomplete
Candidate (dft_oqmd): C2/c (15) — on-hull OQMD Au6 La1 at x(LA)=0.1429
Candidate (literature_printed): (Au6La) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Au6La) — Hallstedt 2025 mmc2 row for AU6LA: Au6La
Stoichiometry: Au 0.8571, La 0.1429
Stability: stable in 1 of 1 calculated diagram(s): 300–1174.59 K, x(La) 0.14286–0.14286
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-la:au6la
paper: paper:10.1016/j.jallcom.2011.01.072:Au6La
tdb: tdb:AuLa-11Don.tdb:AU6LA

TDB models of AU6LA (1): PHASE and CONSTITUENT statements as written

AuLa-11Don.tdb: AU6LA, type code %, sha256 7e2c02c7ae6c5d0b…

46: PHASE AU6LA % 2 6 1 !
47: CONST AU6LA : AU : LA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase; reports values for this phase

AULA_B27 (Au–La)

Id: phase:au-la:aula-b27; status assigned
Structure: FeB · B27 · oP8 · Pnma (62); type st:b27-feb-op8; tier A: standard phase name; confidence high
Stoichiometry: Au 0.5000, La 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–932.92 K, x(La) 0.5–0.5
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-la:aula-b27
paper: paper:10.1016/j.jallcom.2011.01.072:αAuLa
tdb: tdb:AuLa-11Don.tdb:AULA_B27

TDB models of AULA_B27 (1): PHASE and CONSTITUENT statements as written

AuLa-11Don.tdb: AULA_B27, type code %, sha256 7e2c02c7ae6c5d0b…

61: PHASE AULA_B27 % 2 1 1 !
62: CONST AULA_B27 : AU : LA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase; reports values for this phase

AULA_B33 (Au–La)

Id: phase:au-la:aula-b33; status assigned
Structure: CrB · B33 · oC8 · Cmcm (63); type st:b33-crb-oc8; tier A: standard phase name; confidence high
Stoichiometry: Au 0.5000, La 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 932.92–1595.94 K, x(La) 0.5–0.5
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-la:aula-b33
paper: paper:10.1016/j.jallcom.2011.01.072:βAuLa
tdb: tdb:AuLa-11Don.tdb:AULA_B33

TDB models of AULA_B33 (1): PHASE and CONSTITUENT statements as written

AuLa-11Don.tdb: AULA_B33, type code %, sha256 7e2c02c7ae6c5d0b…

66: PHASE AULA_B33 % 2 1 1 !
67: CONST AULA_B33 : AU : LA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase; reports values for this phase

AULA2_C37 (Au–La)

Id: phase:au-la:aula2-c37; status assigned
Structure: Co2Si · C37 · oP12 · Pnma (62); type st:c37-co2si-op12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaackugh and oqmd-1520675, space group 62
Stoichiometry: Au 0.3333, La 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–941.33 K, x(La) 0.66667–0.66667
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:au-la:aula2-c37
mp: mp:mp-aaackugh
oqmd: oqmd:oqmd-1520675
paper: paper:10.1016/j.jallcom.2011.01.072:AuLa2
tdb: tdb:AuLa-11Don.tdb:AULA2_C37

TDB models of AULA2_C37 (1): PHASE and CONSTITUENT statements as written

AuLa-11Don.tdb: AULA2_C37, type code %, sha256 7e2c02c7ae6c5d0b…

71: PHASE AULA2_C37 % 2 1 2 !
72: CONST AULA2_C37 : AU : LA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase; reports values for this phase

BCC_A2 (Au–La)

Id: phase:au-la: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): 1134–2499 K, x(La) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:au-la:bcc-a2
tdb: tdb:AuLa-11Don.tdb:BCC_A2

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

AuLa-11Don.tdb: BCC_A2, type code %B, sha256 7e2c02c7ae6c5d0b…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : AU LA% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase

DHCP (Au–La)

Id: phase:au-la:dhcp-a3; status assigned
Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type st:a3-alpha-la-hp4; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–550 K, x(La) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:au-la:dhcp-a3
tdb: tdb:AuLa-11Don.tdb:DHCP

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

AuLa-11Don.tdb: DHCP, type code %, sha256 7e2c02c7ae6c5d0b…

41: PHASE DHCP % 1 1 !
42: CONST DHCP : AU LA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase

FCC_A1 (Au–La)

Id: phase:au-la: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): 300–1544.78 K, x(La) 0–1
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:au-la:fcc-a1
paper: paper:10.1016/j.jallcom.2011.01.072:Au(fcc), paper:10.1016/j.jallcom.2011.01.072:La(fcc)
tdb: tdb:AuLa-11Don.tdb:FCC_A1

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

AuLa-11Don.tdb: FCC_A1, type code %A, sha256 7e2c02c7ae6c5d0b…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : AU% LA : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase; reports values for this phase

HCP_A3 (Au–La)

Id: phase:au-la:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stoichiometry: Au 1.0000
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:au-la:hcp-a3
tdb: tdb:AuLa-11Don.tdb:HCP_A3

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

AuLa-11Don.tdb: HCP_A3, type code %A, sha256 7e2c02c7ae6c5d0b…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
assessment that models this phase

LIQUID (Au–La)

Id: phase:au-la:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 826.73–2500 K, x(La) 0–1
Literature: 16 values (16 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-la:liquid
paper: paper:10.1016/j.jallcom.2011.01.072:L
tdb: tdb:AuLa-11Don.tdb:LIQUID

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

AuLa-11Don.tdb: LIQUID, type code %, sha256 7e2c02c7ae6c5d0b…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : AU LA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2011.01.072 H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011).
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}
}