Au–Lu phases

9 phases (tier A 8, 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 · Au–Lu system page · Markdown · field reference

Phases of the Au–Lu system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AU2LU_C11B phase:au-lu:au2lu-c11b	MoSi2 · C11_b · tI6 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1400.31 K, x(Lu) 0.33333–0.33333	6	1
AU3LU_D0A phase:au-lu:au3lu-d0a	beta-Cu3Ti · D0_a · oP8 · Pmmn (59)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 498.36–1350.51 K, x(Lu) 0.25–0.25	8	1
AU4LU_D1A phase:au-lu:au4lu-d1a	MoNi4 · D1_a · tI10 · I4/m (87)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1302.66 K, x(Lu) 0.2–0.2	9	1
AULU_B2 phase:au-lu:aulu-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2053.18 K, x(Lu) 0.5–0.5	7	1
AULU2_C37 phase:au-lu:aulu2-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1603.83 K, x(Lu) 0.66667–0.66667	4	1
BCC_A2 phase:au-lu:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
FCC_A1 phase:au-lu:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1338.18 K, x(Lu) 0–0.07866	3	1
HCP_A3 phase:au-lu:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2499.75 K, x(Lu) 1–1	2	1
LIQUID phase:au-lu:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1162.09–2500 K, x(Lu) 0–1	20	1

AU2LU_C11B (Au–Lu)

Id: phase:au-lu:au2lu-c11b; status assigned
Structure: MoSi2 · C11_b · tI6 · I4/mmm (139); type st:c11-b-mosi2-ti6; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacfyds and oqmd-28185, space group 139
Stoichiometry: Au 0.6667, Lu 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1400.31 K, x(Lu) 0.33333–0.33333
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:au-lu:au2lu-c11b
mp: mp:mp-aaacfyds
oqmd: oqmd:oqmd-28185
paper: paper:10.1007/s11669-016-0460-4:Au2Lu
tdb: tdb:AuLu-16Wan.tdb:AU2LU_C11B

TDB models of AU2LU_C11B (1): PHASE and CONSTITUENT statements as written

AuLu-16Wan.tdb: AU2LU_C11B, type code %, sha256 a48c8c77ccf4a882…

51: PHASE AU2LU_C11B % 2 2 1 !
52: CONST AU2LU_C11B : AU : LU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase; reports values for this phase

AU3LU_D0A (Au–Lu)

Id: phase:au-lu:au3lu-d0a; status assigned
Structure: beta-Cu3Ti · D0_a · oP8 · Pmmn (59); type st:d0-a-beta-cu3ti-op8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacgjbi and oqmd-28184, space group 59
Stoichiometry: Au 0.7500, Lu 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 498.36–1350.51 K, x(Lu) 0.25–0.25
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:au-lu:au3lu-d0a
mp: mp:mp-aaacgjbi
oqmd: oqmd:oqmd-28184
paper: paper:10.1007/s11669-016-0460-4:Au3Lu
tdb: tdb:AuLu-16Wan.tdb:AU3LU_D0A

TDB models of AU3LU_D0A (1): PHASE and CONSTITUENT statements as written

AuLu-16Wan.tdb: AU3LU_D0A, type code %, sha256 a48c8c77ccf4a882…

46: PHASE AU3LU_D0A % 2 3 1 !
47: CONST AU3LU_D0A : AU : LU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase; reports values for this phase

AU4LU_D1A (Au–Lu)

Id: phase:au-lu:au4lu-d1a; status assigned
Structure: MoNi4 · D1_a · tI10 · I4/m (87); type st:d1-a-moni4-ti10; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacivar and oqmd-28186, space group 87
Stoichiometry: Au 0.8000, Lu 0.2000
Stability: stable in 1 of 1 calculated diagram(s): 300–1302.66 K, x(Lu) 0.2–0.2
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:au-lu:au4lu-d1a
mp: mp:mp-aaacivar
oqmd: oqmd:oqmd-28186
paper: paper:10.1007/s11669-016-0460-4:Au4Lu
tdb: tdb:AuLu-16Wan.tdb:AU4LU_D1A

TDB models of AU4LU_D1A (1): PHASE and CONSTITUENT statements as written

AuLu-16Wan.tdb: AU4LU_D1A, type code %, sha256 a48c8c77ccf4a882…

41: PHASE AU4LU_D1A % 2 4 1 !
42: CONST AU4LU_D1A : AU : LU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase; reports values for this phase

AULU_B2 (Au–Lu)

Id: phase:au-lu:aulu-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-aaaaaqqr and oqmd-10775, space group 221
Stoichiometry: Au 0.5000, Lu 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–2053.18 K, x(Lu) 0.5–0.5
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:au-lu:aulu-b2
mp: mp:mp-aaaaaqqr
oqmd: oqmd:oqmd-10775
paper: paper:10.1007/s11669-016-0460-4:AuLu
tdb: tdb:AuLu-16Wan.tdb:AULU_B2

TDB models of AULU_B2 (1): PHASE and CONSTITUENT statements as written

AuLu-16Wan.tdb: AULU_B2, type code %, sha256 a48c8c77ccf4a882…

56: PHASE AULU_B2 % 2 1 1 !
57: CONST AULU_B2 : AU : LU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase; reports values for this phase

AULU2_C37 (Au–Lu)

Id: phase:au-lu:aulu2-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-aaackrxo and oqmd-1800554, space group 62
Stoichiometry: Au 0.3333, Lu 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1603.83 K, x(Lu) 0.66667–0.66667
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:au-lu:aulu2-c37
mp: mp:mp-aaackrxo
oqmd: oqmd:oqmd-1800554
paper: paper:10.1007/s11669-016-0460-4:AuLu2
tdb: tdb:AuLu-16Wan.tdb:AULU2_C37

TDB models of AULU2_C37 (1): PHASE and CONSTITUENT statements as written

AuLu-16Wan.tdb: AULU2_C37, type code %, sha256 a48c8c77ccf4a882…

61: PHASE AULU2_C37 % 2 1 2 !
62: CONST AULU2_C37 : AU : LU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase; reports values for this phase

BCC_A2 (Au–Lu)

Id: phase:au-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: 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-lu:bcc-a2
tdb: tdb:AuLu-16Wan.tdb:BCC_A2

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

AuLu-16Wan.tdb: BCC_A2, type code %B, sha256 a48c8c77ccf4a882…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase

FCC_A1 (Au–Lu)

Id: phase:au-lu: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): 300–1338.18 K, x(Lu) 0–0.07866
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-lu:fcc-a1
paper: paper:10.1007/s11669-016-0460-4:(Au)
tdb: tdb:AuLu-16Wan.tdb:FCC_A1

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

AuLu-16Wan.tdb: FCC_A1, type code %A, sha256 a48c8c77ccf4a882…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase; reports values for this phase

HCP_A3 (Au–Lu)

Id: phase:au-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 1 of 1 calculated diagram(s): 300–2499.75 K, x(Lu) 1–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-lu:hcp-a3
paper: paper:10.1007/s11669-016-0460-4:(Lu)
tdb: tdb:AuLu-16Wan.tdb:HCP_A3

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

AuLu-16Wan.tdb: HCP_A3, type code %A, sha256 a48c8c77ccf4a882…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
assessment that models this phase; reports values for this phase

LIQUID (Au–Lu)

Id: phase:au-lu:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1162.09–2500 K, x(Lu) 0–1
Literature: 20 values (20 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-lu:liquid
paper: paper:10.1007/s11669-016-0460-4:L
tdb: tdb:AuLu-16Wan.tdb:LIQUID

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

AuLu-16Wan.tdb: LIQUID, type code %, sha256 a48c8c77ccf4a882…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11669-016-0460-4 S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).
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}
}