Al–Au phases

15 phases (tier A 6, tier B 1, tier C 5, liquid 1, needs_review 2); 14 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 · Al–Au system page · Markdown · field reference

Phases of the Al–Au system (15)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AL2AU_C1 phase:al-au:al2au-c1	CaF2 · C1 · cF12 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1341.54 K, x(Au) 0.32908–0.33807	28	3
AL2AU5 phase:al-au:al2au5	In3Yb8 · hR44 · R-3c (167)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–860.82 K, x(Au) 0.71429–0.71429	11	1
AL3AU8 phase:al-au:al3au8	In3Yb8 · hR44 · R-3c (167)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–847.95 K, x(Au) 0.72727–0.72727	11	2
ALAU phase:al-au:alau	AlAu · mP8 · P2_1/m (11)	tier B: DFT-supported (unique MP + OQMD match)	stable in 3 of 3 calculated diagram(s): 300–896.6 K, x(Au) 0.5–0.5	21	3
ALAU2 phase:al-au:alau2		needs_review	stable in 2 of 2 calculated diagram(s): 300–895.83 K, x(Au) 0.66667–0.66667	24	2
ALAU2_ALPHA phase:al-au:alau2-alpha	AlAu2 · oP12 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–835.5 K, x(Au) 0.66578–0.66665	6	1
ALAU2_BETA phase:al-au:alau2-beta	AlAu2 · oP30 · Pnnm (58)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–833.5 K, x(Au) 0.65974–0.66541	6	1
ALAU2_C11B phase:al-au:alau2-c11b	MoSi2 · C11_b · tI6 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 819.53–896.27 K, x(Au) 0.65553–0.66904	15	1
ALAU4 phase:al-au:alau4		needs_review	stable in 2 of 2 calculated diagram(s): 300–825.26 K, x(Au) 0.8–0.8	6	2
ALAU4_A2 phase:al-au:alau4-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 772.56–818 K, x(Au) 0.80244–0.80658	11	1
ALAU4_ALPHA phase:al-au:alau4-alpha	AlAu4 · cP20 · P2_13 (198)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–783.58 K, x(Au) 0.8–0.8	6	1
BCC_A2 phase:al-au:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 3 calculated diagram(s): 759.39–815.16 K, x(Au) 0.81402–0.83278	0	3
FCC_A1 phase:al-au:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2499.83 K, x(Au) 0–1	12	3
HCP_A3 phase:al-au:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
LIQUID phase:al-au:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 807.14–2500 K, x(Au) 0–1	37	3

AL2AU_C1 (Al–Au)

Id: phase:al-au:al2au-c1; status assigned
Structure: CaF2 · C1 · cF12 · Fm-3m (225); type st:c1-caf2-cf12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in AlAu-04Li.tdb also describes the disordered state
Stability: stable in 3 of 3 calculated diagram(s): 300–1341.54 K, x(Au) 0.32908–0.33807
Literature: 28 values (28 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:al-au:al2au-c1
paper: paper:10.1007/bf02868887:Al2Au, paper:10.1016/j.jallcom.2004.05.007:(Al2Au)
tdb: tdb:AlAu-04Li.tdb:AL2AU_C1, tdb:AlAu-04Liu.tdb:AL2AU_C1, tdb:AlAu-87Mur-LB.tdb:AL2AU_C1

TDB models of AL2AU_C1 (3): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: AL2AU_C1, type code %, sha256 14d6262f7039c9ec…

45: PHASE AL2AU_C1 % 2 2 1 !
46: CONST AL2AU_C1 : AL% AU : AL AU% : !

AlAu-04Liu.tdb: AL2AU_C1, type code %, sha256 d847563ac9e3bbad…

40: PHASE AL2AU_C1 % 2 2 1 !
41: CONST AL2AU_C1 : AL : AU : !

AlAu-87Mur-LB.tdb: AL2AU_C1, type code %, sha256 0ec479200ccaf6a5…

56: PHASE AL2AU_C1 % 2 2 1 !
57: CONST AL2AU_C1 : AL : AU : !

Example references (5 of 5; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase
doi:10.1016/0025-5416(70)90083-2 Bruno Predel, Udo Schallner, Thermodynamische untersuchung der systeme aluminium-antimon und aluminium-gold, Materials Science and Engineering 5, 210-219 (1970).
cited as the source of values for this phase

AL2AU5 (Al–Au)

Id: phase:al-au:al2au5; status assigned
Structure: In3Yb8 · hR44 · R-3c (167); type st:in3yb8-hr44; 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_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Al 0.2857, Au 0.7143
Stability: stable in 1 of 1 calculated diagram(s): 300–860.82 K, x(Au) 0.71429–0.71429
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-au:al2au5
paper: paper:10.1007/bf02868887:Al2Au5, paper:10.1007/bf02868887:AlAu5, paper:10.1007/bf02868887:β
tdb: tdb:AlAu-87Mur-LB.tdb:AL2AU5

TDB models of AL2AU5 (1): PHASE and CONSTITUENT statements as written

AlAu-87Mur-LB.tdb: AL2AU5, type code %, sha256 0ec479200ccaf6a5…

73: PHASE AL2AU5 % 2 2 5 !
74: CONST AL2AU5 : AL : AU : !

Example references (1 of 1; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase; reports values for this phase

AL3AU8 (Al–Au)

Id: phase:al-au:al3au8; status assigned
Structure: In3Yb8 · hR44 · R-3c (167); type st:in3yb8-hr44; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Al 0.2727, Au 0.7273
Stability: stable in 2 of 2 calculated diagram(s): 300–847.95 K, x(Au) 0.72727–0.72727
Literature: 11 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:al-au:al3au8
paper: paper:10.1016/j.jallcom.2004.05.007:Al3Au8
tdb: tdb:AlAu-04Li.tdb:AL3AU8, tdb:AlAu-04Liu.tdb:AL3AU8

TDB models of AL3AU8 (2): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: AL3AU8, type code %, sha256 14d6262f7039c9ec…

70: PHASE AL3AU8 % 2 3 8 !
71: CONST AL3AU8 : AL : AU : !

AlAu-04Liu.tdb: AL3AU8, type code %, sha256 d847563ac9e3bbad…

57: PHASE AL3AU8 % 2 3 8 !
58: CONST AL3AU8 : AL : AU : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase
doi:10.1007/bf02868887 J. L. Murray, H. Okamoto, T. B. Massalski, The Al−Au (Aluminum-gold) system, Bulletin of Alloy Phase Diagrams 8, 20-30 (1987).
cited as the source of values for this phase

ALAU (Al–Au)

Id: phase:al-au:alau; status assigned
Structure: AlAu · mP8 · P2_1/m (11); type st:alau-mp8; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Al 0.5000, Au 0.5000
Stability: stable in 3 of 3 calculated diagram(s): 300–896.6 K, x(Au) 0.5–0.5
Literature: 21 values (20 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:al-au:alau
mp: mp:mp-aaaaacbv
oqmd: oqmd:oqmd-17555
paper: paper:10.1007/bf02868887:AlAu, paper:10.1016/j.jallcom.2004.05.007:AlAu
tdb: tdb:AlAu-04Li.tdb:ALAU, tdb:AlAu-04Liu.tdb:ALAU, tdb:AlAu-87Mur-LB.tdb:ALAU

TDB models of ALAU (3): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: ALAU, type code %, sha256 14d6262f7039c9ec…

50: PHASE ALAU % 2 1 1 !
51: CONST ALAU : AL : AU : !

AlAu-04Liu.tdb: ALAU, type code %, sha256 d847563ac9e3bbad…

45: PHASE ALAU % 2 1 1 !
46: CONST ALAU : AL : AU : !

AlAu-87Mur-LB.tdb: ALAU, type code %, sha256 0ec479200ccaf6a5…

61: PHASE ALAU % 2 1 1 !
62: CONST ALAU : AL : AU : !

Example references (5 of 5; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase
doi:10.1016/0025-5416(70)90083-2 Bruno Predel, Udo Schallner, Thermodynamische untersuchung der systeme aluminium-antimon und aluminium-gold, Materials Science and Engineering 5, 210-219 (1970).
cited as the source of values for this phase

ALAU2 (Al–Au)

Id: phase:al-au:alau2; status needs_review
No structure assigned. Why: mp_oqmd_space_groups_differ; no_structure_token; sgte_mmc2_rows_disagree
Candidate (dft_mp): Pnma (62) — on-hull MP AlAu2 at x(AU)=0.6667
Candidate (dft_oqmd): P21 (4) — on-hull OQMD Al1 Au2 at x(AU)=0.6667
Candidate (literature_printed): AlAu2 · oP30 — printed with a label mapped to this phase
Candidate (sgte_mmc2): AlAu2 · oP12 · Pnma (62) — Hallstedt 2025 mmc2 row for ALAU2: AlAu2 (alpha-AlAu2, Au-rich)
Candidate (sgte_mmc2): AlAu2 · oP30 · Pnnm (58) — Hallstedt 2025 mmc2 row for ALAU2: AlAu2 (beta-AlAu2, Au-poor)
Candidate (sgte_mmc2): MoSi2 · C11_b · tI6 · I4/mmm (139) — Hallstedt 2025 mmc2 row for ALAU2: AlAu2 (gamma-AlAu2, high T))
Candidate (tdb_comment): AlAu2 · oP12 · Pnma — AlAu-04Liu.tdb: 'Prototype AlAu2 (oP12, Pnma), alpha-AlAu2 (Au-rich)'
Candidate (tdb_comment): AlAu2 · oP30 · Pnnm — AlAu-04Liu.tdb: 'Prototype AlAu2 (oP30, Pnnm), beta-AlAu2 (Au-poor)'
Stoichiometry: Al 0.3333, Au 0.6667
Stability: stable in 2 of 2 calculated diagram(s): 300–895.83 K, x(Au) 0.66667–0.66667
Literature: 24 values (24 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:al-au:alau2
paper: paper:10.1007/bf02868887:AlAu2, paper:10.1007/bf02868887:αAlAu2, paper:10.1007/bf02868887:βAlAu2, paper:10.1007/bf02868887:γAlAu2
tdb: tdb:AlAu-04Liu.tdb:ALAU2, tdb:AlAu-87Mur-LB.tdb:ALAU2

TDB models of ALAU2 (2): PHASE and CONSTITUENT statements as written

AlAu-04Liu.tdb: ALAU2, type code %, sha256 d847563ac9e3bbad…

52: PHASE ALAU2 % 2 1 2 !
53: CONST ALAU2 : AL : AU : !

AlAu-87Mur-LB.tdb: ALAU2, type code %, sha256 0ec479200ccaf6a5…

68: PHASE ALAU2 % 2 1 2 !
69: CONST ALAU2 : AL : AU : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase
doi:10.1016/0025-5416(70)90083-2 Bruno Predel, Udo Schallner, Thermodynamische untersuchung der systeme aluminium-antimon und aluminium-gold, Materials Science and Engineering 5, 210-219 (1970).
cited as the source of values for this phase

ALAU2_ALPHA (Al–Au)

Id: phase:al-au:alau2-alpha; status assigned
Structure: AlAu2 · oP12 · Pnma (62); type st:alau2-op12; 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 1 of 1 calculated diagram(s): 300–835.5 K, x(Au) 0.66578–0.66665
Literature: 6 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-au:alau2-alpha
paper: paper:10.1016/j.jallcom.2004.05.007:α(AlAu2)
tdb: tdb:AlAu-04Li.tdb:ALAU2_ALPHA

TDB models of ALAU2_ALPHA (1): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: ALAU2_ALPHA, type code %, sha256 14d6262f7039c9ec…

55: PHASE ALAU2_ALPHA % 2 1 2 !
56: CONST ALAU2_ALPHA : AL : AL AU% : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase

ALAU2_BETA (Al–Au)

Id: phase:al-au:alau2-beta; status assigned
Structure: AlAu2 · oP30 · Pnnm (58); type st:alau2-op30; 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 1 of 1 calculated diagram(s): 300–833.5 K, x(Au) 0.65974–0.66541
Literature: 6 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-au:alau2-beta
paper: paper:10.1016/j.jallcom.2004.05.007:β(AlAu2)
tdb: tdb:AlAu-04Li.tdb:ALAU2_BETA

TDB models of ALAU2_BETA (1): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: ALAU2_BETA, type code %, sha256 14d6262f7039c9ec…

60: PHASE ALAU2_BETA % 2 1 2 !
61: CONST ALAU2_BETA : AL : AL AU% : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase

ALAU2_C11B (Al–Au)

Id: phase:al-au:alau2-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: partitioned order/disorder model in AlAu-04Li.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 819.53–896.27 K, x(Au) 0.65553–0.66904
Literature: 15 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-au:alau2-c11b
paper: paper:10.1016/j.jallcom.2004.05.007:γ(AlAu2)
tdb: tdb:AlAu-04Li.tdb:ALAU2_C11B

TDB models of ALAU2_C11B (1): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: ALAU2_C11B, type code %, sha256 14d6262f7039c9ec…

65: PHASE ALAU2_C11B % 2 1 2 !
66: CONST ALAU2_C11B : AL% AU : AL AU% : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase

ALAU4 (Al–Au)

Id: phase:al-au:alau4; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_rows_disagree
Candidate (dft_mp): P2_13 (198) — on-hull MP AlAu4 at x(AU)=0.8000
Candidate (dft_oqmd): P213 (198) — on-hull OQMD Al1 Au4 at x(AU)=0.8000
Candidate (literature_printed): AlAu4 · cP20 — printed with a label mapped to this phase
Candidate (sgte_mmc2): W · A2 · cI2 · Im-3m (229) — Hallstedt 2025 mmc2 row for ALAU4: AlAu4 (high T)
Candidate (sgte_mmc2): AlAu4 · cP20 · P2_13 (198) — Hallstedt 2025 mmc2 row for ALAU4: AlAu4 (low T)
Candidate (tdb_comment): AlAu4 · cP20 · P2_13 — AlAu-04Liu.tdb: 'Prototype AlAu4 (cP20, P2_13), low T'
Candidate (tdb_comment): AlAu4 · cP20 · P2_13 — AlAu-87Mur-LB.tdb: 'Prototype AlAu4 (cP20, P2_13), low T'
Candidate (tdb_comment): W · cI2 · Im-3m — AlAu-87Mur-LB.tdb: 'Prototype W (cI2, Im-3m), high T'
Stoichiometry: Al 0.2000, Au 0.8000
Stability: stable in 2 of 2 calculated diagram(s): 300–825.26 K, x(Au) 0.8–0.8
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:al-au:alau4
paper: paper:10.1007/bf02868887:AlAu4, paper:10.1007/bf02868887:β
tdb: tdb:AlAu-04Liu.tdb:ALAU4, tdb:AlAu-87Mur-LB.tdb:ALAU4

TDB models of ALAU4 (2): PHASE and CONSTITUENT statements as written

AlAu-04Liu.tdb: ALAU4, type code %, sha256 d847563ac9e3bbad…

62: PHASE ALAU4 % 2 1 4 !
63: CONST ALAU4 : AL : AU : !

AlAu-87Mur-LB.tdb: ALAU4, type code %, sha256 0ec479200ccaf6a5…

79: PHASE ALAU4 % 2 1 4 !
80: CONST ALAU4 : AL : AU : !

Example references (2 of 2; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase

ALAU4_A2 (Al–Au)

Id: phase:al-au:alau4-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): 772.56–818 K, x(Au) 0.80244–0.80658
Literature: 11 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-au:alau4-a2
paper: paper:10.1016/j.jallcom.2004.05.007:β(AlAu4)
tdb: tdb:AlAu-04Li.tdb:ALAU4_A2

TDB models of ALAU4_A2 (1): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: ALAU4_A2, type code %, sha256 14d6262f7039c9ec…

80: PHASE ALAU4_A2 % 2 1 4 !
81: CONST ALAU4_A2 : AL% AU : AU : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase
doi:10.1007/bf02868887 J. L. Murray, H. Okamoto, T. B. Massalski, The Al−Au (Aluminum-gold) system, Bulletin of Alloy Phase Diagrams 8, 20-30 (1987).
cited as the source of values for this phase

ALAU4_ALPHA (Al–Au)

Id: phase:al-au:alau4-alpha; status assigned
Structure: AlAu4 · cP20 · P2_13 (198); type st:alau4-cp20; 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, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Al 0.2000, Au 0.8000
Stability: stable in 1 of 1 calculated diagram(s): 300–783.58 K, x(Au) 0.8–0.8
Literature: 6 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:al-au:alau4-alpha
paper: paper:10.1016/j.jallcom.2004.05.007:AlAu4
tdb: tdb:AlAu-04Li.tdb:ALAU4_ALPHA

TDB models of ALAU4_ALPHA (1): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: ALAU4_ALPHA, type code %, sha256 14d6262f7039c9ec…

75: PHASE ALAU4_ALPHA % 2 1 4 !
76: CONST ALAU4_ALPHA : AL : AU : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868887 J. L. Murray, H. Okamoto, T. B. Massalski, The Al−Au (Aluminum-gold) system, Bulletin of Alloy Phase Diagrams 8, 20-30 (1987).
cited as the source of values for this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase

BCC_A2 (Al–Au)

Id: phase:al-au: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 3 calculated diagram(s): 759.39–815.16 K, x(Au) 0.81402–0.83278
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:al-au:bcc-a2
tdb: tdb:AlAu-04Li.tdb:BCC_A2, tdb:AlAu-04Liu.tdb:BCC_A2, tdb:AlAu-87Mur-LB.tdb:BCC_A2

TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: BCC_A2, type code %B, sha256 14d6262f7039c9ec…

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

AlAu-04Liu.tdb: BCC_A2, type code %B, sha256 d847563ac9e3bbad…

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

AlAu-87Mur-LB.tdb: BCC_A2, type code %B, sha256 0ec479200ccaf6a5…

46: PHASE BCC_A2 %B 2 1 3 !
47: CONST BCC_A2 : AL AU : VA : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase
doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase

FCC_A1 (Al–Au)

Id: phase:al-au: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 3 of 3 calculated diagram(s): 300–2499.83 K, x(Au) 0–1
Literature: 12 values (10 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:al-au:fcc-a1
paper: paper:10.1007/bf02868887:(Al), paper:10.1007/bf02868887:(Au), paper:10.1016/j.jallcom.2004.05.007:(Al), paper:10.1016/j.jallcom.2004.05.007:(Au)
tdb: tdb:AlAu-04Li.tdb:FCC_A1, tdb:AlAu-04Liu.tdb:FCC_A1, tdb:AlAu-87Mur-LB.tdb:FCC_A1

TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: FCC_A1, type code %A, sha256 14d6262f7039c9ec…

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

AlAu-04Liu.tdb: FCC_A1, type code %A, sha256 d847563ac9e3bbad…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : AL% AU% : VA : !

AlAu-87Mur-LB.tdb: FCC_A1, type code %A, sha256 0ec479200ccaf6a5…

41: PHASE FCC_A1 %A 2 1 1 !
42: CONST FCC_A1 : AL% AU% : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase

HCP_A3 (Al–Au)

Id: phase:al-au: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: not stable in 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:al-au:hcp-a3
tdb: tdb:AlAu-04Li.tdb:HCP_A3, tdb:AlAu-04Liu.tdb:HCP_A3, tdb:AlAu-87Mur-LB.tdb:HCP_A3

TDB models of HCP_A3 (3): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: HCP_A3, type code %A, sha256 14d6262f7039c9ec…

40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : AL AU : VA : !

AlAu-04Liu.tdb: HCP_A3, type code %A, sha256 d847563ac9e3bbad…

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

AlAu-87Mur-LB.tdb: HCP_A3, type code %A, sha256 0ec479200ccaf6a5…

51: PHASE HCP_A3 %A 2 1 0.5 !
52: CONST HCP_A3 : AL AU : VA : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase
doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase

LIQUID (Al–Au)

Id: phase:al-au:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 807.14–2500 K, x(Au) 0–1
Literature: 37 values (35 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:al-au:liquid
paper: paper:10.1007/bf02868887:L, paper:10.1007/bf02868887:β, paper:10.1016/j.jallcom.2004.05.007:L
tdb: tdb:AlAu-04Li.tdb:LIQUID, tdb:AlAu-04Liu.tdb:LIQUID, tdb:AlAu-87Mur-LB.tdb:LIQUID

TDB models of LIQUID (3): PHASE and CONSTITUENT statements as written

AlAu-04Li.tdb: LIQUID, type code %, sha256 14d6262f7039c9ec…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : AL AU : !

AlAu-04Liu.tdb: LIQUID, type code %, sha256 d847563ac9e3bbad…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : AL AU : !

AlAu-87Mur-LB.tdb: LIQUID, type code %, sha256 0ec479200ccaf6a5…

36: PHASE LIQUID:L % 1 1 !
37: CONST LIQUID:L : AL AU : !

Example references (5 of 5; assessments first):

doi:10.1007/BF02868887 J.L. Murray, H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 8, 20-30(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.05.007 Mei Li, Changrong Li, Fuming Wang, Degui Luo, Weijing Zhang, Thermodynamic assessment of the Al–Au system, Journal of Alloys and Compounds 385, 199-206 (2004).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2004-0009 H.S. Liu, J. Wang, Y. Du, Z.P. Jin, Z. Metallkd., 95, 45-49(2004).
assessment that models this phase
doi:10.1098/rsta.1900.0017 Charles Thomas Heycock, Francis Henry Neville, V. Gold-aluminium alloys, Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character 194, 201-232 (1900).
cited as the source of values for this phase
doi:10.2320/jinstmet1952.35.4_389 Kimio Itagaki, Akira Yazawa, Measurements of Heats of Mixing in Liquid Gold Binary Alloys, J.Japan Inst.Metals 35, 389-394 (1971).
cited as the source of 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}
}