Au–Pb phases

7 phases (tier A 5, tier C 1, liquid 1); 5 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–Pb system page · Markdown · field reference

Phases of the Au–Pb system (7)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AU2PB_C15 phase:au-pb:au2pb-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–706.92 K, x(Pb) 0.33333–0.33333	15	2
AUPB2_C16 phase:au-pb:aupb2-c16	Al2Cu · C16 · tI12 · I4/mcm (140)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–526.29 K, x(Pb) 0.66667–0.66667	18	2
AUPB3 phase:au-pb:aupb3	V3S · tI32 · I-42m (121)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–495.35 K, x(Pb) 0.75–0.75	20	2
BCC_A2 phase:au-pb:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
FCC_A1 phase:au-pb:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2499.52 K, x(Pb) 0–1	18	2
HCP_A3 phase:au-pb:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
LIQUID phase:au-pb:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 487.02–2500 K, x(Pb) 0–1	30	2

AU2PB_C15 (Au–Pb)

Id: phase:au-pb:au2pb-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Stoichiometry: Au 0.6667, Pb 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–706.92 K, x(Pb) 0.33333–0.33333
Literature: 15 values (15 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:au-pb:au2pb-c15
paper: paper:10.1016/j.calphad.2004.05.003:Au2Pb
tdb: tdb:AuPb-04Wan-LB.tdb:AU2PB_C15, tdb:AuPb-86Nab-LB.tdb:AU2PB_C15

TDB models of AU2PB_C15 (2): PHASE and CONSTITUENT statements as written

AuPb-04Wan-LB.tdb: AU2PB_C15, type code %, sha256 c40850c0dc0ef3a1…

46: PHASE AU2PB_C15 % 2 2 1 !
47: CONST AU2PB_C15 : AU : PB : !

AuPb-86Nab-LB.tdb: AU2PB_C15, type code %, sha256 7b2df32722d0e251…

40: PHASE AU2PB_C15 % 2 2 1 !
41: CONST AU2PB_C15 : AU : PB : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2004.05.003 J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Au–Pb system, Calphad 28, 91-95 (2004).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050450103 Rudolf Vogel, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. VII. Über Gold‐Bleilegierungen, Z. Anorg. Chem. 45, 11-23 (1905).
cited as the source of values for this phase
doi:10.1007/bf02868553 H. Okamoto, T. B. Massalski, The Au−Pb (Gold−Lead) system, Bulletin of Alloy Phase Diagrams 5, 276-284 (1984).
cited as the source of values for this phase

AUPB2_C16 (Au–Pb)

Id: phase:au-pb:aupb2-c16; status assigned
Structure: Al2Cu · C16 · tI12 · I4/mcm (140); type st:c16-al2cu-ti12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaabhst and oqmd-10126, space group 140
Stoichiometry: Au 0.3333, Pb 0.6667
Stability: stable in 2 of 2 calculated diagram(s): 300–526.29 K, x(Pb) 0.66667–0.66667
Literature: 18 values (18 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:au-pb:aupb2-c16
mp: mp:mp-aaaabhst
oqmd: oqmd:oqmd-10126
paper: paper:10.1016/j.calphad.2004.05.003:AuPb2
tdb: tdb:AuPb-04Wan-LB.tdb:AUPB2_C16, tdb:AuPb-86Nab-LB.tdb:AUPB2_C16

TDB models of AUPB2_C16 (2): PHASE and CONSTITUENT statements as written

AuPb-04Wan-LB.tdb: AUPB2_C16, type code %, sha256 c40850c0dc0ef3a1…

51: PHASE AUPB2_C16 % 2 1 2 !
52: CONST AUPB2_C16 : AU : PB : !

AuPb-86Nab-LB.tdb: AUPB2_C16, type code %, sha256 7b2df32722d0e251…

45: PHASE AUPB2_C16 % 2 1 2 !
46: CONST AUPB2_C16 : AU : PB : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2004.05.003 J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Au–Pb system, Calphad 28, 91-95 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868553 H. Okamoto, T. B. Massalski, The Au−Pb (Gold−Lead) system, Bulletin of Alloy Phase Diagrams 5, 276-284 (1984).
cited as the source of values for this phase
doi:10.1002/zaac.19050450103 Rudolf Vogel, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. VII. Über Gold‐Bleilegierungen, Z. Anorg. Chem. 45, 11-23 (1905).
cited as the source of values for this phase

AUPB3 (Au–Pb)

Id: phase:au-pb:aupb3; status assigned
Structure: V3S · tI32 · I-42m (121); type st:v3s-ti32; 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 0.2500, Pb 0.7500
Stability: stable in 2 of 2 calculated diagram(s): 300–495.35 K, x(Pb) 0.75–0.75
Literature: 20 values (20 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:au-pb:aupb3
paper: paper:10.1016/j.calphad.2004.05.003:AuPb3
tdb: tdb:AuPb-04Wan-LB.tdb:AUPB3, tdb:AuPb-86Nab-LB.tdb:AUPB3

TDB models of AUPB3 (2): PHASE and CONSTITUENT statements as written

AuPb-04Wan-LB.tdb: AUPB3, type code %, sha256 c40850c0dc0ef3a1…

56: PHASE AUPB3 % 2 1 3 !
57: CONST AUPB3 : AU : PB : !

AuPb-86Nab-LB.tdb: AUPB3, type code %, sha256 7b2df32722d0e251…

50: PHASE AUPB3 % 2 1 3 !
51: CONST AUPB3 : AU : PB : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2004.05.003 J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Au–Pb system, Calphad 28, 91-95 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868553 H. Okamoto, T. B. Massalski, The Au−Pb (Gold−Lead) system, Bulletin of Alloy Phase Diagrams 5, 276-284 (1984).
cited as the source of values for this phase
doi:10.1002/zaac.19050450103 Rudolf Vogel, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. VII. Über Gold‐Bleilegierungen, Z. Anorg. Chem. 45, 11-23 (1905).
cited as the source of values for this phase

BCC_A2 (Au–Pb)

Id: phase:au-pb: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 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-pb:bcc-a2
tdb: tdb:AuPb-04Wan-LB.tdb:BCC_A2, tdb:AuPb-86Nab-LB.tdb:BCC_A2

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

AuPb-04Wan-LB.tdb: BCC_A2, type code %B, sha256 c40850c0dc0ef3a1…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : AU PB : VA : !

AuPb-86Nab-LB.tdb: BCC_A2, type code %B, sha256 7b2df32722d0e251…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2004.05.003 J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Au–Pb system, Calphad 28, 91-95 (2004).
assessment that models this phase

FCC_A1 (Au–Pb)

Id: phase:au-pb: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 2 of 2 calculated diagram(s): 300–2499.52 K, x(Pb) 0–1
Literature: 18 values (18 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:au-pb:fcc-a1
paper: paper:10.1016/j.calphad.2004.05.003:fcc (Au), paper:10.1016/j.calphad.2004.05.003:fcc (Pb)
tdb: tdb:AuPb-04Wan-LB.tdb:FCC_A1, tdb:AuPb-86Nab-LB.tdb:FCC_A1

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

AuPb-04Wan-LB.tdb: FCC_A1, type code %A, sha256 c40850c0dc0ef3a1…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : AU% PB% : VA : !

AuPb-86Nab-LB.tdb: FCC_A1, type code %A, sha256 7b2df32722d0e251…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2004.05.003 J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Au–Pb system, Calphad 28, 91-95 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868553 H. Okamoto, T. B. Massalski, The Au−Pb (Gold−Lead) system, Bulletin of Alloy Phase Diagrams 5, 276-284 (1984).
cited as the source of values for this phase
doi:10.1002/zaac.19050450103 Rudolf Vogel, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. VII. Über Gold‐Bleilegierungen, Z. Anorg. Chem. 45, 11-23 (1905).
cited as the source of values for this phase

HCP_A3 (Au–Pb)

Id: phase:au-pb: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 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:au-pb:hcp-a3
tdb: tdb:AuPb-04Wan-LB.tdb:HCP_A3, tdb:AuPb-86Nab-LB.tdb:HCP_A3

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

AuPb-04Wan-LB.tdb: HCP_A3, type code %A, sha256 c40850c0dc0ef3a1…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : AU PB : VA : !

AuPb-86Nab-LB.tdb: HCP_A3, type code %A, sha256 7b2df32722d0e251…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2004.05.003 J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Au–Pb system, Calphad 28, 91-95 (2004).
assessment that models this phase

LIQUID (Au–Pb)

Id: phase:au-pb:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 487.02–2500 K, x(Pb) 0–1
Literature: 30 values (30 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:au-pb:liquid
paper: paper:10.1016/j.calphad.2004.05.003:L
tdb: tdb:AuPb-04Wan-LB.tdb:LIQUID, tdb:AuPb-86Nab-LB.tdb:LIQUID

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

AuPb-04Wan-LB.tdb: LIQUID, type code %, sha256 c40850c0dc0ef3a1…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : AU PB : !

AuPb-86Nab-LB.tdb: LIQUID, type code %, sha256 7b2df32722d0e251…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2004.05.003 J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Au–Pb system, Calphad 28, 91-95 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868553 H. Okamoto, T. B. Massalski, The Au−Pb (Gold−Lead) system, Bulletin of Alloy Phase Diagrams 5, 276-284 (1984).
cited as the source of values for this phase
doi:10.1002/zaac.19050450103 Rudolf Vogel, Metallographische Mitteilungen aus dem Institut für anorganische Chemie der Universität Göttingen. VII. Über Gold‐Bleilegierungen, Z. Anorg. Chem. 45, 11-23 (1905).
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}
}