Ga–Pb phases

5 phases (tier A 4, liquid 1); 3 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–Pb system page · Markdown · field reference

Phases of the Ga–Pb system (5)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
ORTHORHOMBIC_A11 phase:ga-pb:a11-orthorhombic	alpha-Ga · A11 · oC8 · Cmce (64)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–302.91 K, x(Pb) 0–0	3	2
BCC_A2 phase:ga-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:ga-pb:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2499.36 K, x(Pb) 0.9955–1	7	2
HCP_A3 phase:ga-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:ga-pb:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 302.89–2500 K, x(Pb) 0–1	868	2

ORTHORHOMBIC_A11 (Ga–Pb)

Id: phase:ga-pb: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): 300–302.91 K, x(Pb) 0–0
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ga-pb:a11-orthorhombic, corpus:phase:ga-pb:orthorhombic-a11
paper: paper:10.1007/bf02663678:Ga
tdb: tdb:GaPb-91Ans-LB.tdb:ORTHORHOMBIC_A11, tdb:GaPb-96Mat.tdb:ORTHORHOMBIC_A11

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

GaPb-91Ans-LB.tdb: ORTHORHOMBIC_A11, type code %, sha256 b7c0fac2fcf8ff89…

40: PHASE ORTHORHOMBIC_A11 % 1 1 !
41: CONST ORTHORHOMBIC_A11 : GA : !

GaPb-96Mat.tdb: ORTHORHOMBIC_A11, type code %, sha256 7659e972abe1c767…

42: PHASE ORTHORHOMBIC_A11 % 1 1 !
43: CONST ORTHORHOMBIC_A11 : GA : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02663678 I. Ansara, F. Ajersch, J. Phase Equilib., 12, 73-77(1991).
assessment that models this phase; reports values for this phase
doi:10.1016/0925-8388(95)02178-7 M. Mathon, J.M. Miane, P. Gaune, M. Gambino, J.P. Bros, Gallium + lead system: molar heat capacity and miscibility gap, Journal of Alloys and Compounds 237, 155-164 (1996).
assessment that models this phase
doi:10.1002/zaac.19322090318 N. A. Puschin, S. Stepanović, V. Stajić, Über die Legierungen des Galliums mit Zink, Cadmium, Quecksilber, Zinn, Blei, Wismut und Aluminium, Z. Anorg. Allg. Chem. 209, 329-334 (1932).
cited as the source of values for this phase

BCC_A2 (Ga–Pb)

Id: phase:ga-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:ga-pb:bcc-a2
tdb: tdb:GaPb-91Ans-LB.tdb:BCC_A2, tdb:GaPb-96Mat.tdb:BCC_A2

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

GaPb-91Ans-LB.tdb: BCC_A2, type code %B, sha256 b7c0fac2fcf8ff89…

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

GaPb-96Mat.tdb: BCC_A2, type code %B, sha256 7659e972abe1c767…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : GA PB : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/BF02663678 I. Ansara, F. Ajersch, J. Phase Equilib., 12, 73-77(1991).
assessment that models this phase
doi:10.1016/0925-8388(95)02178-7 M. Mathon, J.M. Miane, P. Gaune, M. Gambino, J.P. Bros, Gallium + lead system: molar heat capacity and miscibility gap, Journal of Alloys and Compounds 237, 155-164 (1996).
assessment that models this phase

FCC_A1 (Ga–Pb)

Id: phase:ga-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): 300–2499.36 K, x(Pb) 0.9955–1
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ga-pb:fcc-a1
paper: paper:10.1007/bf02663678:(Pb), paper:10.1007/bf02663678:Pb
tdb: tdb:GaPb-91Ans-LB.tdb:FCC_A1, tdb:GaPb-96Mat.tdb:FCC_A1

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

GaPb-91Ans-LB.tdb: FCC_A1, type code %A, sha256 b7c0fac2fcf8ff89…

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

GaPb-96Mat.tdb: FCC_A1, type code %A, sha256 7659e972abe1c767…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : GA PB : VA : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02663678 I. Ansara, F. Ajersch, J. Phase Equilib., 12, 73-77(1991).
assessment that models this phase; reports values for this phase
doi:10.1016/0925-8388(95)02178-7 M. Mathon, J.M. Miane, P. Gaune, M. Gambino, J.P. Bros, Gallium + lead system: molar heat capacity and miscibility gap, Journal of Alloys and Compounds 237, 155-164 (1996).
assessment that models this phase
doi:10.1002/zaac.19322090318 N. A. Puschin, S. Stepanović, V. Stajić, Über die Legierungen des Galliums mit Zink, Cadmium, Quecksilber, Zinn, Blei, Wismut und Aluminium, Z. Anorg. Allg. Chem. 209, 329-334 (1932).
cited as the source of values for this phase

HCP_A3 (Ga–Pb)

Id: phase:ga-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:ga-pb:hcp-a3
tdb: tdb:GaPb-91Ans-LB.tdb:HCP_A3, tdb:GaPb-96Mat.tdb:HCP_A3

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

GaPb-91Ans-LB.tdb: HCP_A3, type code %A, sha256 b7c0fac2fcf8ff89…

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

GaPb-96Mat.tdb: HCP_A3, type code %A, sha256 7659e972abe1c767…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : GA PB : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/BF02663678 I. Ansara, F. Ajersch, J. Phase Equilib., 12, 73-77(1991).
assessment that models this phase
doi:10.1016/0925-8388(95)02178-7 M. Mathon, J.M. Miane, P. Gaune, M. Gambino, J.P. Bros, Gallium + lead system: molar heat capacity and miscibility gap, Journal of Alloys and Compounds 237, 155-164 (1996).
assessment that models this phase

LIQUID (Ga–Pb)

Id: phase:ga-pb:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 302.89–2500 K, x(Pb) 0–1
Literature: 868 values (865 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:ga-pb:liquid
paper: paper:10.1007/bf02663678:L, paper:10.1007/bf02663678:L1, paper:10.1007/bf02663678:L2, paper:10.1016/0925-8388(95)02178-7:L2, paper:10.1016/0925-8388(95)02178-7:liquid
tdb: tdb:GaPb-91Ans-LB.tdb:LIQUID, tdb:GaPb-96Mat.tdb:LIQUID

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

GaPb-91Ans-LB.tdb: LIQUID, type code %, sha256 b7c0fac2fcf8ff89…

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

GaPb-96Mat.tdb: LIQUID, type code %, sha256 7659e972abe1c767…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : GA PB : !

Example references (6 of 6; assessments first):

doi:10.1016/0925-8388(95)02178-7 M. Mathon, J.M. Miane, P. Gaune, M. Gambino, J.P. Bros, Gallium + lead system: molar heat capacity and miscibility gap, Journal of Alloys and Compounds 237, 155-164 (1996).
assessment that models this phase; reports values for this phase
doi:10.1007/BF02663678 I. Ansara, F. Ajersch, J. Phase Equilib., 12, 73-77(1991).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(73)90149-5 A.F. Kwong, Z.A. Munir, Thermodynamic properties of liquid gallium-lead alloys, Journal of the Less Common Metals 30, 387-395 (1973).
cited as the source of values for this phase
doi:10.1021/je60056a024 Alessandro Desideri, Vincenzo Piacente, Thermodynamic properties of liquid gallium alloys. I. Gallium-lead, J. Chem. Eng. Data 18, 90-93 (1973).
cited as the source of values for this phase
doi:10.1002/zaac.19322090318 N. A. Puschin, S. Stepanović, V. Stajić, Über die Legierungen des Galliums mit Zink, Cadmium, Quecksilber, Zinn, Blei, Wismut und Aluminium, Z. Anorg. Allg. Chem. 209, 329-334 (1932).
cited as the source of values for this phase
doi:10.1016/0022-5088(71)90093-2 B Predel, D.W Stein, Thermodynamische Untersuchung der Systeme Gallium-Blei und Gallium-Thallium, Journal of the Less Common Metals 24, 159-171 (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}
}