In–Pb phases

6 phases (tier A 4, tier C 1, liquid 1); 4 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 · In–Pb system page · Markdown · field reference

Phases of the In–Pb system (6)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
TETRAGONAL_A6 phase:in-pb:a6-tetragonal	In · A6 · tI2 · I4/mmm (139)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 299.48–434.61 K, x(Pb) 0–0.21183	3	3
BCC_A2 phase:in-pb:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
FCC_A1 phase:in-pb:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 299.22–600.61 K, x(Pb) 0.29005–1	2	3
HCP_A3 phase:in-pb: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:in-pb:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 429.38–2500 K, x(Pb) 0–1	5	3
TET_ALPHA1_A6 phase:in-pb:tet-a6-alpha1	In · A6 · tI2 · I4/mmm (139)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 299.22–449.42 K, x(Pb) 0.11316–0.33307	0	3

TETRAGONAL_A6 (In–Pb)

Id: phase:in-pb:a6-tetragonal; status assigned
Structure: In · A6 · tI2 · I4/mmm (139); type st:a6-in-ti2; tier A: standard phase name; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 299.48–434.61 K, x(Pb) 0–0.21183
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:in-pb:a6-tetragonal, corpus:phase:in-pb:tetragonal-a6
paper: paper:10.1016/j.tca.2003.10.020:(In)
tdb: tdb:InPb-04Dav.tdb:TETRAGONAL_A6, tdb:InPb-86Nab.tdb:TETRAGONAL_A6, tdb:InPb-98Boa-LB.tdb:TETRAGONAL_A6

TDB models of TETRAGONAL_A6 (3): PHASE and CONSTITUENT statements as written

InPb-04Dav.tdb: TETRAGONAL_A6, type code %, sha256 fa3de4d2af4fda20…

42: PHASE TETRAGONAL_A6 % 1 1 !
43: CONST TETRAGONAL_A6 : IN% PB : !

InPb-86Nab.tdb: TETRAGONAL_A6, type code %, sha256 df14085f845d9d70…

40: PHASE TETRAGONAL_A6 % 1 1 !
41: CONST TETRAGONAL_A6 : IN% PB : !

InPb-98Boa-LB.tdb: TETRAGONAL_A6, type code %, sha256 f26e4bea07c1978f…

45: PHASE TETRAGONAL_A6 % 1 1 !
46: CONST TETRAGONAL_A6 : IN% PB : !

Example references (2 of 2; assessments first):

doi:10.1016/j.tca.2003.10.020 N David, Khadija El Aissaoui, J.M Fiorani, J Hertz, M Vilasi, Thermodynamic optimization of the In–Pb–Sn system based on new evaluations of the binary borders In–Pb and In–Sn, Thermochimica Acta 413, 127-137 (2004).
assessment that models this phase; reports values for this phase
doi:10.1016/S0040-6031(98)00237-8 D. Boa, I. Ansara, Thermochim. Acta, 314, 79-86 (1998).
assessment that models this phase

BCC_A2 (In–Pb)

Id: phase:in-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 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:in-pb:bcc-a2
tdb: tdb:InPb-04Dav.tdb:BCC_A2, tdb:InPb-86Nab.tdb:BCC_A2, tdb:InPb-98Boa-LB.tdb:BCC_A2

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

InPb-04Dav.tdb: BCC_A2, type code %B, sha256 fa3de4d2af4fda20…

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

InPb-86Nab.tdb: BCC_A2, type code %B, sha256 df14085f845d9d70…

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

InPb-98Boa-LB.tdb: BCC_A2, type code %B, sha256 f26e4bea07c1978f…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : IN PB : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.tca.2003.10.020 N David, Khadija El Aissaoui, J.M Fiorani, J Hertz, M Vilasi, Thermodynamic optimization of the In–Pb–Sn system based on new evaluations of the binary borders In–Pb and In–Sn, Thermochimica Acta 413, 127-137 (2004).
assessment that models this phase
doi:10.1016/S0040-6031(98)00237-8 D. Boa, I. Ansara, Thermochim. Acta, 314, 79-86 (1998).
assessment that models this phase

FCC_A1 (In–Pb)

Id: phase:in-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 3 of 3 calculated diagram(s): 299.22–600.61 K, x(Pb) 0.29005–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:in-pb:fcc-a1
paper: paper:10.1016/j.tca.2003.10.020:(Pb)
tdb: tdb:InPb-04Dav.tdb:FCC_A1, tdb:InPb-86Nab.tdb:FCC_A1, tdb:InPb-98Boa-LB.tdb:FCC_A1

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

InPb-04Dav.tdb: FCC_A1, type code %A, sha256 fa3de4d2af4fda20…

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

InPb-86Nab.tdb: FCC_A1, type code %A, sha256 df14085f845d9d70…

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

InPb-98Boa-LB.tdb: FCC_A1, type code %A, sha256 f26e4bea07c1978f…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : IN PB : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.tca.2003.10.020 N David, Khadija El Aissaoui, J.M Fiorani, J Hertz, M Vilasi, Thermodynamic optimization of the In–Pb–Sn system based on new evaluations of the binary borders In–Pb and In–Sn, Thermochimica Acta 413, 127-137 (2004).
assessment that models this phase; reports values for this phase
doi:10.1016/S0040-6031(98)00237-8 D. Boa, I. Ansara, Thermochim. Acta, 314, 79-86 (1998).
assessment that models this phase

HCP_A3 (In–Pb)

Id: phase:in-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 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:in-pb:hcp-a3
tdb: tdb:InPb-04Dav.tdb:HCP_A3, tdb:InPb-86Nab.tdb:HCP_A3, tdb:InPb-98Boa-LB.tdb:HCP_A3

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

InPb-04Dav.tdb: HCP_A3, type code %A, sha256 fa3de4d2af4fda20…

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

InPb-86Nab.tdb: HCP_A3, type code %A, sha256 df14085f845d9d70…

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

InPb-98Boa-LB.tdb: HCP_A3, type code %A, sha256 f26e4bea07c1978f…

40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : IN PB : VA: !

Example references (2 of 2; assessments first):

doi:10.1016/j.tca.2003.10.020 N David, Khadija El Aissaoui, J.M Fiorani, J Hertz, M Vilasi, Thermodynamic optimization of the In–Pb–Sn system based on new evaluations of the binary borders In–Pb and In–Sn, Thermochimica Acta 413, 127-137 (2004).
assessment that models this phase
doi:10.1016/S0040-6031(98)00237-8 D. Boa, I. Ansara, Thermochim. Acta, 314, 79-86 (1998).
assessment that models this phase

LIQUID (In–Pb)

Id: phase:in-pb:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 429.38–2500 K, x(Pb) 0–1
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:in-pb:liquid
paper: paper:10.1016/j.tca.2003.10.020:L
tdb: tdb:InPb-04Dav.tdb:LIQUID, tdb:InPb-86Nab.tdb:LIQUID, tdb:InPb-98Boa-LB.tdb:LIQUID

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

InPb-04Dav.tdb: LIQUID, type code %, sha256 fa3de4d2af4fda20…

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

InPb-86Nab.tdb: LIQUID, type code %, sha256 df14085f845d9d70…

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

InPb-98Boa-LB.tdb: LIQUID, type code %, sha256 f26e4bea07c1978f…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : IN PB : !

Example references (2 of 2; assessments first):

doi:10.1016/j.tca.2003.10.020 N David, Khadija El Aissaoui, J.M Fiorani, J Hertz, M Vilasi, Thermodynamic optimization of the In–Pb–Sn system based on new evaluations of the binary borders In–Pb and In–Sn, Thermochimica Acta 413, 127-137 (2004).
assessment that models this phase; reports values for this phase
doi:10.1016/S0040-6031(98)00237-8 D. Boa, I. Ansara, Thermochim. Acta, 314, 79-86 (1998).
assessment that models this phase

TET_ALPHA1_A6 (In–Pb)

Id: phase:in-pb:tet-a6-alpha1; status assigned
Structure: In · A6 · tI2 · I4/mmm (139); type st:a6-in-ti2; 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 (unrecognised_name_tokens:ALPHA1); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 3 of 3 calculated diagram(s): 299.22–449.42 K, x(Pb) 0.11316–0.33307
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:in-pb:tet-a6-alpha1
tdb: tdb:InPb-04Dav.tdb:TET_ALPHA1_A6, tdb:InPb-86Nab.tdb:TET_ALPHA1_A6, tdb:InPb-98Boa-LB.tdb:TET_ALPHA1_A6

TDB models of TET_ALPHA1_A6 (3): PHASE and CONSTITUENT statements as written

InPb-04Dav.tdb: TET_ALPHA1_A6, type code %, sha256 fa3de4d2af4fda20…

47: PHASE TET_ALPHA1_A6 % 1 1 !
48: CONST TET_ALPHA1_A6 : IN PB : !

InPb-86Nab.tdb: TET_ALPHA1_A6, type code %, sha256 df14085f845d9d70…

45: PHASE TET_ALPHA1_A6 % 1 1 !
46: CONST TET_ALPHA1_A6 : IN PB : !

InPb-98Boa-LB.tdb: TET_ALPHA1_A6, type code %, sha256 f26e4bea07c1978f…

50: PHASE TET_ALPHA1_A6 % 1 1 !
51: CONST TET_ALPHA1_A6 : IN PB : !

Example references (2 of 2; assessments first):

doi:10.1016/j.tca.2003.10.020 N David, Khadija El Aissaoui, J.M Fiorani, J Hertz, M Vilasi, Thermodynamic optimization of the In–Pb–Sn system based on new evaluations of the binary borders In–Pb and In–Sn, Thermochimica Acta 413, 127-137 (2004).
assessment that models this phase
doi:10.1016/S0040-6031(98)00237-8 D. Boa, I. Ansara, Thermochim. Acta, 314, 79-86 (1998).
assessment that models 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}
}