Pb–Se phases

6 phases (tier A 5, 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 · Pb–Se system page · Markdown · field reference

Phases of the Pb–Se system (6)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
HEXAGONAL_A8 phase:pb-se:a8-hexagonal	gamma-Se · A8 · hP3 · P3_121 (152)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–493.99 K, x(Se) 1–1	1	1
BCC_A2 phase:pb-se: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:pb-se:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–601.1 K, x(Se) 0–0	2	1
HCP_A3 phase:pb-se:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
LIQUID phase:pb-se:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 493.99–2500 K, x(Se) 0–1	6	1
PBSE_B1 phase:pb-se:pbse-b1	NaCl · B1 · cF8 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1352.04 K, x(Se) 0.5–0.5	6	1

HEXAGONAL_A8 (Pb–Se)

Id: phase:pb-se:a8-hexagonal; status assigned
Structure: gamma-Se · A8 · hP3 · P3_121 (152); type st:a8-gamma-se-hp3; tier A: standard phase name; confidence high
Stoichiometry: Se 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–493.99 K, x(Se) 1–1
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:pb-se:a8-hexagonal, corpus:phase:pb-se:hexagonal-a8
paper: paper:10.1007/s11664-012-2016-7:(Se)
tdb: tdb:PbSe-12Liu.tdb:HEXAGONAL_A8

TDB models of HEXAGONAL_A8 (1): PHASE and CONSTITUENT statements as written

PbSe-12Liu.tdb: HEXAGONAL_A8, type code %, sha256 21a9660077aab9c0…

45: PHASE HEXAGONAL_A8 % 1 1 !
46: CONST HEXAGONAL_A8 : SE : !

Example references (1 of 1; assessments first):

doi:10.1007/s11664-012-2016-7 Yajun Liu, Zhitao Kang, Guang Sheng, Lijun Zhang, Jiang Wang, Zhaohui Long, Phase Equilibria and Thermodynamic Basis for the Cd-Se and Pb-Se Binary Systems, Journal of Elec Materi 41, 1915-1923 (2012).
assessment that models this phase; reports values for this phase

BCC_A2 (Pb–Se)

Id: phase:pb-se:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stoichiometry: Pb 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:pb-se:bcc-a2
tdb: tdb:PbSe-12Liu.tdb:BCC_A2

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

PbSe-12Liu.tdb: BCC_A2, type code %B, sha256 21a9660077aab9c0…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11664-012-2016-7 Yajun Liu, Zhitao Kang, Guang Sheng, Lijun Zhang, Jiang Wang, Zhaohui Long, Phase Equilibria and Thermodynamic Basis for the Cd-Se and Pb-Se Binary Systems, Journal of Elec Materi 41, 1915-1923 (2012).
assessment that models this phase

FCC_A1 (Pb–Se)

Id: phase:pb-se:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Pb 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–601.1 K, x(Se) 0–0
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:pb-se:fcc-a1
paper: paper:10.1007/s11664-012-2016-7:(Pb)
tdb: tdb:PbSe-12Liu.tdb:FCC_A1

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

PbSe-12Liu.tdb: FCC_A1, type code %A, sha256 21a9660077aab9c0…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11664-012-2016-7 Yajun Liu, Zhitao Kang, Guang Sheng, Lijun Zhang, Jiang Wang, Zhaohui Long, Phase Equilibria and Thermodynamic Basis for the Cd-Se and Pb-Se Binary Systems, Journal of Elec Materi 41, 1915-1923 (2012).
assessment that models this phase; reports values for this phase

HCP_A3 (Pb–Se)

Id: phase:pb-se:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stoichiometry: Pb 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:pb-se:hcp-a3
tdb: tdb:PbSe-12Liu.tdb:HCP_A3

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

PbSe-12Liu.tdb: HCP_A3, type code %A, sha256 21a9660077aab9c0…

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

Example references (1 of 1; assessments first):

doi:10.1007/s11664-012-2016-7 Yajun Liu, Zhitao Kang, Guang Sheng, Lijun Zhang, Jiang Wang, Zhaohui Long, Phase Equilibria and Thermodynamic Basis for the Cd-Se and Pb-Se Binary Systems, Journal of Elec Materi 41, 1915-1923 (2012).
assessment that models this phase

LIQUID (Pb–Se)

Id: phase:pb-se:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 493.99–2500 K, x(Se) 0–1
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:pb-se:liquid
paper: paper:10.1007/s11664-012-2016-7:L, paper:10.1007/s11664-012-2016-7:liq#1
tdb: tdb:PbSe-12Liu.tdb:LIQUID

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

PbSe-12Liu.tdb: LIQUID, type code %, sha256 21a9660077aab9c0…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : PB PBSE SE : !

Example references (1 of 1; assessments first):

doi:10.1007/s11664-012-2016-7 Yajun Liu, Zhitao Kang, Guang Sheng, Lijun Zhang, Jiang Wang, Zhaohui Long, Phase Equilibria and Thermodynamic Basis for the Cd-Se and Pb-Se Binary Systems, Journal of Elec Materi 41, 1915-1923 (2012).
assessment that models this phase; reports values for this phase

PBSE_B1 (Pb–Se)

Id: phase:pb-se:pbse-b1; status assigned
Structure: NaCl · B1 · cF8 · Fm-3m (225); type st:b1-nacl-cf8; tier A: standard phase name; confidence high
Stoichiometry: Pb 0.5000, Se 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1352.04 K, x(Se) 0.5–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:pb-se:pbse-b1
paper: paper:10.1007/s11664-012-2016-7:PbSe
tdb: tdb:PbSe-12Liu.tdb:PBSE_B1

TDB models of PBSE_B1 (1): PHASE and CONSTITUENT statements as written

PbSe-12Liu.tdb: PBSE_B1, type code %, sha256 21a9660077aab9c0…

50: PHASE PBSE_B1 % 2 1 1 !
51: CONST PBSE_B1 : PB : SE : !

Example references (1 of 1; assessments first):

doi:10.1007/s11664-012-2016-7 Yajun Liu, Zhitao Kang, Guang Sheng, Lijun Zhang, Jiang Wang, Zhaohui Long, Phase Equilibria and Thermodynamic Basis for the Cd-Se and Pb-Se Binary Systems, Journal of Elec Materi 41, 1915-1923 (2012).
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}
}