Pb–Se system

18 accepted literature values from 1 paper(s) (experimental 13, model 5); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	13
model	5

Accepted values by property group
Property group	Values
invariant reaction	6
phase transition	5
formation	7

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
PbSe-12Liu.tdb	Y. Liu, Z. Kang, G. Sheng, L. Zhang, J. Wang, Z. Long, J. Electron. Mater., 41, 1915-23(2012). doi:10.1007/s11664-012-2016-7	`21a9660077aab9c062899dfd49fdc8b7a74b33b99b390e57e0fdc36e66ee65fb`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
PbSe-12Liu.tdb	949.71	PBSE_B1 (x(Se) 0.5) + LIQUID (x(Se) 0.74529) + LIQUID#2 (x(Se) 0.97081)
PbSe-12Liu.tdb	600.1	FCC_A1 (x(Se) 0) + LIQUID (x(Se) 8.300e-4) + PBSE_B1 (x(Se) 0.5)
PbSe-12Liu.tdb	493.99	PBSE_B1 (x(Se) 0.5) + LIQUID (x(Se) 0.99998) + HEXAGONAL_A8 (x(Se) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Pb–Se system (6)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
954	monotectic: liq#1 -> liq#2 + PbSe	PbSe: Se 0.5; liq#1: Se 0.76	experimental	[1] Liu 2012 cites Nozato 1955	Table VII, p. 8, row 3 report
951.3	monotectic: liq#1 -> liq#2 + PbSe	PbSe: Pb 0.5, Se 0.5; liq#1: Se 0.761	experimental	[1] Liu 2012 cites Seidman 1966	Table VII, p. 8, row 4 report
947.2	monotectic: liq#1 -> liq#2 + PbSe	PbSe: Se 0.5; liq#1: Se 0.746	model	[1] Liu 2012	Table VII, p. 8, row 5 report
600.3	eutectic: liq -> (Pb) + PbSe	L: Se 0; (Pb): Se 0; PbSe: Se 0.5	experimental	[1] Liu 2012 cites Greenwood 1939	Table VII, p. 8, row 1 report
600	eutectic: liq -> (Pb) + PbSe	L: Se 0; (Pb): Se 0; PbSe: Se 0.5	model	[1] Liu 2012	Table VII, p. 8, row 2 report
493.9	eutectic: liq -> (Se) + PbSe	L: Se 1; (Se): Se 1; PbSe: Se 0.5	model	[1] Liu 2012	Table VII, p. 8, row 6 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Pb–Se system (7)
Phase	Value	T (K)	Class	Source	Location
PbSe	-105 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2012 cites ref. 36	Table IX, p. 8, row 2 report
PbSe	-100.3 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2012 cites Shamsuddin 1973	Table IX, p. 8, row 6 report
PbSe	-99.78 kJ/mol (basis unstated)		model	[1] Liu 2012	Table IX, p. 8, row 7 report
PbSe	-99.5 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2012 cites ref. 38	Table IX, p. 8, row 4 report
PbSe	-99.26 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2012 cites Deore 2008 doi	Table IX, p. 8, row 1 report
PbSe	-96.3 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2012 cites ref. 37	Table IX, p. 8, row 3 report
PbSe	-95.1 kJ/mol (basis unstated)	298.15	experimental	[1] Liu 2012 cites ref. 39	Table IX, p. 8, row 5 report

Other properties

Phase transition (5)

Phase transition, Pb–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1349 K	1349	congruent transformation	experimental	[1] Liu 2012 cites Nozato 1955	Table VIII, p. 8, row 2 report
Phase transition	1352 K	1352	congruent transformation	model	[1] Liu 2012	Table VIII, p. 8, row 5 report
Phase transition	1353.7 K	1353.7	congruent transformation	experimental	[1] Liu 2012 cites Miller 1966	Table VIII, p. 8, row 4 report
Phase transition	1353.7 K	1353.7	congruent transformation	experimental	[1] Liu 2012 cites Seidman 1961	Table VIII, p. 8, row 3 report
Phase transition	1361 K	1361	congruent transformation	experimental	[1] Liu 2012 cites Friedrich 1908	Table VIII, p. 8, row 1 report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

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). doi:10.1007/s11664-012-2016-7

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
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 the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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). 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_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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}
}