Pb–Zr system

15 accepted literature values from 1 paper(s) (experimental 7, model 5, unspecified 3); 1 calculated phase diagram(s). 9 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	7
model	5
unspecified	3

Accepted values by property group
Property group	Values
invariant reaction	10
phase transition	2
phase equilibrium	3

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
PbZr-98Dix.tdb	P.R. Dixon, B.B. Argent, T.G. Chart, Calphad, 22, 397-416(1998). doi:10.1016/S0364-5916(98)00039-X	`1620ca23b0d702d2c9153adc447b0dd0c7f72851b39ade956e6b0a8f8fdb1789`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
PbZr-98Dix.tdb	1917.22	PB3ZR5_D88 (x(Zr) 0.625) + LIQUID (x(Zr) 0.79582) + BCC_A2 (x(Zr) 0.89314)
PbZr-98Dix.tdb	1917.22	PB3ZR5_D88 (x(Zr) 0.625) + LIQUID (x(Zr) 0.79593) + BCC_A2 (x(Zr) 0.89321)
PbZr-98Dix.tdb	1542.95	PB2ZR (x(Zr) 0.33333) + LIQUID (x(Zr) 0.365) + PB3ZR5_D88 (x(Zr) 0.625)
PbZr-98Dix.tdb	1542.94	PB2ZR (x(Zr) 0.33333) + LIQUID (x(Zr) 0.36451) + PB3ZR5_D88 (x(Zr) 0.625)
PbZr-98Dix.tdb	1516.79	PB3ZR5_D88 (x(Zr) 0.625) + PBZR4_A15 (x(Zr) 0.8) + BCC_A2 (x(Zr) 0.87052)
PbZr-98Dix.tdb	1516.79	PB3ZR5_D88 (x(Zr) 0.625) + PBZR4_A15 (x(Zr) 0.8) + BCC_A2 (x(Zr) 0.87036)
PbZr-98Dix.tdb	1516.79	PB3ZR5_D88 (x(Zr) 0.625) + PBZR4_A15 (x(Zr) 0.8) + BCC_A2 (x(Zr) 0.87052)
PbZr-98Dix.tdb	1210.28	PBZR4_A15 (x(Zr) 0.8) + HCP_A3 (x(Zr) 0.94268) + BCC_A2 (x(Zr) 0.95867)
PbZr-98Dix.tdb	1210.28	PBZR4_A15 (x(Zr) 0.8) + HCP_A3 (x(Zr) 0.94278) + BCC_A2 (x(Zr) 0.95877)
PbZr-98Dix.tdb	770.7	PB2ZR (x(Zr) 0.33333) + PB3ZR5_D88 (x(Zr) 0.625) + PBZR4_A15 (x(Zr) 0.8)
PbZr-98Dix.tdb	631	LIQUID (x(Zr) 0.00376) + FCC_A1 (x(Zr) 0.03331) + PB2ZR (x(Zr) 0.33333)
PbZr-98Dix.tdb	631	LIQUID (x(Zr) 0.00374) + FCC_A1 (x(Zr) 0.0332) + PB2ZR (x(Zr) 0.33333)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Pb–Zr system (10)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1917	eutectic: Eutectic between β, liquid and Zr5Pb3	β: Zr 0.893; liquid: Zr 0.796; Zr5Pb3: Zr 0.625	model	[1] Dixon 1998	Table 12, p. 18, row 1 report
1903	eutectic: Eutectic between β, liquid and Zr5Pb3	β: Zr 0.89; liquid: Zr 0.78; Zr5Pb3: Zr 0.625	experimental	[1] Dixon 1998	Table 12, p. 18, row 2 report
1673	eutectic: Eutectic between β, liquid and Zr5Pb3	liquid: Zr 0.77; Zr5Pb3: Zr 0.625	experimental	[1] Dixon 1998	Table 12, p. 18, row 3 report
1518	peritectoid: Peritectoid between β, Zr4Pb and Zr5Pb3	β: Zr 0.87; Zr4Pb: Zr 0.8; Zr5Pb3: Zr 0.625	experimental	[1] Dixon 1998	Table 12, p. 18, row 5 report
1517	peritectoid: Peritectoid between β, Zr4Pb and Zr5Pb3	β: Zr 0.871; Zr4Pb: Zr 0.8; Zr5Pb3: Zr 0.625	model	[1] Dixon 1998	Table 12, p. 18, row 4 report
1210	peritectoid: Peritectoid between β, α and Zr4Pb	β: Zr 0.959; α: Zr 0.943; Zr4Pb: Zr 0.8	model	[1] Dixon 1998	Table 12, p. 18, row 6 report
1188	peritectoid: Peritectoid between β, α and Zr4Pb	β: Zr 0.98; α: Zr 0.945; Zr4Pb: Zr 0.8	experimental	[1] Dixon 1998	Table 12, p. 18, row 7 report
1173	peritectoid: Peritectoid between β, α and Zr4Pb	Zr4Pb: Zr 0.8	experimental	[1] Dixon 1998	Table 12, p. 18, row 10 report
1173	peritectoid: Peritectoid between β, α and Zr4Pb	α: Zr 0.94; Zr4Pb: Zr 0.8	experimental	[1] Dixon 1998	Table 12, p. 18, row 8 report
1163	peritectoid: Peritectoid between β, α and Zr4Pb	α: Zr 0.95; Zr4Pb: Zr 0.8	experimental	[1] Dixon 1998	Table 12, p. 18, row 9 report

Other properties

Phase transition (2)

Phase transition, Pb–Zr system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1547 K	1547	congruent transformation	model	[1] Dixon 1998	p. 18 report	Congruent melting points of 2242K (Zr#b,) and 1547K (ZrPb) were also predicted although it must be remembered that there is no experimental evidence for ZrPb2 and in fact the compound richest in lead that has been reported (3 1) is Zr#b,(Ti& structure).
Phase transition	2242 K	2242	congruent transformation	model	[1] Dixon 1998	p. 18 report	Congruent melting points of 2242K (Zr#b,) and 1547K (ZrPb) were also predicted although it must be remembered that there is no experimental evidence for ZrPb2 and in fact the compound richest in lead that has been reported (3 1) is Zr#b,(Ti& structure).

Phase equilibrium (3)

Phase equilibrium, Pb–Zr system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	973.15	α α: Pb 0.044, Zr 0.956	unspecified	[1] Dixon 1998	Table 4b, p. 9, row 1 report
Phase composition	1073.15	α α: Pb 0.054, Zr 0.946	unspecified	[1] Dixon 1998	Table 4b, p. 9, row 2 report
Phase composition	1173.15	α α: Pb 0.055, Zr 0.945	unspecified	[1] Dixon 1998	Table 4b, p. 9, row 3 report

Sources

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

P.R. Dixon, B.B. Argent, T.G. Chart, The alloy systems zirconium-cerium and zirconium-lead, Calphad 22, 397-416 (1998). doi:10.1016/s0364-5916(98)00039-x

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}
}