Pb–Tl system

3 accepted literature values from 1 paper(s) (model 3); 1 calculated phase diagram(s). 3 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 (4) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
model	3

Accepted values by property group
Property group	Values
invariant reaction	2
phase transition	1

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
PbTl-01Fri-LB.tdb	S.G. Fries, I. Ansara, H.L. Lukas, J. Alloys Compd., 320, 228-33(2001). doi:10.1016/S0925-8388(00)01492-4	`dd4f1c557a9b7253b2c666451e38a35788a38a484aa4f26c801c826da1f05449`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
PbTl-01Fri-LB.tdb	585.03	FCC_A1 (x(Tl) 0.88918) + BCC_A2 (x(Tl) 0.93658) + LIQUID (x(Tl) 0.9437)
PbTl-01Fri-LB.tdb	443.19	FCC_A1 (x(Tl) 0.90208) + BCC_A2 (x(Tl) 0.94939) + HCP_A3 (x(Tl) 0.95712)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Pb–Tl system (2)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
585	peritectic: liquid+fcc⇌bcc	liquid: Tl 0.944; fcc: Tl 0.889; bcc: Tl 0.937	model	[1] Fries 2001	Table 4, p. 4, row 2 report
443.2	eutectoid: bcc⇌hcp+fcc	bcc: Tl 0.949; hcp: Tl 0.957; fcc: Tl 0.902	model	[1] Fries 2001	Table 4, p. 4, row 3 report

Other properties

Phase transition (1)

Phase transition, Pb–Tl system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	651.1 K	651.1	congruent melting: liquid⇌fcc liquid: Tl 0.625; fcc: Tl 0.625	model	[1] Fries 2001	Table 4, p. 4, row 1 report

Sources

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

S.G Fries, I Ansara, H.L Lukas, Thermodynamic optimisation of the Pb–Tl binary system, Journal of Alloys and Compounds 320, 228-233 (2001). doi:10.1016/s0925-8388(00)01492-4

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}
}