Ag–Pt system

68 accepted literature values from 1 paper(s) (experimental 28, model 40); 2 calculated phase diagram(s). 2 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
experimental	28
model	40

Accepted values by property group
Property group	Values
invariant reaction	5
phase equilibrium	43
crystal structure	20

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
AgPt-87Kar.tdb	I. Karakaya, W.T. Thompson, Bull. Alloy Phase Diag., 8, 334-40(1987). doi:10.1007/BF02869269	`8f1b7c8efd759d85fd7f42982ce1b6a6f8ef476b2a97b7f64c034036e47e3405`	viewer · TDB · JSON
AgPt-98Spe-LB.tdb	P.J. Spencer, unpublished, 1998.	`8e3cf7fc3b829b06ed29e597b3366d293b13a00dcf5b62c6efadb94a7beb5f2a`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AgPt-87Kar.tdb	1472.28	LIQUID (x(Pt) 0.19403) + FCC_A1#2 (x(Pt) 0.40847) + FCC_A1 (x(Pt) 0.7764)
AgPt-98Spe-LB.tdb	1459.08	LIQUID (x(Pt) 0.25107) + FCC_A1#2 (x(Pt) 0.44126) + FCC_A1 (x(Pt) 0.76073)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull AgPt-87Kar

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ag–Pt system (5)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1459.15	peritectic: L + (Pt) -> (Ag)	L: Pt 0.201; (Pt): Pt 0.779; (Ag): Pt 0.406	model	[1] Karakaya 1987	Table 1, p. 1, row 1 report
1173.15	eutectoid: (Ag) -> α' + (Pt)	(Ag): Pt 0.344; α': Pt 0.325; (Pt): Pt 0.843; α′: Pt 0.325	model	[1] Karakaya 1987	Table 1, p. 1, row 2 report
1013.15	peritectoid: α' + (Pt) -> β	α': Pt 0.31; (Pt): Pt 0.85; β: Pt 0.5; α′: Pt 0.31	model	[1] Karakaya 1987	Table 1, p. 1, row 3 report
973.15	peritectoid: β + (Pt) -> γ	β: Pt 0.53; (Pt): Pt 0.915; γ: Pt 0.75	model	[1] Karakaya 1987	Table 1, p. 1, row 4 report
943.15	peritectoid: α" + β -> β'	α": Pt 0.275; β: Pt 0.465; β': Pt 0.445; α″: Pt 0.275; β′: Pt 0.445	model	[1] Karakaya 1987	Table 1, p. 1, row 5 report

Other properties

Phase equilibrium (43)

Phase equilibrium, Ag–Pt system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	1173.15	(Ag) + (Pt) (Ag): Ag 0.656, Pt 0.344; (Pt): Ag 0.157, Pt 0.843	model	[1] Karakaya 1987	Table 6, p. 7, row 13 report
Phase composition	1223.15	(Ag) + (Pt) (Ag): Ag 0.646, Pt 0.354; (Pt): Ag 0.167, Pt 0.833	model	[1] Karakaya 1987	Table 6, p. 7, row 12 report
Phase composition	1235.05	L + (Ag) L: Ag 1, Pt 0; (Ag): Ag 1, Pt 0	model	[1] Karakaya 1987	Table 6, p. 7, row 1 report
Phase composition	1263.15	liquid + L liquid: Ag 0.98, Pt 0.02; L: Ag 0.98, Pt 0.02	experimental	[1] Karakaya 1987 cites Heycock 1907	Table 2, p. 3, row 2 report
Phase composition	1263.15	liquid + L liquid: Ag 0.986, Pt 0.014; L: Ag 0.986, Pt 0.014	model	[1] Karakaya 1987	Table 2, p. 3, row 1 report
Phase composition	1273.15	(Ag) + (Pt) (Ag): Ag 0.635, Pt 0.365; (Pt): Ag 0.178, Pt 0.822	model	[1] Karakaya 1987	Table 6, p. 7, row 11 report
Phase composition	1273.15	L + (Ag) L: Ag 0.98, Pt 0.02; (Ag): Ag 0.952, Pt 0.048	model	[1] Karakaya 1987	Table 6, p. 7, row 2 report
Phase composition	1318.15	liquid + L liquid: Ag 0.944, Pt 0.056; L: Ag 0.944, Pt 0.056	model	[1] Karakaya 1987	Table 2, p. 3, row 3 report
Phase composition	1318.15	liquid + L liquid: Ag 0.942, Pt 0.058; L: Ag 0.942, Pt 0.058	experimental	[1] Karakaya 1987 cites ref. 07Doe	Table 2, p. 3, row 4 report
Phase composition	1323.15	(Ag) + (Pt) (Ag): Ag 0.625, Pt 0.375; (Pt): Ag 0.189, Pt 0.811	model	[1] Karakaya 1987	Table 6, p. 7, row 10 report
Phase composition	1323.15	L + (Ag) L: Ag 0.94, Pt 0.06; (Ag): Ag 0.885, Pt 0.115	model	[1] Karakaya 1987	Table 6, p. 7, row 3 report
Phase composition	1373.15	(Ag) + (Pt) (Ag): Ag 0.614, Pt 0.386; (Pt): Ag 0.2, Pt 0.8	model	[1] Karakaya 1987	Table 6, p. 7, row 9 report
Phase composition	1373.15	L + (Ag) L: Ag 0.888, Pt 0.112; (Ag): Ag 0.806, Pt 0.194	model	[1] Karakaya 1987	Table 6, p. 7, row 4 report
Phase composition	1393.15	liquid + L liquid: Ag 0.867, Pt 0.133; L: Ag 0.867, Pt 0.133	model	[1] Karakaya 1987	Table 2, p. 3, row 5 report
Phase composition	1393.15	liquid + L liquid: Ag 0.878, Pt 0.122; L: Ag 0.878, Pt 0.122	experimental	[1] Karakaya 1987 cites ref. 07Doe	Table 2, p. 3, row 6 report
Phase composition	1423.15	(Ag) + (Pt) (Ag): Ag 0.603, Pt 0.397; (Pt): Ag 0.212, Pt 0.788	model	[1] Karakaya 1987	Table 6, p. 7, row 8 report
Phase composition	1423.15	L + (Ag) L: Ag 0.833, Pt 0.167; (Ag): Ag 0.706, Pt 0.294	model	[1] Karakaya 1987	Table 6, p. 7, row 5 report
Phase composition	1454.15	liquid + L liquid: Ag 0.803, Pt 0.197; L: Ag 0.803, Pt 0.197	model	[1] Karakaya 1987	Table 2, p. 3, row 7 report
Phase composition	1454.15	liquid + L liquid: Ag 0.808, Pt 0.192; L: Ag 0.808, Pt 0.192	experimental	[1] Karakaya 1987 cites ref. 07Doe	Table 2, p. 3, row 8 report
Phase composition	1459.15	(Ag) + (Pt) (Ag): Ag 0.594, Pt 0.406; (Pt): Ag 0.221, Pt 0.779	model	[1] Karakaya 1987	Table 6, p. 7, row 7 report
Phase composition	1459.15	L + (Ag) L: Ag 0.799, Pt 0.201; (Ag): Ag 0.594, Pt 0.406	model	[1] Karakaya 1987	Table 6, p. 7, row 6 report
Phase composition	1459.15	L + (Pt) L: Ag 0.799, Pt 0.201; (Pt): Ag 0.221, Pt 0.779	model	[1] Karakaya 1987	Table 6, p. 7, row 14 report
Phase composition	1473.15	L + (Pt) L: Ag 0.793, Pt 0.207; (Pt): Ag 0.208, Pt 0.792	model	[1] Karakaya 1987	Table 6, p. 7, row 15 report
Phase composition	1523.15	L + (Pt) L: Ag 0.772, Pt 0.228; (Pt): Ag 0.178, Pt 0.822	model	[1] Karakaya 1987	Table 6, p. 7, row 16 report
Phase composition	1573.15	L + (Pt) L: Ag 0.748, Pt 0.252; (Pt): Ag 0.159, Pt 0.841	model	[1] Karakaya 1987	Table 6, p. 7, row 17 report
Phase composition	1623.15	L + (Pt) L: Ag 0.721, Pt 0.279; (Pt): Ag 0.145, Pt 0.855	model	[1] Karakaya 1987	Table 6, p. 7, row 18 report
Phase composition	1673.15	L + (Pt) L: Ag 0.69, Pt 0.31; (Pt): Ag 0.132, Pt 0.868	model	[1] Karakaya 1987	Table 6, p. 7, row 19 report
Phase composition	1723.15	L + (Pt) L: Ag 0.652, Pt 0.348; (Pt): Ag 0.122, Pt 0.878	model	[1] Karakaya 1987	Table 6, p. 7, row 20 report
Phase composition	1736.15	liquid + L liquid: Ag 0.64, Pt 0.36; L: Ag 0.64, Pt 0.36	model	[1] Karakaya 1987	Table 2, p. 3, row 9 report
Phase composition	1736.15	liquid + L liquid: Ag 0.643, Pt 0.357; L: Ag 0.643, Pt 0.357	experimental	[1] Karakaya 1987 cites ref. 07Doe	Table 2, p. 3, row 10 report
Phase composition	1773.15	L + (Pt) L: Ag 0.601, Pt 0.399; (Pt): Ag 0.112, Pt 0.888	model	[1] Karakaya 1987	Table 6, p. 7, row 21 report
Phase composition	1808.15	liquid + L liquid: Ag 0.545, Pt 0.455; L: Ag 0.545, Pt 0.455	model	[1] Karakaya 1987	Table 2, p. 3, row 11 report
Phase composition	1808.15	liquid + L liquid: Ag 0.545, Pt 0.455; L: Ag 0.545, Pt 0.455	experimental	[1] Karakaya 1987 cites ref. 07Doe	Table 2, p. 3, row 12 report
Phase composition	1823.15	L + (Pt) L: Ag 0.508, Pt 0.492; (Pt): Ag 0.102, Pt 0.898	model	[1] Karakaya 1987	Table 6, p. 7, row 22 report
Phase composition	1832.15	liquid + L liquid: Ag 0.435, Pt 0.565; L: Ag 0.435, Pt 0.565	experimental	[1] Karakaya 1987 cites ref. 07Doe	Table 2, p. 3, row 14 report
Phase composition	1832.15	liquid + L liquid: Ag 0.475, Pt 0.525; L: Ag 0.475, Pt 0.525	model	[1] Karakaya 1987	Table 2, p. 3, row 13 report
Phase composition	1861.15	liquid + L liquid: Ag 0.31, Pt 0.69; L: Ag 0.31, Pt 0.69	experimental	[1] Karakaya 1987 cites ref. 07Doe	Table 2, p. 3, row 16 report
Phase composition	1861.15	liquid + L liquid: Ag 0.306, Pt 0.694; L: Ag 0.306, Pt 0.694	model	[1] Karakaya 1987	Table 2, p. 3, row 15 report
Phase composition	1873.15	L + (Pt) L: Ag 0.265, Pt 0.735; (Pt): Ag 0.086, Pt 0.914	model	[1] Karakaya 1987	Table 6, p. 7, row 23 report
Phase composition	1923.15	L + (Pt) L: Ag 0.157, Pt 0.843; (Pt): Ag 0.062, Pt 0.938	model	[1] Karakaya 1987	Table 6, p. 7, row 24 report
Phase composition	1973.15	L + (Pt) L: Ag 0.083, Pt 0.917; (Pt): Ag 0.036, Pt 0.964	model	[1] Karakaya 1987	Table 6, p. 7, row 25 report
Phase composition	2023.15	L + (Pt) L: Ag 0.019, Pt 0.981; (Pt): Ag 0.008, Pt 0.992	model	[1] Karakaya 1987	Table 6, p. 7, row 26 report
Phase composition	2042.15	L + (Pt) L: Ag 0, Pt 1; (Pt): Ag 0, Pt 1	model	[1] Karakaya 1987	Table 6, p. 7, row 27 report

Crystal structure (20)

Crystal structure, Ag–Pt system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	4.067 Å		(Ag) (Ag): Ag 0.946, Pt 0.054	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 3 report
Lattice a	3.895 Å		α″ α″: Ag 0.75, Pt 0.25	experimental	[1] Karakaya 1987 cites ref. 2	Table 4, p. 4, row 11 report
Lattice a	3.89 Å	298.15	γ	experimental	[1] Karakaya 1987 cites ref. 2	Table 4, p. 4, row 12 report
Lattice a	4.061 Å	1023.15	(Ag) (Ag): Ag 0.93, Pt 0.07	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 4 report
Lattice a	4.068 Å	1073.15	(Ag) (Ag): Ag 0.972, Pt 0.028	experimental	[1] Karakaya 1987 cites Novikova 1957	Table 4, p. 4, row 2 report
Lattice a	3.91 Å	1093.15	α′ α′: Ag 0.75, Pt 0.25	experimental	[1] Karakaya 1987 cites ref. 2	Table 4, p. 4, row 10 report
Lattice a	3.932 Å	1403.15	(Pt) (Pt): Ag 0.2, Pt 0.8	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 5 report
Lattice a	3.921 Å	1403.15	(Pt) (Pt): Ag 0.08, Pt 0.92	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 7 report
Lattice a	3.917 Å	1403.15	(Pt) (Pt): Ag 0.06, Pt 0.94	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 8 report
Lattice a	3.928 Å	1403.15	(Pt) (Pt): Ag 0.14, Pt 0.86	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 6 report
lattice unspecified axis	3.89 Å	298.15	γ	experimental	[1] Karakaya 1987 cites ref. 2	Table 4, p. 4, row 12 report
lattice unspecified axis	4.061 Å	1023.15	(Ag) (Ag): Ag 0.93, Pt 0.07	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 4 report
lattice unspecified axis	4.068 Å	1073.15	(Ag) (Ag): Ag 0.972, Pt 0.028	experimental	[1] Karakaya 1987 cites Novikova 1957	Table 4, p. 4, row 2 report
lattice unspecified axis	3.895 Å	1073.15	α″ α″: Ag 0.75, Pt 0.25	experimental	[1] Karakaya 1987 cites ref. 2	Table 4, p. 4, row 11 report
lattice unspecified axis	3.91 Å	1093.15	α′ α′: Ag 0.75, Pt 0.25	experimental	[1] Karakaya 1987 cites ref. 2	Table 4, p. 4, row 10 report
lattice unspecified axis	4.067 Å	1173.15	(Ag) (Ag): Ag 0.946, Pt 0.054	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 3 report
lattice unspecified axis	3.932 Å	1403.15	(Pt) (Pt): Ag 0.2, Pt 0.8	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 5 report
lattice unspecified axis	3.921 Å	1403.15	(Pt) (Pt): Ag 0.08, Pt 0.92	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 7 report
lattice unspecified axis	3.917 Å	1403.15	(Pt) (Pt): Ag 0.06, Pt 0.94	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 8 report
lattice unspecified axis	3.928 Å	1403.15	(Pt) (Pt): Ag 0.14, Pt 0.86	experimental	[1] Karakaya 1987 cites ref. 43Sch	Table 4, p. 4, row 6 report

Sources

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

I. Karakaya, W. T. Thompson, The Ag-Pt (Silver-Platinum) system, Bulletin of Alloy Phase Diagrams 8, 334-340 (1987). doi:10.1007/bf02869269

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}
}