Cr–Pt system

25 accepted literature values from 2 paper(s) (experimental 17, model 7, unspecified 1); 3 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 (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	17
model	7
unspecified	1

Accepted values by property group
Property group	Values
invariant reaction	13
phase transition	11
phase equilibrium	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
CrPt-01Oik.tdb	K. Oikawa, G.W. Qin, T. Ikeshoji, O. Kitakami, Y. Shimada, K. Ishida, K. Fukamichi, J. Magn. Magn. Mater., 236, 220-33(2001). doi:10.1016/S0304-8853(00)00520-5	`e67e8c07062774a02e8a14ba0e210e64a7c8c0af033bb5f77fa90997391970da`	viewer · TDB · JSON
CrPt-09Pre.tdb	J. Preussner, S. Prins, R. Voelkl, Z.-K. Liu, U. Glatzel, Mater. Sci. Eng. A, 510-511, 322-27(2009). doi:10.1016/j.msea.2008.10.059	`812667dfc13e00cf799010d354ae3852315ceb49ab355b9893bf0e80fd897b80`	viewer · TDB · JSON
CrPt-98Spe-LB.tdb	P.J. Spencer, unpublished, 1998.	`82886ea74acc67cb66c2d3759b268a45d685cdca93e526a139cfedfd875f1c03`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CrPt-01Oik.tdb	1838.2	BCC_A2 (x(Pt) 0.05832) + LIQUID (x(Pt) 0.14166) + CR3PT_A15 (x(Pt) 0.17133)
CrPt-01Oik.tdb	1821.34	CR3PT_A15 (x(Pt) 0.20472) + LIQUID (x(Pt) 0.24906) + FCC_A1 (x(Pt) 0.28028)
CrPt-09Pre.tdb	1889.24	BCC_A2 (x(Pt) 0.06917) + LIQUID (x(Pt) 0.13554) + CR3PT_A15 (x(Pt) 0.16482)
CrPt-09Pre.tdb	1831.73	CR3PT_A15 (x(Pt) 0.19984) + LIQUID (x(Pt) 0.26826) + FCC_A1 (x(Pt) 0.29987)
CrPt-09Pre.tdb	1542.76	CR3PT_A15 (x(Pt) 0.20775) + FCC_4SL (x(Pt) 0.32946) + FCC_A1 (x(Pt) 0.3296)
CrPt-98Spe-LB.tdb	1844.63	CR3PT_A15 (x(Pt) 0.2) + LIQUID (x(Pt) 0.2487) + FCC_A1 (x(Pt) 0.28087)
CrPt-98Spe-LB.tdb	1842.68	BCC_A2 (x(Pt) 0.0706) + LIQUID (x(Pt) 0.15111) + CR3PT_A15 (x(Pt) 0.2)
CrPt-98Spe-LB.tdb	1842.68	BCC_A2 (x(Pt) 0.07053) + LIQUID (x(Pt) 0.15101) + CR3PT_A15 (x(Pt) 0.2)
CrPt-98Spe-LB.tdb	1044.21	CR3PT_A15 (x(Pt) 0.2) + FCC_A1 (x(Pt) 0.34247) + CRPT3_L12 (x(Pt) 0.37793)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CrPt-01Oik · CALPHAD hull CrPt-98Spe-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cr–Pt system (13)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2058	congruent melting: L ↔ Pt fcc	L: Pt 0.8; Pt fcc: Pt 0.8	experimental	[1] Preußner 2009	Table 3, p. 5, row 1 report
2053	congruent melting: L ↔ Pt fcc		model	[1] Preußner 2009	Table 3, p. 5, row 2 report
1903	congruent melting: L ↔ A15 Cr3Pt	L: Pt 0.18; A15 Cr3Pt: Pt 0.18	model	[1] Preußner 2009	Table 3, p. 5, row 4 report
1887	eutectic: L ↔ Cr bcc + A15 Cr3Pt	A15: Pt 0.17	model	[1] Preußner 2009	Table 3, p. 5, row 8 report
1873	congruent melting: L ↔ A15 Cr3Pt	L: Pt 0.18; A15 Cr3Pt: Pt 0.18	experimental	[1] Preußner 2009	Table 3, p. 5, row 3 report
1830	eutectic: L ↔ A15 Cr3Pt + Pt fcc	A15: Pt 0.2	model	[1] Preußner 2009	Table 3, p. 5, row 6 report
1803	eutectic: L ↔ A15 Cr3Pt + Pt fcc	L: Pt 0.24; A15: Pt 0.2; fcc: Pt 0.29	experimental	[1] Preußner 2009	Table 3, p. 5, row 5 report
1773	eutectic: L ↔ Cr bcc + A15 Cr3Pt	L: Pt 0.13; bcc: Pt 0.1; A15: Pt 0.17	experimental	[1] Preußner 2009	Table 3, p. 5, row 7 report
1542	order-disorder: Pt fcc ↔ L12 Cr3Pt + A15	A15: Cr 0.75, Pt 0.25	model	[1] Preußner 2009	Table 3, p. 5, row 12 report
1440	order-disorder: Pt fcc ↔ L10 CrPt		model	[1] Preußner 2009	Table 3, p. 5, row 9 report
1425	order-disorder: Pt fcc ↔ L12 CrPt3		model	[1] Preußner 2009	Table 3, p. 5, row 11 report
1403	order-disorder: Pt fcc ↔ L12 CrPt3	Pt fcc: Pt 0.67; L12 CrPt3: Pt 0.67	experimental	[1] Preußner 2009	Table 3, p. 5, row 10 report
1243.15	eutectoid: (Pt) -> Cr3Pt + CrPt3	(Pt): Pt 0.34; Cr3Pt: Pt 0.23	unspecified	[2] WATSON 2006 cites ref. 3	Table 1, p. 3, row 9 report

Other properties

Phase transition (11)

Phase transition, Cr–Pt system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	503.15 K	503.15	magnetic: T_curie alloy: Cr 0.25, Pt 0.75	experimental	[1] Preußner 2009	Table 2, p. 4, row 8 report
Phase transition	513.15 K	513.15	magnetic	experimental	[1] Preußner 2009	p. 4 report	The DSC curves of Cr0.25 Pt0.75 is given in Fig. 5a. The hump at ∼240 ◦ C corresponds to the Curie temperature, the peak at ∼1090 ◦ C to the transformation from L12 to fcc.
Phase transition	516.15 K	516.15	magnetic: Tcurie alloy: Cr 0.25, Pt 0.75	experimental	[1] Preußner 2009	Table 2, p. 4, row 2 report
Phase transition	1358.15 K	1358.15	polymorphic: fcc-L1₂ alloy: Cr 0.25, Pt 0.75	experimental	[1] Preußner 2009	Table 2, p. 4, row 7 report
Phase transition	1370.15 K	1370.15	polymorphic: fcc-L12 alloy: Cr 0.25, Pt 0.75	experimental	[1] Preußner 2009	Table 2, p. 4, row 1 report
Phase transition	1395.15 K	1395.15	polymorphic: fcc-L10? alloy: Cr 0.5, Pt 0.5	experimental	[1] Preußner 2009	Table 2, p. 4, row 3 report
Phase transition	1506.15 K	1506.15	polymorphic: fcc-L1₂ alloy: Cr 0.57, Pt 0.43	experimental	[1] Preußner 2009	Table 2, p. 4, row 11 report
Phase transition	1509.15 K	1509.15	polymorphic: fcc-L1₂ alloy: Cr 0.63, Pt 0.37	experimental	[1] Preußner 2009	Table 2, p. 4, row 12 report
Phase transition	1511.15 K	1511.15	polymorphic: fcc-L12 alloy: Cr 0.63, Pt 0.37	experimental	[1] Preußner 2009	Table 2, p. 4, row 6 report
Phase transition	1521.15 K	1521.15	polymorphic: fcc-L12 alloy: Cr 0.57, Pt 0.43	experimental	[1] Preußner 2009	Table 2, p. 4, row 5 report
Phase transition	1572.15 K	1572.15	polymorphic: fcc-L10? alloy: Cr 0.5, Pt 0.5	experimental	[1] Preußner 2009	Table 2, p. 4, row 4 report

Phase equilibrium (1)

Phase equilibrium, Cr–Pt system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase assemblage		1243.15	CrPt3 L12 + Cr3 Pt A15 + (Pt) fcc alloy: Pt 0.35	experimental	[1] Preußner 2009 cites Waterstrat 1973 doi	p. 5 report	Waterstrat [24] derived a phase diagram from quenched samples. He observed a transition from CrPt3 L12 + Cr3 Pt A15 at lower temperatures to (Pt) fcc at ∼970 ◦ C and 35 at.% Pt (symbol in Fig. 2).

Sources

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

Johannes Preußner, Sara Prins, Rainer Völkl, Zi-Kui Liu, Uwe Glatzel, Determination of phases in the system chromium–platinum (Cr–Pt) and thermodynamic calculations, Materials Science and Engineering: A 510-511, 322-327 (2009). doi:10.1016/j.msea.2008.10.059
A WATSON, L CORNISH, R SUSS, Development of a database for the prediction of phases in Pt-based Superalloys: Cr-Pt-Ru, Rare Metals 25, 597-607 (2006). doi:10.1016/s1001-0521(06)60106-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}
}