Ge–Pt system

42 accepted literature values from 1 paper(s) (experimental 22, model 14, DFT 6); 1 calculated phase diagram(s). 1 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 (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	22
model	14
DFT	6

Accepted values by property group
Property group	Values
invariant reaction	21
phase transition	3
formation	18

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
GePt-09Wan.tdb	J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu, Z.P. Jin, Calphad, 33, 561-69(2009). doi:10.1016/j.calphad.2009.05.002	`f60778f39f10891123cdffd56e0355225a9a2dec3cf891e294efb69f3815ec9c`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GePt-09Wan.tdb	1222.52	LIQUID (x(Pt) 0.73315) + GEPT3 (x(Pt) 0.77384) + FCC_A1 (x(Pt) 0.94883)
GePt-09Wan.tdb	1151.04	LIQUID (x(Pt) 0.36396) + GE3PT2 (x(Pt) 0.4) + GEPT_B31 (x(Pt) 0.5)
GePt-09Wan.tdb	1151.03	LIQUID (x(Pt) 0.36371) + GE3PT2 (x(Pt) 0.4) + GEPT_B31 (x(Pt) 0.5)
GePt-09Wan.tdb	1151.03	LIQUID (x(Pt) 0.36364) + GE3PT2 (x(Pt) 0.4) + GEPT_B31 (x(Pt) 0.5)
GePt-09Wan.tdb	1102.39	LIQUID (x(Pt) 0.30312) + GE2PT_C18 (x(Pt) 0.33333) + GE3PT2 (x(Pt) 0.4)
GePt-09Wan.tdb	1102.39	LIQUID (x(Pt) 0.30318) + GE2PT_C18 (x(Pt) 0.33333) + GE3PT2 (x(Pt) 0.4)
GePt-09Wan.tdb	1102.39	LIQUID (x(Pt) 0.30293) + GE2PT_C18 (x(Pt) 0.33333) + GE3PT2 (x(Pt) 0.4)
GePt-09Wan.tdb	1075.23	GEPT_B31 (x(Pt) 0.5) + GE2PT3 (x(Pt) 0.6) + LIQUID (x(Pt) 0.64364)
GePt-09Wan.tdb	1075.23	GEPT_B31 (x(Pt) 0.5) + GE2PT3 (x(Pt) 0.6) + LIQUID (x(Pt) 0.64352)
GePt-09Wan.tdb	1064.21	LIQUID (x(Pt) 0.65322) + GEPT2_C22 (x(Pt) 0.66667) + GEPT3 (x(Pt) 0.75604)
GePt-09Wan.tdb	1064.18	GE2PT3 (x(Pt) 0.6) + LIQUID (x(Pt) 0.65312) + GEPT2_C22 (x(Pt) 0.66667)
GePt-09Wan.tdb	1052.95	DIAMOND_A4 (x(Pt) 0) + LIQUID (x(Pt) 0.22215) + GE2PT_C18 (x(Pt) 0.33333)
GePt-09Wan.tdb	1052.95	DIAMOND_A4 (x(Pt) 0) + LIQUID (x(Pt) 0.22211) + GE2PT_C18 (x(Pt) 0.33333)
GePt-09Wan.tdb	1052.95	DIAMOND_A4 (x(Pt) 0) + LIQUID (x(Pt) 0.22196) + GE2PT_C18 (x(Pt) 0.33333)
GePt-09Wan.tdb	1052.95	DIAMOND_A4 (x(Pt) 0) + LIQUID (x(Pt) 0.22196) + GE2PT_C18 (x(Pt) 0.33333)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ge–Pt system (21)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1224	peritectic: L + Fcc(Pt) -> GePt3	L: Pt 0.715; GePt3: Pt 0.75	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 22 report
1224	peritectic: L+(Pt) ↔ GePt3		experimental	[1] Wang 2009 cites Oya 1987	p. 2 report	Moreover, according to Oya and Suzuki [14], GePt3 formed via a peritectic reaction, L+(Pt) ↔ GePt3 at 1224 K, with a homogeneity of 22-24 at.% Ge, which was in accordance with the result obtained by Ellner and Predel [15].
1223	peritectic: L + Fcc(Pt) -> GePt3	L: Pt 0.7326; GePt3: Pt 0.75	model	[1] Wang 2009	Table 3, p. 6, row 23 report
1188	peritectic: L + Fcc(Pt) -> GePt3	L: Pt 0.749; GePt3: Pt 0.75	experimental	[1] Wang 2009 cites Diaz 2005 doi	Table 3, p. 6, row 21 report
1173	peritectic: L + GePt -> Ge3Pt2	L: Pt 0.371; GePt: Pt 0.5; Ge3Pt2: Pt 0.4	experimental	[1] Wang 2009 cites Diaz 2005 doi	Table 3, p. 6, row 7 report
1152	peritectic: L + GePt -> Ge3Pt2	L: Pt 0.36; GePt: Pt 0.5; Ge3Pt2: Pt 0.4	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 8 report
1151	peritectic: L + GePt -> Ge3Pt2	L: Pt 0.3633; GePt: Pt 0.5; Ge3Pt2: Pt 0.4	model	[1] Wang 2009	Table 3, p. 6, row 9 report
1128	peritectic: L + Ge3Pt2 -> Ge2Pt	L: Pt 0.319; Ge3Pt2: Pt 0.4; Ge2Pt: Pt 0.333333	experimental	[1] Wang 2009 cites Diaz 2005 doi	Table 3, p. 6, row 4 report
1102	peritectic: L + Ge3Pt2 -> Ge2Pt	L: Pt 0.3018; Ge3Pt2: Pt 0.4; Ge2Pt: Pt 0.333333	model	[1] Wang 2009	Table 3, p. 6, row 6 report
1101	peritectic: L + Ge3Pt2 -> Ge2Pt	L: Pt 0.275; Ge3Pt2: Pt 0.4; Ge2Pt: Pt 0.333333	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 5 report
1093	peritectic: L + GePt -> Ge2Pt3	L: Pt 0.631; GePt: Pt 0.5; Ge2Pt3: Pt 0.6	experimental	[1] Wang 2009 cites Diaz 2005 doi	Table 3, p. 6, row 13 report
1080	peritectic: L + GePt -> Ge2Pt3	L: Pt 0.626; GePt: Pt 0.5; Ge2Pt3: Pt 0.6	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 14 report
1076	peritectic: L + GePt -> Ge2Pt3	L: Pt 0.6432; GePt: Pt 0.5; Ge2Pt3: Pt 0.6	model	[1] Wang 2009	Table 3, p. 6, row 15 report
1075	eutectic: L -> (Ge) + Ge2Pt	L: Pt 0.22; (Ge): Pt 0; Ge2Pt: Pt 0.333333	experimental	[1] Wang 2009 cites Diaz 2005 doi	Table 3, p. 6, row 1 report
1068	peritectic: L + GePt3 -> Ge2Pt3	L: Pt 0.65; GePt3: Pt 0.75; Ge2Pt3: Pt 0.6	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 19 report
1065	eutectic: L -> Ge2Pt3 + GePt2	L: Pt 0.646; Ge2Pt3: Pt 0.6; GePt2: Pt 0.666667	experimental	[1] Wang 2009 cites Diaz 2005 doi	Table 3, p. 6, row 16 report
1064	eutectic: L -> Ge2Pt3 + GePt2	L: Pt 0.6525; Ge2Pt3: Pt 0.6; GePt2: Pt 0.666667	model	[1] Wang 2009	Table 3, p. 6, row 18 report
1064	peritectic: L + GePt3 -> Ge2Pt3	L: Pt 0.6525; GePt3: Pt 0.75; Ge2Pt3: Pt 0.6	model	[1] Wang 2009	Table 3, p. 6, row 20 report
1056	eutectic: L -> Ge2Pt3 + GePt2	L: Pt 0.635; Ge2Pt3: Pt 0.6; GePt2: Pt 0.666667	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 17 report
1052	eutectic: L -> (Ge) + Ge2Pt	L: Pt 0.2195; (Ge): Pt 0; Ge2Pt: Pt 0.333333	model	[1] Wang 2009	Table 3, p. 6, row 3 report
1043	eutectic: L -> (Ge) + Ge2Pt	L: Pt 0.22; (Ge): Pt 0; Ge2Pt: Pt 0.333333	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 2 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, Ge–Pt system (18)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Ge2Pt	Ge2Pt	-35.88 kJ/mol-atom	298.15	model	-32.817 (mp-aaaaachj)	-33.15 (oqmd-8191)	[1] Wang 2009	Table 1, p. 3, row 3 report
Ge2Pt		-33.68 kJ/mol-atom	298.15	DFT			[1] Wang 2009	Table 1, p. 3, row 2 report
Ge2Pt	Ge2Pt	-32.4 kJ/mol-atom	298.15	experimental	-32.817 (mp-aaaaachj)	-33.15 (oqmd-8191)	[1] Wang 2009 cites Kleppa 1991 doi	Table 1, p. 3, row 1 report
Ge2Pt3	Ge2Pt3	-42.13 kJ/mol-atom	298.15	model	-41.232 (mp-aaaabgbp)	-42.023 (oqmd-32367)	[1] Wang 2009	Table 1, p. 3, row 6 report
Ge2Pt3		-41.95 kJ/mol-atom	298.15	DFT			[1] Wang 2009	Table 1, p. 3, row 5 report
Ge2Pt3	Ge2Pt3	-41.9 kJ/mol-atom	298.15	experimental	-41.232 (mp-aaaabgbp)	-42.023 (oqmd-32367)	[1] Wang 2009 cites Kleppa 1991 doi	Table 1, p. 3, row 4 report
Ge3Pt2	Ge3Pt2	-42.4 kJ/mol-atom	298.15	experimental	-39.788 (mp-aaabewqt)	-40.315 (oqmd-7905)	[1] Wang 2009 cites Lbibb 1993 doi	Table 1, p. 3, row 10 report
Ge3Pt2	Ge3Pt2	-41.47 kJ/mol-atom	298.15	model	-39.788 (mp-aaabewqt)	-40.315 (oqmd-7905)	[1] Wang 2009	Table 1, p. 3, row 12 report
Ge3Pt2		-40.54 kJ/mol-atom	298.15	DFT			[1] Wang 2009	Table 1, p. 3, row 11 report
GePt		-46.34 kJ/mol-atom	298.15	DFT			[1] Wang 2009	Table 1, p. 3, row 8 report
GePt	GePt	-45 kJ/mol-atom	298.15	experimental	-45.207 (mp-aaabewsu)	-45.839 (oqmd-2258)	[1] Wang 2009 cites Lbibb 1993 doi	Table 1, p. 3, row 7 report
GePt	GePt	-43.9 kJ/mol-atom	298.15	model	-45.207 (mp-aaabewsu)	-45.839 (oqmd-2258)	[1] Wang 2009	Table 1, p. 3, row 9 report
GePt2	GePt2	-38.12 kJ/mol-atom	298.15	model	-33.167 (mp-aaaabdrp)	-39.089 (oqmd-1371420)	[1] Wang 2009	Table 1, p. 3, row 15 report
GePt2	GePt2	-37.3 kJ/mol-atom	298.15	experimental	-33.167 (mp-aaaabdrp)	-39.089 (oqmd-1371420)	[1] Wang 2009 cites Lbibb 1993 doi	Table 1, p. 3, row 13 report
GePt2		-34.49 kJ/mol-atom	298.15	DFT			[1] Wang 2009	Table 1, p. 3, row 14 report
GePt3	GePt3	-32.5 kJ/mol-atom	298.15	experimental	-29.939 (mp-aaaaaydn)	-31.572 (oqmd-2169233)	[1] Wang 2009 cites Lbibb 1993 doi	Table 1, p. 3, row 16 report
GePt3		-31.06 kJ/mol-atom	298.15	DFT			[1] Wang 2009	Table 1, p. 3, row 17 report
GePt3	GePt3	-29.78 kJ/mol-atom	298.15	model	-29.939 (mp-aaaaaydn)	-31.572 (oqmd-2169233)	[1] Wang 2009	Table 1, p. 3, row 18 report

Other properties

Phase transition (3)

Phase transition, Ge–Pt system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1340 K	1340	congruent melting: L -> GePt L: Pt 0.5; GePt: Pt 0.5	model	[1] Wang 2009	Table 3, p. 6, row 12 report
Phase transition	1343 K	1343	congruent melting: L -> GePt L: Pt 0.5; GePt: Pt 0.5	experimental	[1] Wang 2009 cites Kresse 1996 doi	Table 3, p. 6, row 11 report
Phase transition	1348 K	1348	congruent melting: L -> GePt L: Pt 0.5; GePt: Pt 0.5	experimental	[1] Wang 2009 cites Diaz 2005 doi	Table 3, p. 6, row 10 report

Sources

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

J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009). doi:10.1016/j.calphad.2009.05.002

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}
}