Pt–Si system

32 accepted literature values from 1 paper(s) (experimental 19, model 13); 1 calculated phase diagram(s). 7 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 (15) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	19
model	13

Accepted values by property group
Property group	Values
invariant reaction	18
phase transition	14

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
PtSi-08Xu.tdb	L.L. Xu, J. Wang, H.S. Liu, Z.P. Jin, Calphad, 32, 101-5(2008). doi:10.1016/j.calphad.2007.07.010	`10c16b80054347fb0309ef81b7115fd5dd88b1cc8f1ccad340a090d7c1608572`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
PtSi-08Xu.tdb	1292.73	LIQUID (x(Si) 0.39522) + PT6SI5 (x(Si) 0.45455) + PTSI_B31 (x(Si) 0.5)
PtSi-08Xu.tdb	1292.73	LIQUID (x(Si) 0.39521) + PT6SI5 (x(Si) 0.45455) + PTSI_B31 (x(Si) 0.5)
PtSi-08Xu.tdb	1292.73	LIQUID (x(Si) 0.39527) + PT6SI5 (x(Si) 0.45455) + PTSI_B31 (x(Si) 0.5)
PtSi-08Xu.tdb	1282.06	PT2SI_C22 (x(Si) 0.33333) + LIQUID (x(Si) 0.3913) + PT6SI5 (x(Si) 0.45455)
PtSi-08Xu.tdb	1282.06	PT2SI_C22 (x(Si) 0.33333) + LIQUID (x(Si) 0.39135) + PT6SI5 (x(Si) 0.45455)
PtSi-08Xu.tdb	1279.9	LIQUID (x(Si) 0.27465) + PT17SI8_ALPHA (x(Si) 0.32) + PT2SI_C22 (x(Si) 0.33333)
PtSi-08Xu.tdb	1247.18	PTSI_B31 (x(Si) 0.5) + LIQUID (x(Si) 0.65417) + DIAMOND_A4 (x(Si) 1)
PtSi-08Xu.tdb	1247.18	PTSI_B31 (x(Si) 0.5) + LIQUID (x(Si) 0.65422) + DIAMOND_A4 (x(Si) 1)
PtSi-08Xu.tdb	1147.35	LIQUID (x(Si) 0.23503) + PT3SI_D011 (x(Si) 0.25) + PT17SI8_ALPHA (x(Si) 0.32)
PtSi-08Xu.tdb	1141.18	PT3SI_D011 (x(Si) 0.25) + PT5SI2 (x(Si) 0.286) + PT17SI8_ALPHA (x(Si) 0.32)
PtSi-08Xu.tdb	1124.26	FCC_A1 (x(Si) 0.01071) + LIQUID (x(Si) 0.21629) + PT3SI_D011 (x(Si) 0.25)
PtSi-08Xu.tdb	1124.26	FCC_A1 (x(Si) 0.01071) + LIQUID (x(Si) 0.21627) + PT3SI_D011 (x(Si) 0.25)
PtSi-08Xu.tdb	1115.4	FCC_A1 (x(Si) 0.01027) + PT25SI7 (x(Si) 0.218) + PT3SI_D011 (x(Si) 0.25)
PtSi-08Xu.tdb	1115.4	FCC_A1 (x(Si) 0.01028) + PT25SI7 (x(Si) 0.218) + PT3SI_D011 (x(Si) 0.25)
PtSi-08Xu.tdb	1042.99	PT5SI2 (x(Si) 0.286) + PT17SI8_BETA (x(Si) 0.32) + PT17SI8_ALPHA (x(Si) 0.32)
PtSi-08Xu.tdb	1042.99	PT17SI8_ALPHA (x(Si) 0.32) + PT17SI8_BETA (x(Si) 0.32) + PT2SI_C22 (x(Si) 0.33333)
PtSi-08Xu.tdb	1017.54	PT2SI_L2B (x(Si) 0.33333) + PT2SI_C22 (x(Si) 0.33333) + PT6SI5 (x(Si) 0.45455)
PtSi-08Xu.tdb	1017.54	PT17SI8_BETA (x(Si) 0.32) + PT2SI_C22 (x(Si) 0.33333) + PT2SI_L2B (x(Si) 0.33333)
PtSi-08Xu.tdb	715.5	PT3SI_D011 (x(Si) 0.25) + PT3SI_ALPHA (x(Si) 0.25) + PT5SI2 (x(Si) 0.286)
PtSi-08Xu.tdb	715.5	PT25SI7 (x(Si) 0.218) + PT3SI_ALPHA (x(Si) 0.25) + PT3SI_D011 (x(Si) 0.25)
PtSi-08Xu.tdb	323.56	PT17SI8_BETA (x(Si) 0.32) + PT2SI_L2B (x(Si) 0.33333) + PT6SI5 (x(Si) 0.45455)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Pt–Si system (18)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1296	peritectic: L + PtSi -> Pt6Si5	L: Si 0.4; PtSi: Si 0.5; Pt6Si5: Si 0.454545	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 7 report
1292	peritectic: L + PtSi -> Pt6Si5	L: Si 0.395; PtSi: Si 0.5; Pt6Si5: Si 0.454545	model	[1] Xu 2008	Table 2, p. 4, row 8 report
1281	eutectic: L -> Pt6Si5 + β-Pt2Si	L: Si 0.391; Pt6Si5: Si 0.454545; β-Pt2Si: Si 0.333333	model	[1] Xu 2008	Table 2, p. 4, row 10 report
1277	peritectic: L + β-Pt2Si -> β-Pt17Si8	L: Si 0.273; β-Pt2Si: Si 0.333333; β-Pt17Si8: Si 0.32	model	[1] Xu 2008	Table 2, p. 4, row 18 report
1276	peritectic: L + β-Pt2Si -> β-Pt17Si8	L: Si 0.286; β-Pt2Si: Si 0.333333; β-Pt17Si8: Si 0.32	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 17 report
1268	eutectic: L -> Pt6Si5 + β-Pt2Si	L: Si 0.385; Pt6Si5: Si 0.454545; β-Pt2Si: Si 0.333333	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 9 report
1252	eutectic: L -> Diamond(Si) + PtSi	L: Si 0.67; Diamond(Si): Si 1; PtSi: Si 0.5	experimental	[1] Xu 2008 cites Voronov 1936	Table 2, p. 4, row 1 report
1251	eutectic: L -> Diamond(Si) + PtSi	L: Si 0.67; Diamond(Si): Si 1; PtSi: Si 0.5	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 2 report
1247	eutectic: L -> Diamond(Si) + PtSi	L: Si 0.654; Diamond(Si): Si 1; PtSi: Si 0.5	model	[1] Xu 2008	Table 2, p. 4, row 3 report
1149	peritectic: L + β-Pt17Si8 -> β-Pt3Si	L: Si 0.238; β-Pt17Si8: Si 0.32; β-Pt3Si: Si 0.25	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 21 report
1147	peritectic: L + β-Pt17Si8 -> β-Pt3Si	L: Si 0.235; β-Pt17Si8: Si 0.32; β-Pt3Si: Si 0.25	model	[1] Xu 2008	Table 2, p. 4, row 22 report
1143	eutectoid: β-Pt17Si8 + β-Pt3Si -> Pt5Si2	β-Pt17Si8: Si 0.32; β-Pt3Si: Si 0.25; Pt5Si2: Si 0.285714	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 29 report
1143	eutectoid: β-Pt17Si8 + β-Pt3Si -> Pt5Si2	β-Pt17Si8: Si 0.32; β-Pt3Si: Si 0.25; Pt5Si2: Si 0.285714	model	[1] Xu 2008	Table 2, p. 4, row 30 report
1124	eutectic: L -> Fcc(Pt) + β-Pt3Si	L: Si 0.216; β-Pt3Si: Si 0.25	model	[1] Xu 2008	Table 2, p. 4, row 28 report
1120	eutectic: L -> Fcc(Pt) + β-Pt3Si	L: Si 0.23; β-Pt3Si: Si 0.25	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 27 report
1115	eutectoid: β-Pt3Si + Fcc(Pt) -> Pt25Si7	β-Pt3Si: Si 0.25; Pt25Si7: Si 0.21875	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 31 report
1115	eutectoid: β-Pt3Si + Fcc(Pt) -> Pt25Si7	β-Pt3Si: Si 0.25; Pt25Si7: Si 0.21875	model	[1] Xu 2008	Table 2, p. 4, row 32 report
1103	eutectic: L -> Fcc(Pt) + β-Pt3Si	L: Si 0.23; β-Pt3Si: Si 0.25	experimental	[1] Xu 2008 cites Voronov 1936	Table 2, p. 4, row 26 report

Other properties

Phase transition (14)

Phase transition, Pt–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	633 K	633	polymorphic: β-Pt3Si -> α-Pt3Si β-Pt3Si: Si 0.25; α-Pt3Si: Si 0.25	experimental	[1] Xu 2008 cites Voronov 1936	Table 2, p. 4, row 23 report
Phase transition	713 K	713	polymorphic: β-Pt3Si -> α-Pt3Si β-Pt3Si: Si 0.25; α-Pt3Si: Si 0.25	model	[1] Xu 2008	Table 2, p. 4, row 25 report
Phase transition	713 K	713	polymorphic: β-Pt3Si -> α-Pt3Si β-Pt3Si: Si 0.25; α-Pt3Si: Si 0.25	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 24 report
Phase transition	968 K	968	polymorphic: β-Pt2Si -> α-Pt2Si β-Pt2Si: Si 0.333333; α-Pt2Si: Si 0.333333	experimental	[1] Xu 2008 cites Voronov 1936	Table 2, p. 4, row 14 report
Phase transition	1018 K	1018	polymorphic: β-Pt2Si -> α-Pt2Si β-Pt2Si: Si 0.333333; α-Pt2Si: Si 0.333333	model	[1] Xu 2008	Table 2, p. 4, row 16 report
Phase transition	1018 K	1018	polymorphic: β-Pt2Si -> α-Pt2Si β-Pt2Si: Si 0.333333; α-Pt2Si: Si 0.333333	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 15 report
Phase transition	1043 K	1043	polymorphic: β-Pt17Si8 -> α-Pt17Si8 β-Pt17Si8: Si 0.32; α-Pt17Si8: Si 0.32	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 19 report
Phase transition	1043 K	1043	polymorphic: β-Pt17Si8 -> α-Pt17Si8 β-Pt17Si8: Si 0.32; α-Pt17Si8: Si 0.32	model	[1] Xu 2008	Table 2, p. 4, row 20 report
Phase transition	1373 K	1373	congruent melting: L -> β-Pt2Si L: Si 0.333; β-Pt2Si: Si 0.333333	experimental	[1] Xu 2008 cites Voronov 1936	Table 2, p. 4, row 11 report
Phase transition	1378 K	1378	congruent melting: L -> β-Pt2Si L: Si 0.333; β-Pt2Si: Si 0.333333	model	[1] Xu 2008	Table 2, p. 4, row 13 report
Phase transition	1391 K	1391	congruent melting: L -> β-Pt2Si L: Si 0.333; β-Pt2Si: Si 0.333333	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 12 report
Phase transition	1502 K	1502	congruent melting: L -> PtSi L: Si 0.5; PtSi: Si 0.5	experimental	[1] Xu 2008 cites Voronov 1936	Table 2, p. 4, row 4 report
Phase transition	1505 K	1505	congruent melting: L -> PtSi L: Si 0.5; PtSi: Si 0.5	model	[1] Xu 2008	Table 2, p. 4, row 6 report
Phase transition	1511 K	1511	congruent melting: L -> PtSi L: Si 0.5; PtSi: Si 0.5	experimental	[1] Xu 2008 cites Massara 1993 doi	Table 2, p. 4, row 5 report

Sources

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

L.L. Xu, J. Wang, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Pt–Si binary system, Calphad 32, 101-105 (2008). doi:10.1016/j.calphad.2007.07.010

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}
}