Os–Si system

13 accepted literature values from 1 paper(s) (experimental 8, model 5); 1 calculated phase diagram(s). 5 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 (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	8
model	5

Accepted values by property group
Property group	Values
invariant reaction	12
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
OsSi-01Liu-LB.tdb	Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001). doi:10.1016/S0925-8388(01)00931-8	`661081800c525b84650d894af942f1a36a9a98bddd7f6dc44ddd1d32320c9649`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
OsSi-01Liu-LB.tdb	2013.01	LIQUID (x(Si) 0.4572) + MSI_B20 (x(Si) 0.5) + OS2SI3 (x(Si) 0.6)
OsSi-01Liu-LB.tdb	2013.01	LIQUID (x(Si) 0.45739) + MSI_B20 (x(Si) 0.5) + OS2SI3 (x(Si) 0.6)
OsSi-01Liu-LB.tdb	2013.01	LIQUID (x(Si) 0.45698) + MSI_B20 (x(Si) 0.5) + OS2SI3 (x(Si) 0.6)
OsSi-01Liu-LB.tdb	1990.3	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.41952) + MSI_B20 (x(Si) 0.5)
OsSi-01Liu-LB.tdb	1990.3	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.41947) + MSI_B20 (x(Si) 0.5)
OsSi-01Liu-LB.tdb	1990.3	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.41939) + MSI_B20 (x(Si) 0.5)
OsSi-01Liu-LB.tdb	1990.3	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0.41938) + MSI_B20 (x(Si) 0.5)
OsSi-01Liu-LB.tdb	1922.11	OS2SI3 (x(Si) 0.6) + OSSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.78483)
OsSi-01Liu-LB.tdb	1922.11	OS2SI3 (x(Si) 0.6) + OSSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.7846)
OsSi-01Liu-LB.tdb	1616.01	OSSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.9088) + DIAMOND_A4 (x(Si) 1)
OsSi-01Liu-LB.tdb	1616.01	OSSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.90893) + DIAMOND_A4 (x(Si) 1)
OsSi-01Liu-LB.tdb	1616.01	OSSI2 (x(Si) 0.66667) + LIQUID (x(Si) 0.909) + DIAMOND_A4 (x(Si) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Os–Si system (12)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2113	congruent melting: liquid = Os2Si3	liquid: Os 0.4, Si 0.6; Os2Si3: Os 0.4, Si 0.6	experimental	[1] Liu 2001 cites Schellenberg 1988 doi	Table 4, p. 8, row 1 report
2102	congruent melting: liquid = Os2Si3	liquid: Os 0.4, Si 0.6; Os2Si3: Os 0.4, Si 0.6	model	[1] Liu 2001	Table 4, p. 8, row 2 report
2011	liquid + Os2Si3 = OsSi	liquid: Si 0.46; Os2Si3: Si 0.6; OsSi: Si 0.5	model	[1] Liu 2001	Table 4, p. 8, row 10 report
2003	liquid + Os2Si3 = OsSi	Os2Si3: Si 0.6; OsSi: Si 0.5	experimental	[1] Liu 2001 cites Schellenberg 1988 doi	Table 4, p. 8, row 9 report
1993	liquid = OsSi + (Os)	liquid: Si 0.45; OsSi: Si 0.5; (Os): Si 0	experimental	[1] Liu 2001 cites Schellenberg 1988 doi	Table 4, p. 8, row 11 report
1988	liquid = OsSi + (Os)	liquid: Si 0.42; OsSi: Si 0.5; (Os): Si 0	model	[1] Liu 2001	Table 4, p. 8, row 12 report
1921	liquid + Os2Si3 = OsSi2	liquid: Si 0.78; Os2Si3: Si 0.6; OsSi2: Si 0.667	model	[1] Liu 2001	Table 4, p. 8, row 4 report
1913	liquid + Os2Si3 = OsSi2	liquid: Si 0.72; Os2Si3: Si 0.6; OsSi2: Si 0.667	experimental	[1] Liu 2001 cites Schellenberg 1988 doi	Table 4, p. 8, row 3 report
1633	liquid = OsSi2 + Diamond	OsSi2: Os 0.333333, Si 0.666667	experimental	[1] Liu 2001 cites Finnie 1962 doi	Table 4, p. 8, row 7 report
1633	liquid = OsSi2 + Diamond	liquid: Si 0.88; OsSi2: Si 0.667; Diamond: Si 1	experimental	[1] Liu 2001 cites Schellenberg 1988 doi	Table 4, p. 8, row 5 report
1630	liquid = OsSi2 + Diamond	liquid: Si 0.9; OsSi2: Os 0.333333, Si 0.666667	experimental	[1] Liu 2001 cites Mason 1983 doi	Table 4, p. 8, row 6 report
1615	liquid = OsSi2 + Diamond	liquid: Si 0.9; OsSi2: Si 0.667; Diamond: Si 1	model	[1] Liu 2001	Table 4, p. 8, row 8 report

Other properties

Phase equilibrium (1)

Phase equilibrium, Os–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase assemblage		1730	liquid alloy: Os 0.15, Si 0.85	experimental	[1] Liu 2001 cites Mason 1983 doi	p. 3 report	It was found that the mixture of 15 at.% Os and 85 at.% Si was completely liquid at 1730 K.

Sources

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

Y.Q. Liu, G. Shao, K.P. Homewood, Thermodynamic assessment of the Ru–Si and Os–Si systems, Journal of Alloys and Compounds 320, 72-79 (2001). doi:10.1016/s0925-8388(01)00931-8

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}
}