Fe–Os system

5 accepted literature values from 1 paper(s) (unspecified 5); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (4) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
unspecified	5

Accepted values by property group
Property group	Values
crystal structure	5

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
FeOs-83Swa.tdb	L.J. Swartzendruber, B. Sundman, Bull. Alloy Phase Diag., 4, 396-99(1983). doi:10.1007/BF02868091	`4eeca48179ed369f9a4097624a39f745f492cc8bf45a142a5221422bbb9bd9e9`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FeOs-83Swa.tdb	2123.39	LIQUID (x(Os) 0.15845) + FCC_A1 (x(Os) 0.25857) + HCP_A3 (x(Os) 0.41272)
FeOs-83Swa.tdb	1852.57	LIQUID (x(Os) 0.01718) + BCC_A2 (x(Os) 0.03645) + FCC_A1 (x(Os) 0.04312)
FeOs-83Swa.tdb	944.18	BCC_A2 (x(Os) 0.02329) + FCC_A1 (x(Os) 0.08116) + HCP_A3 (x(Os) 0.19842)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Other properties

Crystal structure (5)

Crystal structure, Fe–Os system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	2.8664 Å	293.15	α or (αFe) alloy: Os 0	unspecified	[1] Swartzendruber 1983	Table 1, p. 3, row 1 report
Lattice a	27.353 Å	293.15	ε or (Os)	unspecified	[1] Swartzendruber 1983	Table 1, p. 3, row 4 report
Lattice a	3.6468 Å	1189.15	γ or (γFe) alloy: Os 0	unspecified	[1] Swartzendruber 1983	Table 1, p. 3, row 3 report
Lattice a	2.9322 Å	1667.15	δ or (δFe) alloy: Os 0	unspecified	[1] Swartzendruber 1983	Table 1, p. 3, row 2 report
Lattice b	43.191 Å	293.15	ε or (Os)	unspecified	[1] Swartzendruber 1983	Table 1, p. 3, row 4 report

Sources

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

L. J. Swartzendruber, B. Sundman, The Fe−Os (Iron-Osmium) system, Bulletin of Alloy Phase Diagrams 4, 396-399 (1983). doi:10.1007/bf02868091

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}
}