O–Sr system

24 accepted literature values from 1 paper(s) (experimental 13, model 2, unspecified 9); 0 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 · phases (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	13
model	2
unspecified	9

Accepted values by property group
Property group	Values
phase transition	7
formation	11
heat capacity / entropy / enthalpy	6

Convex hulls: Materials Project DFT hull · OQMD DFT hull

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, O–Sr system (11)
Phase	Value	T (K)	Class	Source	Location
SrO	-643 kJ/mol (basis unstated)	298.15	experimental	[1] Risold 1996 cites ref. 93Ono	Table 3, p. 4, row 3 report
SrO	-604.3 kJ/mol (basis unstated)	298.15	experimental	[1] Risold 1996 cites Mah 1963	Table 3, p. 4, row 2 report
SrO	-595 kJ/mol (basis unstated)	298.15	experimental	[1] Risold 1996 cites ref. 93Ono	Table 3, p. 4, row 4 report
SrO	-592.15 kJ/mol (basis unstated)	298.15	unspecified	[1] Risold 1996	Table 3, p. 4, row 7 report
SrO	-592.15 kJ/mol (basis unstated)	298.15	experimental	[1] Risold 1996 cites ref. 90Cor	Table 3, p. 4, row 1 report
SrO	-592.04 kJ/mol (basis unstated)	298.15	unspecified	[1] Risold 1996 cites Chase 1985	Table 3, p. 4, row 5 report
SrO	-591.01 kJ/mol (basis unstated)	298.15	unspecified	[1] Risold 1996 cites ref. 94	Table 3, p. 4, row 6 report
SrO2	-636 kJ/mol (basis unstated)	298.15	unspecified	[1] Risold 1996	Table 4, p. 4, row 4 report
SrO2	-635 kJ/mol (basis unstated)	298.15	experimental	[1] Risold 1996 cites M	Table 4, p. 4, row 1 report
SrO2	-633 kJ/mol (basis unstated)	298.15	unspecified	[1] Risold 1996 cites ref. 94	Table 4, p. 4, row 3 report
SrO2	-631 kJ/mol (basis unstated)	298.15	experimental	[1] Risold 1996 cites Vedeneev	Table 4, p. 4, row 2 report

Other properties

Phase transition (7)

Phase transition, O–Sr system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	2703 K	2703	congruent melting: [26Sch] alloy: Sr 0.5	experimental	[1] Risold 1996 cites ref. 26Sch	Table 1, p. 4, row 1 report
Phase transition	2805 K	2805	congruent melting: [85Irg] alloy: Sr 0.5	experimental	[1] Risold 1996 cites Properties 1985	Table 1, p. 4, row 2 report
Phase transition	2805 K	2805	congruent melting: [94SGT] alloy: Sr 0.5	model	[1] Risold 1996 cites ref. 94	Table 1, p. 4, row 6 report
Phase transition	2870 K	2870	congruent melting: This work alloy: Sr 0.5	unspecified	[1] Risold 1996	Table 1, p. 4, row 7 report
Phase transition	2872 K	2872	congruent melting: [69Nog] alloy: Sr 0.5	experimental	[1] Risold 1996 cites Noguchi 1969	Table 1, p. 4, row 3 report
Phase transition	2938 K	2938	congruent melting: [65Foe] alloy: Sr 0.5	experimental	[1] Risold 1996 cites Foex 1965 doi	Table 1, p. 4, row 4 report
Phase transition	2938 K	2938	congruent melting: [85Cha] alloy: Sr 0.5	model	[1] Risold 1996 cites Chase 1985	Table 1, p. 4, row 5 report

Heat capacity / entropy / enthalpy (6)

Heat capacity / entropy / enthalpy, O–Sr system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy printed: S^298	55.56 J/mol (basis unstated)/K	298.15	SrO alloy: Sr 0.5	unspecified	[1] Risold 1996 cites ref. 94	Table 2, p. 4, row 5 report
Entropy printed: S^298	53.63 J/mol (basis unstated)/K	298.15	SrO alloy: Sr 0.5	experimental	[1] Risold 1996 cites Cordfunke doi	Table 2, p. 4, row 3 report
Entropy printed: S^298	54.4 J/mol (basis unstated)/K	298.15	SrO alloy: Sr 0.5	experimental	[1] Risold 1996 cites Anderson 1935 doi	Table 2, p. 4, row 1 report
Entropy printed: S^298	53.58 J/mol (basis unstated)/K	298.15	SrO alloy: Sr 0.5	unspecified	[1] Risold 1996	Table 2, p. 4, row 6 report
Entropy printed: S^298	55.52 J/mol (basis unstated)/K	298.15	SrO alloy: Sr 0.5	unspecified	[1] Risold 1996 cites Chase 1985	Table 2, p. 4, row 4 report
Entropy printed: S^298	55.52 J/mol (basis unstated)/K	298.15	SrO alloy: Sr 0.5	experimental	[1] Risold 1996 cites Gmelin 1969 doi	Table 2, p. 4, row 2 report

Sources

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

Daniel Risold, Bengt Hallstedt, Ludwig J. Gauckler, The strontium-oxygen system, Calphad 20, 353-361 (1996). doi:10.1016/s0364-5916(96)00037-5

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-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); 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); 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. 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_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}
}