H–Sm system

7 accepted literature values from 1 paper(s) (experimental 2, model 5); 0 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · phases (9) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	2
model	5

Accepted values by property group
Property group	Values
invariant reaction	7

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the H–Sm system (7)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1493	peritectic: Liquid + H2 -> SmH2-x	L: H 0.34; H2: H 0.994; SmH2-x: H 0.627	model	[1] Zinkevich 2002	Table 8, p. 15, row 7 report
1389	peritectic: Liquid + SmH2-x -> (γ-Sm)	L: H 0.262; SmH2-x: H 0.623; (γ-Sm): H 0.304	model	[1] Zinkevich 2002	Table 8, p. 15, row 6 report
1224	peritectoid: (γ-Sm) + SmH2-x -> (β-Sm)	(γ-Sm): H 0.274; SmH2-x: H 0.622; (β-Sm): H 0.275	model	[1] Zinkevich 2002	Table 8, p. 15, row 5 report
718	eutectoid: (β-Sm) -> (α-Sm) + SmH2-x	(β-Sm): H 0.079; (α-Sm): H 0.062; SmH2-x: H 0.628	model	[1] Zinkevich 2002	Table 8, p. 15, row 2 report
703	eutectoid: (β-Sm) -> (α-Sm) + SmH2-x	(β-Sm): H 0.1; (α-Sm): H 0.08; SmH2-x: H 0.666667	experimental	[1] Zinkevich 2002 cites Beadry 1978	Table 8, p. 15, row 1 report
587	peritectoid: SmH2±x + H2 -> SmH3-y	SmH2±x: H 0.706; H2: H 1; SmH3-y: H 0.74	experimental	[1] Zinkevich 2002 cites Mintz 1974 doi	Table 8, p. 15, row 3 report
580	peritectoid: SmH2±x + H2 -> SmH3-y	SmH2±x: H 0.716; H2: H 1; SmH3-y: H 0.731	model	[1] Zinkevich 2002	Table 8, p. 15, row 4 report

Sources

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

M. Zinkevich, N. Mattern, A. Handstein, O. Gutfleisch, Thermodynamics of Fe–Sm, Fe–H, and H–Sm systems and its application to the hydrogen–disproportionation–desorption–recombination (HDDR) process for the system Fe17Sm2–H2, Journal of Alloys and Compounds 339, 118-139 (2002). doi:10.1016/s0925-8388(01)01990-9

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}
}