Er–H system

15 accepted literature values from 1 paper(s) (experimental 15); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (5) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	15

Accepted values by property group
Property group	Values
crystal structure	15

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
ErH-13Mas.tdb	A. Mascaro, C. Toffolon-Masclet, C. Raepsaet, J.-M. Joubert, Calphad, 41, 50-59(2013). doi:10.1016/j.calphad.2013.01.004	`f6f27fb09e27c3aae23f3a8b02f33cceabaab15d13f779ca07628fdc65061203`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
ErH-13Mas.tdb	2047.56	LIQUID (x(H) 0.00496) + HCP_A3 (x(H) 0.13032) + GAS (x(H) 1)
ErH-13Mas.tdb	1494.6	HCP_A3 (x(H) 0.39121) + FCC_A1 (x(H) 0.44743) + GAS (x(H) 1)
ErH-13Mas.tdb	654.24	FCC_A1 (x(H) 0.70158) + HCP_A3 (x(H) 0.7495) + GAS (x(H) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Other properties

Crystal structure (15)

Crystal structure, Er–H system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	5.123 Å		β-ErH2 alloy: H 0.666667	experimental	[1] Mascaro 2013 cites Pebler 1962 doi	Table 1, p. 2, row 2 report
Lattice a	3.56 Å	298.15	α_Er α_Er: Er 0.839, H 0.161; αEr: Er 0.839, H 0.161	experimental	[1] Mascaro 2013	Table 3, p. 4, row 1 report
Lattice a	3.566 Å	298.15	α_Er α_Er: Er 0.6, H 0.4; αEr: Er 0.6, H 0.4	experimental	[1] Mascaro 2013	Table 3, p. 4, row 5 report
Lattice a	5.119 Å	298.15	β-ErH2 β-ErH2: Er 0.3, H 0.7	experimental	[1] Mascaro 2013	Table 3, p. 4, row 2 report
Lattice a	5.124 Å	298.15	β-ErH2 β-ErH2: Er 0.349, H 0.651	experimental	[1] Mascaro 2013	Table 3, p. 4, row 7 report
Lattice a	5.122 Å	298.15	β-ErH2 β-ErH2: Er 0.39, H 0.61	experimental	[1] Mascaro 2013	Table 3, p. 4, row 8 report
Lattice a	5.125 Å	298.15	β-ErH2 β-ErH2: Er 0.373, H 0.627	experimental	[1] Mascaro 2013	Table 3, p. 4, row 6 report
Lattice a	6.264 Å	298.15	γ-ErH3 γ-ErH3: Er 0.275, H 0.725	experimental	[1] Mascaro 2013	Table 3, p. 4, row 10 report
Lattice a	6.272 Å	298.15	γ-ErH3 alloy: H 0.75	experimental	[1] Mascaro 2013 cites Pebler 1962 doi	Table 1, p. 2, row 3 report
Lattice a	6.268 Å	298.15	γ-ErH3 γ-ErH3: Er 0.313, H 0.687	experimental	[1] Mascaro 2013	Table 3, p. 4, row 9 report
Lattice c	5.581 Å	298.15	α_Er α_Er: Er 0.839, H 0.161; αEr: Er 0.839, H 0.161	experimental	[1] Mascaro 2013	Table 3, p. 4, row 1 report
Lattice c	5.602 Å	298.15	α_Er α_Er: Er 0.6, H 0.4; αEr: Er 0.6, H 0.4	experimental	[1] Mascaro 2013	Table 3, p. 4, row 5 report
Lattice c	6.52 Å	298.15	γ-ErH3 γ-ErH3: Er 0.275, H 0.725	experimental	[1] Mascaro 2013	Table 3, p. 4, row 10 report
Lattice c	6.526 Å	298.15	γ-ErH3 alloy: H 0.75	experimental	[1] Mascaro 2013 cites Pebler 1962 doi	Table 1, p. 2, row 3 report
Lattice c	6.525 Å	298.15	γ-ErH3 γ-ErH3: Er 0.313, H 0.687	experimental	[1] Mascaro 2013	Table 3, p. 4, row 9 report

Sources

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

Aurore Mascaro, Caroline Toffolon-Masclet, Caroline Raepsaet, Jean-Marc Joubert, Experimental study and thermodynamic assessment of the erbium–hydrogen binary system, Calphad 41, 50-59 (2013). doi:10.1016/j.calphad.2013.01.004

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}
}