Er–Mg system

7 accepted literature values from 1 paper(s) (unspecified 7); 1 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 · interactive phase diagram · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
unspecified	7

Accepted values by property group
Property group	Values
invariant reaction	5
phase transition	2

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
ErMg-02Cac.tdb	G. Cacciamani, A. Saccone, S. De Negri, R. Ferro, J. Phase Equilib., 23, 38-50(2002). doi:10.1361/105497102770332199	`e4be248b91beab3149c361c6433acf2ab88a35a29fc0aecf0ebeb97a09c7f3f2`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
ErMg-02Cac.tdb	1530	HCP_A3 (x(Mg) 0.11354) + B2_BCC (x(Mg) 0.14533) + LIQUID (x(Mg) 0.28228)
ErMg-02Cac.tdb	1530	HCP_A3 (x(Mg) 0.11354) + BCC_A2 (x(Mg) 0.14533) + LIQUID (x(Mg) 0.28228)
ErMg-02Cac.tdb	1098.14	B2_BCC (x(Mg) 0.43804) + B2_BCC#2 (x(Mg) 0.48377) + LIQUID (x(Mg) 0.61845)
ErMg-02Cac.tdb	1098.14	BCC_A2 (x(Mg) 0.43804) + B2_BCC (x(Mg) 0.48377) + LIQUID (x(Mg) 0.61845)
ErMg-02Cac.tdb	1098.14	B2_BCC#2 (x(Mg) 0.43804) + B2_BCC (x(Mg) 0.48377) + LIQUID (x(Mg) 0.61845)
ErMg-02Cac.tdb	952.28	B2_BCC (x(Mg) 0.62073) + C14_LAVES (x(Mg) 0.66697) + LIQUID (x(Mg) 0.7825)
ErMg-02Cac.tdb	944.85	HCP_A3 (x(Mg) 0.148) + BCC_A2 (x(Mg) 0.24533) + B2_BCC (x(Mg) 0.44713)
ErMg-02Cac.tdb	944.85	HCP_A3 (x(Mg) 0.148) + B2_BCC#2 (x(Mg) 0.24533) + B2_BCC (x(Mg) 0.44713)
ErMg-02Cac.tdb	944.85	HCP_A3 (x(Mg) 0.148) + B2_BCC#2 (x(Mg) 0.24533) + B2_BCC (x(Mg) 0.44713)
ErMg-02Cac.tdb	875.96	C14_LAVES (x(Mg) 0.68045) + ER5MG24_A12 (x(Mg) 0.83212) + LIQUID (x(Mg) 0.8454)
ErMg-02Cac.tdb	839.55	ER5MG24_A12 (x(Mg) 0.846) + LIQUID (x(Mg) 0.90812) + HCP_A3 (x(Mg) 0.93798)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Er–Mg system (5)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1498.15	peritectic: L + (Er) -> "(βEr)"	L: Mg 0.28; (Er): Mg 0.1; "(βEr)": Mg 0.17	unspecified	[1] Okamoto 1992	Table 1, p. 2, row 7 report
1103.15	peritectic: L + "(βEr)" -> MgEr	L: Mg 0.63; "(βEr)": Mg 0.43; MgEr: Mg 0.5	unspecified	[1] Okamoto 1992	Table 1, p. 2, row 5 report
953.15	eutectoid: "(βEr)" -> MgEr + (Er)	"(βEr)": Mg 0.305; MgEr: Mg 0.5; (Er): Mg 0.13	unspecified	[1] Okamoto 1992	Table 1, p. 2, row 6 report
943.15	peritectic: L + MgEr -> Mg2Er	L: Mg 0.8; MgEr: Mg 0.5; Mg2Er: Mg 0.667	unspecified	[1] Okamoto 1992	Table 1, p. 2, row 4 report
873.15	peritectic: L + Mg2Er -> Mg24Er5	L: Mg 0.85; Mg2Er: Mg 0.667; Mg24Er5: Mg 0.828	unspecified	[1] Okamoto 1992	Table 1, p. 2, row 3 report

Other properties

Phase transition (2)

Phase transition, Er–Mg system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	923.15 K	923.15	congruent melting: L -> Mg Mg: Mg 1	unspecified	[1] Okamoto 1992	Table 1, p. 2, row 1 report
Phase transition	1802.15 K	1802.15	congruent melting: L -> Er Er: Mg 0	unspecified	[1] Okamoto 1992	Table 1, p. 2, row 8 report

Sources

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

H. Okamoto, Er-Lu (Erbium-Lutetium), JPE 13, 676-677 (1992). doi:10.1007/bf02667226

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}
}