Ge–Mg system

4 accepted literature values from 1 paper(s) (experimental 3, model 1); 3 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	3
model	1

Accepted values by property group
Property group	Values
formation	4

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
GeMg-06Isl.tdb	F. Islam, A.K. Thykadavil, M. Medraj, J. Alloys Compd., 425, 129-39(2006). doi:10.1016/j.jallcom.2006.01.050	`8081df690d59d0288fa48a0f6fcdd1eb86496be933061db1ef32b8b5bbd63859`	viewer · TDB · JSON
GeMg-10Yan-1.tdb	H. Yan, Y. Du, L. Zhou, H. Xu, L. Zhang, S. Liu, Int. J. Mater. Res., 101, 1489-96(2010). doi:10.3139/146.110436	`22c07581734a575745402dc6ff241911e9de0e5c7b44a331337ea0314a36723f`	viewer · TDB · JSON
GeMg-10Yan-2.tdb	H. Yan, Y. Du, L. Zhou, H. Xu, L. Zhang, S. Liu, Int. J. Mater. Res., 101, 1489-96(2010). doi:10.3139/146.110436	`12570a7d080460a42c613fdeebe0a3a915ed74f13e4b346d4dff43f852263d90`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GeMg-06Isl.tdb	969.29	DIAMOND_A4 (x(Mg) 0) + LIQUID (x(Mg) 0.34925) + GEMG2_C1 (x(Mg) 0.66667)
GeMg-06Isl.tdb	969.29	DIAMOND_A4 (x(Mg) 0) + LIQUID (x(Mg) 0.34923) + GEMG2_C1 (x(Mg) 0.66667)
GeMg-06Isl.tdb	969.29	DIAMOND_A4 (x(Mg) 0) + LIQUID (x(Mg) 0.3492) + GEMG2_C1 (x(Mg) 0.66667)
GeMg-06Isl.tdb	923	GEMG2_C1 (x(Mg) 0.66667) + HCP_A3 (x(Mg) 1) + LIQUID (x(Mg) 1)
GeMg-06Isl.tdb	903.9	GEMG2_C1 (x(Mg) 0.66667) + LIQUID (x(Mg) 0.974) + HCP_A3 (x(Mg) 1)
GeMg-06Isl.tdb	903.9	GEMG2_C1 (x(Mg) 0.66667) + LIQUID (x(Mg) 0.97424) + HCP_A3 (x(Mg) 1)
GeMg-10Yan-1.tdb	971.08	DIAMOND_A4 (x(Mg) 0) + LIQUID (x(Mg) 0.36727) + GEMG2_C1 (x(Mg) 0.66667)
GeMg-10Yan-1.tdb	971.08	DIAMOND_A4 (x(Mg) 0) + LIQUID (x(Mg) 0.36723) + GEMG2_C1 (x(Mg) 0.66667)
GeMg-10Yan-1.tdb	971.08	DIAMOND_A4 (x(Mg) 0) + LIQUID (x(Mg) 0.36721) + GEMG2_C1 (x(Mg) 0.66667)
GeMg-10Yan-1.tdb	907.39	GEMG2_C1 (x(Mg) 0.66667) + LIQUID (x(Mg) 0.97817) + HCP_A3 (x(Mg) 1)
GeMg-10Yan-1.tdb	907.39	GEMG2_C1 (x(Mg) 0.66667) + LIQUID (x(Mg) 0.97832) + HCP_A3 (x(Mg) 1)
GeMg-10Yan-2.tdb	972.29	DIAMOND_A4 (x(Mg) 0) + LIQUID (x(Mg) 0.37066) + GEMG2_C1 (x(Mg) 0.66667)
GeMg-10Yan-2.tdb	903.71	GEMG2_C1 (x(Mg) 0.66667) + LIQUID (x(Mg) 0.9778) + HCP_A3 (x(Mg) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull GeMg-06Isl · CALPHAD hull GeMg-10Yan-2

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, Ge–Mg system (4)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location	Quote
Mg2Ge		-115.37 unspecified ± 0.25	298.15	experimental			[1] Islam 2006 cites Beardmore 1966	p. 5 report	They found that the heat of formation of Mg2 Ge at 298 K from the solid elements is -104.23 ± 1.26 kJ, whereas Beardmore et al. [30] reported the same as -115.37 ± 0.25 kJ, showing a disagreement between the two values.
Mg2Ge		-104.23 unspecified ± 1.26	298.15	experimental			[1] Islam 2006	p. 5 report	They found that the heat of formation of Mg2 Ge at 298 K from the solid elements is -104.23 ± 1.26 kJ, whereas Beardmore et al. [30] reported the same as -115.37 ± 0.25 kJ, showing a disagreement between the two values.
Mg2Ge	GeMg2	-39.3728 kJ/mol-atom	298.15	model	-25.946 (mp-aaaaaaps)	-26.833 (oqmd-646873)	[1] Islam 2006	Table 3, p. 5, row 6 report
Mg2Ge	GeMg2	-38.409 kJ/mol-atom ± 0.0837	273	experimental	-25.946 (mp-aaaaaaps)	-26.833 (oqmd-646873)	[1] Islam 2006 cites Bever 1964	Table 3, p. 5, row 4 report

Sources

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

F. Islam, A.K. Thykadavil, M. Medraj, A computational thermodynamic model of the Mg–Al–Ge system, Journal of Alloys and Compounds 425, 129-139 (2006). doi:10.1016/j.jallcom.2006.01.050

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}
}