# Ge–Mg system > Ge–Mg system: 4 accepted literature values (formation 4) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/GE-MG.html · Markdown: https://data.orchid-project.org/systems/GE-MG.md 4 accepted literature values from 1 paper(s) (experimental 3, model 1); 3 calculated phase diagram(s). Data: [JSON](https://data.orchid-project.org/literature/systems/GE-MG.json) · [CSV](https://data.orchid-project.org/systems/GE-MG.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#GE-MG) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#GE-MG/GeMg-06Isl.json) · [phases (6)](https://data.orchid-project.org/phases/pages/GE-MG.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/GE-MG.html) · [Markdown](https://data.orchid-project.org/systems/GE-MG.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 3 | | model | 1 | Table: 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. Table: 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](https://doi.org/10.1016/j.jallcom.2006.01.050) | `8081df690d59d0288fa48a0f6fcdd1eb86496be933061db1ef32b8b5bbd63859` | [viewer](https://orchid-project.org/phase-diagrams/#GE-MG/GeMg-06Isl.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GeMg-06Isl.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GeMg-06Isl.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](https://doi.org/10.3139/146.110436) | `22c07581734a575745402dc6ff241911e9de0e5c7b44a331337ea0314a36723f` | [viewer](https://orchid-project.org/phase-diagrams/#GE-MG/GeMg-10Yan-1.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GeMg-10Yan-1.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GeMg-10Yan-1.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](https://doi.org/10.3139/146.110436) | `12570a7d080460a42c613fdeebe0a3a915ed74f13e4b346d4dff43f852263d90` | [viewer](https://orchid-project.org/phase-diagrams/#GE-MG/GeMg-10Yan-2.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GeMg-10Yan-2.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GeMg-10Yan-2.json) | Table: 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](https://data.orchid-project.org/hulls/dft-mp/GE/GE-MG.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/GE/GE-MG.json) · [CALPHAD hull GeMg-06Isl](https://data.orchid-project.org/hulls/calphad-sgte/GE/GE-MG--GeMg-06Isl.json) · [CALPHAD hull GeMg-10Yan-2](https://data.orchid-project.org/hulls/calphad-sgte/GE/GE-MG--GeMg-10Yan-2.json) ## 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](https://data.orchid-project.org/literature/dft_parity.json). Table: 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; `ORC-OW7BGO2K5U.a495c1` | “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; `ORC-OW7BGO2K5U.d7667b` | “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](https://data.orchid-project.org/compounds/GeMg2.html) | -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; `ORC-CHNOD5UYR2` | | | Mg2Ge | [GeMg2](https://data.orchid-project.org/compounds/GeMg2.html) | -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; `ORC-DY5S7B6XOQ` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. 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](https://doi.org/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). https://doi.org/10.5281/zenodo.23735569 - R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/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). https://doi.org/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). https://doi.org/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. ```bibtex @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} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).