# Gd–Zn system > Gd–Zn system: 26 accepted literature values (invariant reaction 26) and 1 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/GD-ZN.html · Markdown: https://data.orchid-project.org/systems/GD-ZN.md 26 accepted literature values from 1 paper(s) (experimental 13, model 13); 1 calculated phase diagram(s). 5 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV. Data: [JSON](https://data.orchid-project.org/literature/systems/GD-ZN.json) · [CSV](https://data.orchid-project.org/systems/GD-ZN.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#GD-ZN) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#GD-ZN/GdZn-15Gro.json) · [phases (12)](https://data.orchid-project.org/phases/pages/GD-ZN.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/GD-ZN.html) · [Markdown](https://data.orchid-project.org/systems/GD-ZN.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 13 | | model | 13 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 26 | ## 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 | |---|---|---|---| | GdZn-15Gro.tdb | J. Groebner, A. Kozlov, X.-Y. Fang, S. Zhu, J.-F. Nie, M.A. Gibson, R. Schmid-Fetzer, Acta Mater., 90, 400-16(2015). [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) | `9f155d2a3829e5b7efc5d1daa3acfff0c74ecae59c49261e61508af6052bf111` | [viewer](https://orchid-project.org/phase-diagrams/#GD-ZN/GdZn-15Gro.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GdZn-15Gro.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | GdZn-15Gro.tdb | 1508.12 | HCP_A3 (x(Zn) 7.000e-5) + BCC_A2 (x(Zn) 8.000e-5) + LIQUID (x(Zn) 0.04283) | | GdZn-15Gro.tdb | 1508.12 | HCP_A3 (x(Zn) 7.000e-5) + BCC_A2 (x(Zn) 8.000e-5) + LIQUID (x(Zn) 0.04283) | | GdZn-15Gro.tdb | 1211.89 | GDZN_B2 (x(Zn) 0.5) + LIQUID (x(Zn) 0.59415) + GDZN2 (x(Zn) 0.66667) | | GdZn-15Gro.tdb | 1211.89 | GDZN_B2 (x(Zn) 0.5) + LIQUID (x(Zn) 0.59428) + GDZN2 (x(Zn) 0.66667) | | GdZn-15Gro.tdb | 1211.89 | GDZN_B2 (x(Zn) 0.5) + LIQUID (x(Zn) 0.59414) + GDZN2 (x(Zn) 0.66667) | | GdZn-15Gro.tdb | 1178.54 | LIQUID (x(Zn) 0.85796) + GD3ZN22 (x(Zn) 0.88) + GD2ZN17 (x(Zn) 0.89474) | | GdZn-15Gro.tdb | 1178.54 | LIQUID (x(Zn) 0.85759) + GD3ZN22 (x(Zn) 0.88) + GD2ZN17 (x(Zn) 0.89474) | | GdZn-15Gro.tdb | 1178.53 | LIQUID (x(Zn) 0.85778) + GD3ZN22 (x(Zn) 0.88) + GD2ZN17 (x(Zn) 0.89474) | | GdZn-15Gro.tdb | 1175.03 | GDZN2 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.74822) + GDZN3 (x(Zn) 0.75) | | GdZn-15Gro.tdb | 1175.03 | GDZN2 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.74804) + GDZN3 (x(Zn) 0.75) | | GdZn-15Gro.tdb | 1167.36 | GD13ZN58 (x(Zn) 0.8169) + LIQUID (x(Zn) 0.84673) + GD3ZN22 (x(Zn) 0.88) | | GdZn-15Gro.tdb | 1167.36 | GD13ZN58 (x(Zn) 0.8169) + LIQUID (x(Zn) 0.84663) + GD3ZN22 (x(Zn) 0.88) | | GdZn-15Gro.tdb | 1166.38 | LIQUID (x(Zn) 0.78503) + GD3ZN11 (x(Zn) 0.78571) + GD13ZN58 (x(Zn) 0.8169) | | GdZn-15Gro.tdb | 1166.38 | LIQUID (x(Zn) 0.78516) + GD3ZN11 (x(Zn) 0.78571) + GD13ZN58 (x(Zn) 0.8169) | | GdZn-15Gro.tdb | 1166.38 | LIQUID (x(Zn) 0.78497) + GD3ZN11 (x(Zn) 0.78571) + GD13ZN58 (x(Zn) 0.8169) | | GdZn-15Gro.tdb | 1164.42 | GDZN3 (x(Zn) 0.75) + LIQUID (x(Zn) 0.77482) + GD3ZN11 (x(Zn) 0.78571) | | GdZn-15Gro.tdb | 1164.41 | GDZN3 (x(Zn) 0.75) + LIQUID (x(Zn) 0.77495) + GD3ZN11 (x(Zn) 0.78571) | | GdZn-15Gro.tdb | 1044.71 | HCP_A3 (x(Zn) 6.000e-5) + LIQUID (x(Zn) 0.28032) + GDZN_B2 (x(Zn) 0.5) | | GdZn-15Gro.tdb | 1044.71 | HCP_A3 (x(Zn) 6.000e-5) + LIQUID (x(Zn) 0.28033) + GDZN_B2 (x(Zn) 0.5) | | GdZn-15Gro.tdb | 932.14 | GD2ZN17 (x(Zn) 0.89474) + GDZN12_D2B (x(Zn) 0.92308) + LIQUID (x(Zn) 0.99305) | | GdZn-15Gro.tdb | 932.14 | GD2ZN17 (x(Zn) 0.89474) + GDZN12_D2B (x(Zn) 0.92308) + LIQUID (x(Zn) 0.99303) | | GdZn-15Gro.tdb | 692.67 | GDZN12_D2B (x(Zn) 0.92308) + HCP_A3 (x(Zn) 1) + LIQUID (x(Zn) 1) | | GdZn-15Gro.tdb | 692.67 | GDZN12_D2B (x(Zn) 0.92308) + HCP_A3 (x(Zn) 1) + LIQUID (x(Zn) 1) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/GD/GD-ZN.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/GD/GD-ZN.json) ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the Gd–Zn system (26) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 1294.75 | congruent melting: L = GdZn | L: Zn 0.5; GdZn: Gd 0.5, Zn 0.5 | model | [1] Gröbner 2015 | Table 2, p. 3, row 4; `ORC-4KNEXDQ6DK` | | | 1293.15 | congruent melting: L = GdZn | L: Zn 0.5; GdZn: Gd 0.5, Zn 0.5 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 3; `ORC-YVCAD3R2KE` | | | 1285.05 | congruent melting: L = GdZn2 | L: Zn 0.667; GdZn2: Gd 0.333333, Zn 0.666667 | model | [1] Gröbner 2015 | Table 2, p. 3, row 8; `ORC-DV7MO6TCHR` | | | 1283.15 | congruent melting: L = GdZn2 | L: Zn 0.667; GdZn2: Gd 0.333333, Zn 0.666667 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 7; `ORC-CSPJUHAOTK` | | | 1218.15 | L = GdZn + GdZn2 | L: Zn 0.59; GdZn: Gd 0.5, Zn 0.5; GdZn2: Gd 0.333333, Zn 0.666667 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 5; `ORC-UJLHAWM6Y2` | | | 1215.45 | L = GdZn + GdZn2 | L: Zn 0.594; GdZn: Gd 0.5, Zn 0.5; GdZn2: Gd 0.333333, Zn 0.666667 | model | [1] Gröbner 2015 | Table 2, p. 3, row 6; `ORC-IZV7XYDXSU` | | | 1208.15 | L + Gd2Zn17 | L: Zn 0.895; Gd2Zn17: Gd 0.105263, Zn 0.894737 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 21; `ORC-RVGTW5HHJM` | | | 1205.55 | L + Gd2Zn17 | L: Zn 0.895; Gd2Zn17: Gd 0.105263, Zn 0.894737 | model | [1] Gröbner 2015 | Table 2, p. 3, row 22; `ORC-CBLKY5P7D3` | | | 1193.15 | congruent melting: L = Gd13Zn58 | L: Zn 0.817; Gd13Zn58: Gd 0.183099, Zn 0.816901 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 15; `ORC-C65O5A3A6R` | | | 1185.95 | congruent melting: L = Gd13Zn58 | L: Zn 0.817; Gd13Zn58: Gd 0.183099, Zn 0.816901 | model | [1] Gröbner 2015 | Table 2, p. 3, row 16; `ORC-4WQR5YROU2` | | | 1183.15 | L + Gd2Zn17 = Gd3Zn22 | L: Zn 0.85; Gd2Zn17: Gd 0.105263, Zn 0.894737; Gd3Zn22: Gd 0.12, Zn 0.88 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 19; `ORC-OLIUMEQ7LL` | | | 1179.85 | L + Gd2Zn17 = Gd3Zn22 | L: Zn 0.858; Gd2Zn17: Gd 0.105263, Zn 0.894737; Gd3Zn22: Gd 0.12, Zn 0.88 | model | [1] Gröbner 2015 | Table 2, p. 3, row 20; `ORC-ACZ5NMMJ3R` | | | 1178.15 | L = GdZn2 + GdZn3 | L: Zn 0.755; GdZn2: Gd 0.333333, Zn 0.666667; GdZn3: Gd 0.25, Zn 0.75 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 9; `ORC-TMXQFKAMQP` | | | 1177.65 | L = GdZn2 + GdZn3 | L: Zn 0.748; GdZn2: Gd 0.333333, Zn 0.666667; GdZn3: Gd 0.25, Zn 0.75 | model | [1] Gröbner 2015 | Table 2, p. 3, row 10; `ORC-PO5WKPUAXY` | | | 1168.95 | L = Gd13Zn58 + Gd3Zn22 | L: Zn 0.847; Gd13Zn58: Gd 0.183099, Zn 0.816901; Gd3Zn22: Gd 0.12, Zn 0.88 | model | [1] Gröbner 2015 | Table 2, p. 3, row 18; `ORC-RVKGT3JNXR` | | | 1168.65 | L + Gd13Zn58 = Gd3Zn11 | L: Zn 0.785; Gd13Zn58: Gd 0.183099, Zn 0.816901; Gd3Zn11: Gd 0.214286, Zn 0.785714 | model | [1] Gröbner 2015 | Table 2, p. 3, row 14; `ORC-247TT5D7XY` | | | 1166.75 | L = GdZn3 + Gd3Zn11 | L: Zn 0.775; GdZn3: Gd 0.25, Zn 0.75; Gd3Zn11: Gd 0.214286, Zn 0.785714 | model | [1] Gröbner 2015 | Table 2, p. 3, row 12; `ORC-6PCU5EUJO7` | | | 1158.15 | L = Gd13Zn58 + Gd3Zn22 | L: Zn 0.84; Gd13Zn58: Gd 0.183099, Zn 0.816901; Gd3Zn22: Gd 0.12, Zn 0.88 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 17; `ORC-VP55T75NBF` | | | 1153.15 | L + Gd13Zn58 = Gd3Zn11 | L: Zn 0.775; Gd13Zn58: Gd 0.183099, Zn 0.816901; Gd3Zn11: Gd 0.214286, Zn 0.785714 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 13; `ORC-KKVXBUC5NQ` | | | 1148.15 | L = GdZn3 + Gd3Zn11 | L: Zn 0.77; GdZn3: Gd 0.25, Zn 0.75; Gd3Zn11: Gd 0.214286, Zn 0.785714 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 11; `ORC-5E2FQFYORJ` | | | 1053.45 | L = (Gd) + GdZn | L: Zn 0.282; GdZn: Gd 0.5, Zn 0.5 | model | [1] Gröbner 2015 | Table 2, p. 3, row 2; `ORC-524LJHPFNJ` | | | 1053.15 | L = (Gd) + GdZn | L: Zn 0.27; GdZn: Gd 0.5, Zn 0.5 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 1; `ORC-T62QGGAY76` | | | 933.15 | L + Gd2Zn17 = GdZn12 | L: Zn 0.985; Gd2Zn17: Gd 0.105263, Zn 0.894737; GdZn12: Gd 0.076923, Zn 0.923077 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 23; `ORC-J5QMMTO3PO` | | | 932.45 | L + Gd2Zn17 = GdZn12 | L: Zn 0.993; Gd2Zn17: Gd 0.105263, Zn 0.894737; GdZn12: Gd 0.076923, Zn 0.923077 | model | [1] Gröbner 2015 | Table 2, p. 3, row 24; `ORC-T75HSIBGWS` | | | 693.15 | L = GdZn12 + (Zn) | L: Zn 0.995; GdZn12: Gd 0.076923, Zn 0.923077 | experimental | [1] Gröbner 2015; _cites Bruzzone 1970_ [doi](https://doi.org/10.1016/0022-5088%2870%2990074-3) | Table 2, p. 3, row 25; `ORC-C7MAPOSLG3` | | | 692.65 | L = GdZn12 + (Zn) | L: Zn 0.999; GdZn12: Gd 0.076923, Zn 0.923077 | model | [1] Gröbner 2015 | Table 2, p. 3, row 26; `ORC-RKVU3IL5EN` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) ## 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/).