# Au–Ru system > Au–Ru system: 20 accepted literature values (phase equilibrium 19, crystal structure 1) and 2 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/AU-RU.html · Markdown: https://data.orchid-project.org/systems/AU-RU.md 20 accepted literature values from 1 paper(s) (model 19, unspecified 1); 2 calculated phase diagram(s). 7 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/AU-RU.json) · [CSV](https://data.orchid-project.org/systems/AU-RU.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AU-RU) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#AU-RU/AuRu-84Oka.json) · [phases (4)](https://data.orchid-project.org/phases/pages/AU-RU.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AU-RU.html) · [Markdown](https://data.orchid-project.org/systems/AU-RU.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | model | 19 | | unspecified | 1 | Table: Accepted values by property group | Property group | Values | |---|---:| | phase equilibrium | 19 | | crystal structure | 1 | ## 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 | |---|---|---|---| | AuRu-84Oka.tdb | H. Okamoto, T.B. Massalski, Bull. Alloy Phase Diag., 5, 388-90(1984). [doi:10.1007/BF02872961](https://doi.org/10.1007/BF02872961) | `431b1a82358b61e6ee676da8df7f791a00877be21eb3c1a2380fec6ddb3c8a23` | [viewer](https://orchid-project.org/phase-diagrams/#AU-RU/AuRu-84Oka.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AuRu-84Oka.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AuRu-84Oka.json) | | AuRu-98Spe-LB.tdb | P.J. Spencer, unpublished, 1998. | `21a44838d8ab9cbaa565e03b39cecf89179d6020af95af2e52c40c61493594e9` | [viewer](https://orchid-project.org/phase-diagrams/#AU-RU/AuRu-98Spe-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AuRu-98Spe-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AuRu-98Spe-LB.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | AuRu-84Oka.tdb | 2371.94 | LIQUID (x(Ru) 0.33567) + LIQUID#2 (x(Ru) 0.66433) + HCP_A3 (x(Ru) 0.99997) | | AuRu-84Oka.tdb | 1339.45 | LIQUID (x(Ru) 0.00626) + FCC_A1 (x(Ru) 0.00816) + HCP_A3 (x(Ru) 0.99995) | | AuRu-98Spe-LB.tdb | 2372.36 | LIQUID (x(Ru) 0.33417) + LIQUID#2 (x(Ru) 0.66583) + HCP_A3 (x(Ru) 0.99997) | | AuRu-98Spe-LB.tdb | 1338.96 | LIQUID (x(Ru) 0.00623) + FCC_A1 (x(Ru) 0.00769) + HCP_A3 (x(Ru) 0.99995) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/AU/AU-RU.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/AU/AU-RU.json) · [CALPHAD hull AuRu-84Oka](https://data.orchid-project.org/hulls/calphad-sgte/AU/AU-RU--AuRu-84Oka.json) ## Other properties ### Phase equilibrium (19) Table: Phase equilibrium, Au–Ru system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Phase composition | | 1339.15 | L (L/L + (Ru)) + L; _L (L/L + (Ru)): Au 0.998, Ru 0.002; L: Au 0.998, Ru 0.002_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 10; `ORC-SD23PQG6LO` | | | Phase composition | | 1473.15 | L (L/L + (Ru)) + L; _L (L/L + (Ru)): Au 0.996, Ru 0.004; L: Au 0.996, Ru 0.004_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 9; `ORC-FRIW7CJTJ6` | | | Phase composition | | 1873.15 | L (L/L + (Ru)) + L; _L (L/L + (Ru)): Au 0.981, Ru 0.019; L: Au 0.981, Ru 0.019_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 8; `ORC-RHHJULQA6U` | | | Phase composition | | 2273.15 | L (L/L + (Ru)) + L; _L (L/L + (Ru)): Au 0.945, Ru 0.055; L: Au 0.945, Ru 0.055_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 7; `ORC-Z3VSMN7USQ` | | | Phase composition | | 2285.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L (L/L + (Ru)) + L1 + L2 + L; _L1 (L1/L1 + L2): Au 0.726, Ru 0.274; L2 (L2/L1 + L2): Au 0.274, Ru 0.726; L (L/L + (Ru)): Au 0.274, Ru 0.726; L1: Au 0.726, Ru 0.274; L2: Au 0.274, Ru 0.726; L: Au 0.274, Ru 0.726_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 6; `ORC-5TMHSARHZM` | | | Phase composition | | 2373.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L (L/L + (Ru)) + L1 + L2 + L; _L1 (L1/L1 + L2): Au 0.664, Ru 0.336; L2 (L2/L1 + L2): Au 0.336, Ru 0.664; L (L/L + (Ru)): Au 0.895, Ru 0.105; L1: Au 0.664, Ru 0.336; L2: Au 0.336, Ru 0.664; L: Au 0.895, Ru 0.105_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 5; `ORC-AUB6GERHRB` | | | Phase composition | | 2414.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L (L/L + (Ru)) + L1 + L2 + L; _L1 (L1/L1 + L2): Au 0.881, Ru 0.119; L2 (L2/L1 + L2): Au 0.119, Ru 0.881; L (L/L + (Ru)): Au 0.119, Ru 0.881; L1: Au 0.881, Ru 0.119; L2: Au 0.119, Ru 0.881; L: Au 0.119, Ru 0.881_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 14; `ORC-3ZCQFQYRZC` | | | Phase composition | | 2423.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L (L/L + (Ru)) + L1 + L2 + L; _L1 (L1/L1 + L2): Au 0.61, Ru 0.39; L2 (L2/L1 + L2): Au 0.39, Ru 0.61; L (L/L + (Ru)): Au 0.1, Ru 0.9; L1: Au 0.61, Ru 0.39; L2: Au 0.39, Ru 0.61; L: Au 0.1, Ru 0.9_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 4; `ORC-NETYOM2MRX` | | | Phase composition | | 2453.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L (L/L + (Ru)) + L1 + L2 + L; _L1 (L1/L1 + L2): Au 0.556, Ru 0.444; L2 (L2/L1 + L2): Au 0.444, Ru 0.556; L (L/L + (Ru)): Au 0.08, Ru 0.92; L1: Au 0.556, Ru 0.444; L2: Au 0.444, Ru 0.556; L: Au 0.08, Ru 0.92_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 3; `ORC-7QOFOQP3OO` | | | Phase composition | | 2473.15 | L (L/L + (Ru)) + L + L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L (L/L + (Ru)): Au 0.911, Ru 0.089; L: Au 0.911, Ru 0.089; L1 (L1/L1 + L2): Au 0.87, Ru 0.13; L2 (L2/L1 + L2): Au 0.13, Ru 0.87; L1: Au 0.87, Ru 0.13; L2: Au 0.13, Ru 0.87_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 2; `ORC-EBWBGFKKZP` | | | Phase composition | | 2496.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L (L/L + (Ru)) + L1 + L2 + L; _L1 (L1/L1 + L2): Au 0.906, Ru 0.094; L2 (L2/L1 + L2): Au 0.061, Ru 0.939; L (L/L + (Ru)): Au 0.061, Ru 0.939; L1: Au 0.906, Ru 0.094; L2: Au 0.061, Ru 0.939; L: Au 0.061, Ru 0.939_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 19; `ORC-M4KYH4OHWN` | | | Phase composition | | 2523.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L (L/L + (Ru)) + L1 + L2 + L; _L1 (L1/L1 + L2): Au 0.902, Ru 0.098; L2 (L2/L1 + L2): Au 0.064, Ru 0.936; L (L/L + (Ru)): Au 0.043, Ru 0.957; L1: Au 0.902, Ru 0.098; L2: Au 0.064, Ru 0.936; L: Au 0.043, Ru 0.957_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 18; `ORC-ELYDFVA2YJ` | | | Phase composition | | 2573.15 | L (L/L + (Ru)) + L + L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L (L/L + (Ru)): Au 0.016, Ru 0.984; L: Au 0.016, Ru 0.984; L1 (L1/L1 + L2): Au 0.895, Ru 0.105; L2 (L2/L1 + L2): Au 0.069, Ru 0.931; L1: Au 0.895, Ru 0.105; L2: Au 0.069, Ru 0.931_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 1; `ORC-6BHE6763QO` | | | Phase composition | | 2873.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L1 (L1/L1 + L2): Au 0.843, Ru 0.157; L2 (L2/L1 + L2): Au 0.108, Ru 0.892; L1: Au 0.843, Ru 0.157; L2: Au 0.108, Ru 0.892_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 13; `ORC-CR7YA3KKD7` | | | Phase composition | | 3073.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L1 (L1/L1 + L2): Au 0.798, Ru 0.202; L2 (L2/L1 + L2): Au 0.143, Ru 0.857; L1: Au 0.798, Ru 0.202; L2: Au 0.143, Ru 0.857_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 12; `ORC-CMHG4IQPNV` | | | Phase composition | | 3123.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L1 (L1/L1 + L2): Au 0.599, Ru 0.401; L2 (L2/L1 + L2): Au 0.401, Ru 0.599; L1: Au 0.599, Ru 0.401; L2: Au 0.401, Ru 0.599_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 11; `ORC-HPO7BEDMB7` | | | Phase composition | | 3273.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L1 (L1/L1 + L2): Au 0.741, Ru 0.259; L2 (L2/L1 + L2): Au 0.188, Ru 0.812; L1: Au 0.741, Ru 0.259; L2: Au 0.188, Ru 0.812_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 17; `ORC-X2PL4NBV64` | | | Phase composition | | 3473.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L1 (L1/L1 + L2): Au 0.666, Ru 0.334; L2 (L2/L1 + L2): Au 0.253, Ru 0.747; L1: Au 0.666, Ru 0.334; L2: Au 0.253, Ru 0.747_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 16; `ORC-JMCPCXGV64` | | | Phase composition | | 3673.15 | L1 (L1/L1 + L2) + L2 (L2/L1 + L2) + L1 + L2; _L1 (L1/L1 + L2): Au 0.529, Ru 0.471; L2 (L2/L1 + L2): Au 0.377, Ru 0.623; L1: Au 0.529, Ru 0.471; L2: Au 0.377, Ru 0.623_ | model | [1] Okamoto 1984 | Table 4, p. 3, row 15; `ORC-F677REK2B5` | | ### Crystal structure (1) Table: Crystal structure, Au–Ru system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Lattice a | 4.0784 Å | 298.15 | (Au) | unspecified | [1] Okamoto 1984 | Table 2, p. 2, row 1; `ORC-OQM56RLPPF` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. H. Okamoto, T. B. Massalski, The Au-Ru (Gold-Ruthenium) system, Bulletin of Alloy Phase Diagrams 5, 388-390 (1984). [doi:10.1007/bf02872961](https://doi.org/10.1007/bf02872961) ## 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/).