# Au–Te system > Au–Te system: 28 accepted literature values (invariant reaction 10, phase transition 7, crystal structure 6, formation 4) 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-TE.html · Markdown: https://data.orchid-project.org/systems/AU-TE.md 28 accepted literature values from 2 paper(s) (experimental 25, model 3); 2 calculated phase diagram(s). 15 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-TE.json) · [CSV](https://data.orchid-project.org/systems/AU-TE.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AU-TE) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#AU-TE/AuTe-06Wan.json) · [phases (6)](https://data.orchid-project.org/phases/pages/AU-TE.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AU-TE.html) · [Markdown](https://data.orchid-project.org/systems/AU-TE.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 25 | | model | 3 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 10 | | phase transition | 7 | | formation | 4 | | crystal structure | 6 | | other property | 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 | |---|---|---|---| | AuTe-06Wan.tdb | J. Wang, X.-G. Lu, B. Sundman, X. Su, J. Alloys Compd., 407, 106-11(2006). [doi:10.1016/j.jallcom.2005.05.038](https://doi.org/10.1016/j.jallcom.2005.05.038) | `03172f4e43a2f653f818fbbdcc7f41e60472fa03e9582242975439feab85d909` | [viewer](https://orchid-project.org/phase-diagrams/#AU-TE/AuTe-06Wan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AuTe-06Wan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AuTe-06Wan.json) | | AuTe-94Feu-LB.tdb | Y. Feutelais, D. Mouani, J.R. Didry, B. Legendre, J. Phase Equilib., 15, 380-85(1994). [doi:10.1007/BF02647557](https://doi.org/10.1007/BF02647557) | `92fa89b9beed51a93a85bd15ff5130e9d40e9174624824aa1afbe8656d77bd8b` | [viewer](https://orchid-project.org/phase-diagrams/#AU-TE/AuTe-94Feu-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AuTe-94Feu-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AuTe-94Feu-LB.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | AuTe-06Wan.tdb | 718.44 | FCC_A1 (x(Te) 0) + LIQUID (x(Te) 0.53882) + AUTE2_C34 (x(Te) 0.66667) | | AuTe-06Wan.tdb | 718.43 | FCC_A1 (x(Te) 0) + LIQUID (x(Te) 0.53953) + AUTE2_C34 (x(Te) 0.66667) | | AuTe-06Wan.tdb | 718.43 | FCC_A1 (x(Te) 0) + LIQUID (x(Te) 0.53942) + AUTE2_C34 (x(Te) 0.66667) | | AuTe-06Wan.tdb | 689.88 | AUTE2_C34 (x(Te) 0.66667) + LIQUID (x(Te) 0.87066) + HEXAGONAL_A8 (x(Te) 1) | | AuTe-06Wan.tdb | 689.88 | AUTE2_C34 (x(Te) 0.66667) + LIQUID (x(Te) 0.87069) + HEXAGONAL_A8 (x(Te) 1) | | AuTe-94Feu-LB.tdb | 719.88 | FCC_A1 (x(Te) 0) + LIQUID (x(Te) 0.54578) + AUTE2_C34 (x(Te) 0.66667) | | AuTe-94Feu-LB.tdb | 719.88 | FCC_A1 (x(Te) 0) + LIQUID (x(Te) 0.54553) + AUTE2_C34 (x(Te) 0.66667) | | AuTe-94Feu-LB.tdb | 688.82 | AUTE2_C34 (x(Te) 0.66667) + LIQUID (x(Te) 0.87187) + HEXAGONAL_A8 (x(Te) 1) | | AuTe-94Feu-LB.tdb | 315.22 | FCC_A1 (x(Te) 0) + AUTE2_C34 (x(Te) 0.66667) + HEXAGONAL_A8 (x(Te) 1) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/AU/AU-TE.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/AU/AU-TE.json) · [CALPHAD hull AuTe-94Feu-LB](https://data.orchid-project.org/hulls/calphad-sgte/AU/AU-TE--AuTe-94Feu-LB.json) ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the Au–Te system (10) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 725 | eutectic: Liquid = fcc (Au) + AuTe2 | fcc (Au): Te 0; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Pelabon 1909_ | Table 2, p. 3, row 4; `ORC-V2FLHU22AM` | | | 721 | eutectic: Liquid = fcc (Au) + AuTe2 | fcc (Au): Te 0; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Bergman 1977_ [doi](https://doi.org/10.1002/bbpc.19770811024) | Table 2, p. 3, row 3; `ORC-OPSM4OS5Y4` | | | 720 | eutectic: Liquid = fcc (Au) + AuTe2 | fcc (Au): Te 0; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Pellini 1910_ | Table 2, p. 3, row 2; `ORC-7DGTPIIS7B` | | | 718.4 | eutectic: Liquid = fcc (Au) + AuTe2 | fcc (Au): Te 0; AuTe2: Te 0.666667 | model | [1] Wang 2006 | Table 2, p. 3, row 5; `ORC-66KNT4ZUUD` | | | 705 | eutectic: Liquid = fcc (Au) + AuTe2 | fcc (Au): Te 0; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Rose 1908_ | Table 2, p. 3, row 1; `ORC-JNAPOEGBV7` | | | 690 | eutectic: Liquid = hex (Te) + AuTe2 | hex (Te): Te 1; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Bergman 1977_ [doi](https://doi.org/10.1002/bbpc.19770811024) | Table 2, p. 3, row 9; `ORC-GSXMD4IF5F` | | | 689.9 | eutectic: Liquid = hex (Te) + AuTe2 | hex (Te): Te 1; AuTe2: Te 0.666667 | model | [1] Wang 2006 | Table 2, p. 3, row 10; `ORC-U47757QKEJ` | | | 689 | eutectic: Liquid = hex (Te) + AuTe2 | hex (Te): Te 1; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Pellini 1910_ | Table 2, p. 3, row 8; `ORC-PZBW745NCP` | | | 688 | eutectic: Liquid = hex (Te) + AuTe2 | hex (Te): Te 1; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Pelabon 1909_ | Table 2, p. 3, row 7; `ORC-72ECS346B7` | | | 670 | eutectic: Liquid = hex (Te) + AuTe2 | hex (Te): Te 1; AuTe2: Te 0.666667 | experimental | [1] Wang 2006; _cites Rose 1908_ | Table 2, p. 3, row 6; `ORC-ZVF7Y2GU5R` | | ## 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, Au–Te system (4) | Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote | |---|---|---:|---:|---|---:|---:|---|---|---| | AuTe2 | [AuTe2](https://data.orchid-project.org/compounds/AuTe2.html) | -4.74 kJ/mol-atom | 298.15 | experimental | -8.675 (mp-aaaabdtz) | -8.029 (oqmd-6956) | [1] Wang 2006; _cites Andon 1971_ [doi](https://doi.org/10.1039/j19710001788) | p. 3; `ORC-PIT3OT5WS4.0347a2` | “The data for enthalpy of formation of AuTe2 obtained from vapor pressure measurements by Andon et al. \[21\] and Veale and Barrett \[13\] are -4.74 and -3.91 kJ per mole atoms, respectively, at 298 K.” | | AuTe2 | [AuTe2](https://data.orchid-project.org/compounds/AuTe2.html) | -3.91 kJ/mol-atom | 298.15 | experimental | -8.675 (mp-aaaabdtz) | -8.029 (oqmd-6956) | [1] Wang 2006; _cites Veale 1967_ [doi](https://doi.org/10.1016/0022-5088%2867%2990110-5) | p. 3; `ORC-PIT3OT5WS4.72d95c` | “The data for enthalpy of formation of AuTe2 obtained from vapor pressure measurements by Andon et al. \[21\] and Veale and Barrett \[13\] are -4.74 and -3.91 kJ per mole atoms, respectively, at 298 K.” | | AuTe2 | [AuTe2](https://data.orchid-project.org/compounds/AuTe2.html) | -3 kJ/mol-atom | 298.15 | experimental | -8.675 (mp-aaaabdtz) | -8.029 (oqmd-6956) | [1] Wang 2006 | p. 3; `ORC-PAHTSG7EPU` | “They obtained the enthalpy of formation of AuTe2 compound at 298 K (-3.0 kJ per mole of atoms) and the enthalpy of fusion (19.1 kJ per mole of atoms).” | | AuTe2 | [AuTe2](https://data.orchid-project.org/compounds/AuTe2.html) | -2.5 kJ/mol-atom | 728 | experimental | -8.675 (mp-aaaabdtz) | -8.029 (oqmd-6956) | [1] Wang 2006; _cites Bergman 1977_ [doi](https://doi.org/10.1002/bbpc.19770811024) | p. 3; `ORC-7O4F7ARINC.45bbae` | “The enthalpy of formation of AuTe2 compound at 728 K is -2.5 kJ per mole of atoms and the enthalpy of fusion at 737 K is 18.6 kJ per mole of atoms, which were measured by direct reaction calorimetry \[3\].” | ## Other properties ### Phase transition (7) Table: Phase transition, Au–Te system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Phase transition | 708.15 K | 708.15 | AuTe2 | experimental | [2] Feutelais 1994; _cites Winkler 1964_ | p. 2; `ORC-2FBBYYQHEM` | “Later, \[64Win\] pointed out a crystalline transformation of the AuTe 2 compound at 435 ~” | | Phase transition | 717.15 K | 717.15 | AuTe2 | experimental | [2] Feutelais 1994; _cites ref. 65Cab_ | p. 2; `ORC-AY36ELOJYJ` | “On the same compound, using high temperature X-ray powder diffraction, \[65Cab\] found at 444 ~ on only one occasion a diffraction pattern different from this one obtained at room temperature.” | | Phase transition | 725 K | 725 | congruent melting: Liquid = AuTe2; _L: Te 0.666667; AuTe2: Te 0.666667_ | experimental | [1] Wang 2006; _cites Rose 1908_ | Table 2, p. 3, row 12; `ORC-EE6MIHNNIY` | | | Phase transition | 736 K | 736 | congruent melting: Liquid = AuTe2; _L: Te 0.666667; AuTe2: Te 0.666667_ | experimental | [1] Wang 2006; _cites Bergman 1977_ [doi](https://doi.org/10.1002/bbpc.19770811024) | Table 2, p. 3, row 13; `ORC-QYBTXIEXAE` | | | Phase transition | 736.75 K | 736.75 | congruent transformation: 66.67 at.% Te; _alloy: Au 0.3333, Te 0.6667_ | experimental | [2] Feutelais 1994 | Table I, p. 1, row 27; `ORC-ENLKL7A667` | | | Phase transition | 737 K | 737 | congruent melting: Liquid = AuTe2; _L: Te 0.666667; AuTe2: Te 0.666667_ | experimental | [1] Wang 2006; _cites Pellini 1910_ | Table 2, p. 3, row 11; `ORC-IXK2JBOHZB` | | | Phase transition | 738.4 K | 738.4 | congruent melting: Liquid = AuTe2; _L: Te 0.666667; AuTe2: Te 0.666667_ | model | [1] Wang 2006 | Table 2, p. 3, row 14; `ORC-RZLTQYZPHC` | | ### Crystal structure (6) Table: Crystal structure, Au–Te system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Lattice a | 4.098 Å | 298.15 | Au; _alloy: Te 0.5_ | experimental | [2] Feutelais 1994 | Table 3, p. 2, row 4; `ORC-4A43HV2WNV` | | | Lattice a | 4.108 Å | 298.15 | Au; _alloy: Te 0.5_ | experimental | [2] Feutelais 1994 | Table 3, p. 2, row 2; `ORC-IQMAJJYWQW` | | | Lattice a | 4.095 Å | 298.15 | Au; _alloy: Te 0.5_ | experimental | [2] Feutelais 1994 | Table 3, p. 2, row 8; `ORC-LITTMJK7JB` | | | Lattice a | 4.091 Å | 298.15 | Au; _alloy: Te 0.5_ | experimental | [2] Feutelais 1994 | Table 3, p. 2, row 10; `ORC-NFBW5EI7HF` | | | Lattice a | 4.097 Å | 298.15 | Au; _alloy: Te 0.5_ | experimental | [2] Feutelais 1994 | Table 3, p. 2, row 12; `ORC-UQDDDJRXQA` | | | Lattice a | 4.099 Å | 298.15 | Au; _alloy: Te 0.5_ | experimental | [2] Feutelais 1994 | Table 3, p. 2, row 6; `ORC-VRENDOGBZY` | | ### Other property (1) Table: Other property, Au–Te system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Other; _printed: enthalpy of fusion_ | 18.6 kJ per mole of atoms | 737 | | experimental | [1] Wang 2006; _cites Bergman 1977_ [doi](https://doi.org/10.1002/bbpc.19770811024) | p. 3; `ORC-7O4F7ARINC.e3248c` | “The enthalpy of formation of AuTe2 compound at 728 K is -2.5 kJ per mole of atoms and the enthalpy of fusion at 737 K is 18.6 kJ per mole of atoms, which were measured by direct reaction calorimetry \[3\].” | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. Jianhua Wang, Xiao-gang Lu, Bo Sundman, Xuping Su, Thermodynamic reassessment of the Au–Te system, Journal of Alloys and Compounds 407, 106-111 (2006). [doi:10.1016/j.jallcom.2005.05.038](https://doi.org/10.1016/j.jallcom.2005.05.038) 2. Y. Feutelais, D. Mouani, J. R. Didry, B. Legendre, The gold-tellurium system, JPE 15, 380-385 (1994). [doi:10.1007/bf02647557](https://doi.org/10.1007/bf02647557) ## 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/).