# Ho–Te system > Ho–Te system: 36 accepted literature values (crystal structure 18, invariant reaction 11, formation 6, phase transition 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/HO-TE.html · Markdown: https://data.orchid-project.org/systems/HO-TE.md 36 accepted literature values from 2 paper(s) (experimental 18, model 9, DFT 6, unspecified 3); 2 calculated phase diagram(s). 11 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/HO-TE.json) · [CSV](https://data.orchid-project.org/systems/HO-TE.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#HO-TE) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#HO-TE/HoTe-13Gha.json) · [phases (8)](https://data.orchid-project.org/phases/pages/HO-TE.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/HO-TE.html) · [Markdown](https://data.orchid-project.org/systems/HO-TE.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 18 | | model | 9 | | DFT | 6 | | unspecified | 3 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 11 | | phase transition | 1 | | formation | 6 | | crystal structure | 18 | ## 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 | |---|---|---|---| | HoTe-13Gha.tdb | H. Ghamri, A. Belgacem-Bouzida, Y. Djaballah, A. Hidoussi, J. Alloys Compd., 552, 387-91(2013). [doi:10.1016/j.jallcom.2012.11.084](https://doi.org/10.1016/j.jallcom.2012.11.084) | `5d8553f717e4b7cd6d37a20d75ac2f8b716e9e1ec98160f7f8c382b578fe289d` | [viewer](https://orchid-project.org/phase-diagrams/#HO-TE/HoTe-13Gha.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/HoTe-13Gha.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/HoTe-13Gha.json) | | HoTe-23Cui.tdb | D. Cui, J. Wang, J. Zhou, J. Phase Equilib. Diffus., 44, 456-67(2023). [doi:10.1007/s11669-023-01051-1](https://doi.org/10.1007/s11669-023-01051-1) | `49a17617ab6fb11c19f32d9118dc7e7169e2e64c143b9f4472a89892b5932ddf` | [viewer](https://orchid-project.org/phase-diagrams/#HO-TE/HoTe-23Cui.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/HoTe-23Cui.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/HoTe-23Cui.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | HoTe-13Gha.tdb | 1383.12 | HCP_A3 (x(Te) 0) + LIQUID (x(Te) 0.22611) + HOTE_B1 (x(Te) 0.5) | | HoTe-13Gha.tdb | 1383.12 | HCP_A3 (x(Te) 0) + LIQUID (x(Te) 0.2261) + HOTE_B1 (x(Te) 0.5) | | HoTe-13Gha.tdb | 1383.12 | HCP_A3 (x(Te) 0) + LIQUID (x(Te) 0.226) + HOTE_B1 (x(Te) 0.5) | | HoTe-13Gha.tdb | 1076.11 | HOTE_B1 (x(Te) 0.54701) + HO2TE5 (x(Te) 0.71429) + LIQUID (x(Te) 0.93022) | | HoTe-13Gha.tdb | 1045.66 | HO2TE5 (x(Te) 0.71429) + HOTE3 (x(Te) 0.75) + LIQUID (x(Te) 0.94509) | | HoTe-13Gha.tdb | 1045.66 | HO2TE5 (x(Te) 0.71429) + HOTE3 (x(Te) 0.75) + LIQUID (x(Te) 0.94516) | | HoTe-13Gha.tdb | 1045.66 | HO2TE5 (x(Te) 0.71429) + HOTE3 (x(Te) 0.75) + LIQUID (x(Te) 0.94506) | | HoTe-13Gha.tdb | 722.66 | HOTE3 (x(Te) 0.75) + HEXAGONAL_A8 (x(Te) 1) + LIQUID (x(Te) 1) | | HoTe-13Gha.tdb | 722.66 | HOTE3 (x(Te) 0.75) + HEXAGONAL_A8 (x(Te) 1) + LIQUID (x(Te) 1) | | HoTe-23Cui.tdb | 1387.24 | HCP_A3 (x(Te) 0) + LIQUID (x(Te) 0.20391) + HOTE_B1 (x(Te) 0.50015) | | HoTe-23Cui.tdb | 1073.19 | HOTE_B1 (x(Te) 0.53608) + HO2TE5 (x(Te) 0.71429) + LIQUID (x(Te) 0.91828) | | HoTe-23Cui.tdb | 1052.29 | HO2TE5 (x(Te) 0.71429) + HOTE3 (x(Te) 0.75) + LIQUID (x(Te) 0.93402) | | HoTe-23Cui.tdb | 722.64 | HOTE3 (x(Te) 0.75) + LIQUID (x(Te) 0.99994) + HEXAGONAL_A8 (x(Te) 1) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/HO/HO-TE.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/HO/HO-TE.json) · [CALPHAD hull HoTe-13Gha](https://data.orchid-project.org/hulls/calphad-sgte/HO/HO-TE--HoTe-13Gha.json) ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the Ho–Te system (11) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 1643 | congruent melting: Liq \<-> (HoTe) | Liq: Te 0.5; (HoTe): Te 0.5 | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 4, p. 4, row 4; `ORC-A6WW7UXDLY` | | | 1642 | congruent melting: Liq \<-> (HoTe) | Liq: Te 0.5; (HoTe): Te 0.5 | model | [1] Ghamri 2013 | Table 4, p. 4, row 5; `ORC-YA2RFJ3R37` | | | 1383.12 | eutectic: Liq \<-> (Ho) + (HoTe) | Liq: Te 0.2261; (Ho): Te 0; (HoTe): Te 0.5 | model | [1] Ghamri 2013 | Table 4, p. 4, row 3; `ORC-QWATMEEJKG` | | | 1383 | eutectic: Liq \<-> (Ho) + (HoTe) | Liq: Te 0.23; (HoTe): Te 0.485 | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 4, p. 4, row 1; `ORC-JC4RCRCIHL` | | | 1383 | eutectic: Liq \<-> (Ho) + (HoTe) | Liq: Te 0.23; (HoTe): Te 0.5 | experimental | [1] Ghamri 2013; _cites Massalski 1990_ | Table 4, p. 4, row 2; `ORC-WJBKHQDSWD` | | | 1073.1 | peritectic: Liq + (HoTe) \<-> Ho2Te5 | Liq: Te 0.9313; (HoTe): Te 0.547; Ho2Te5: Te 0.714 | model | [1] Ghamri 2013 | Table 4, p. 4, row 7; `ORC-CRMAQTUBU7` | | | 1073 | peritectic: Liq + (HoTe) \<-> Ho2Te5 | (HoTe): Te 0.547; Ho2Te5: Te 0.714 | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 4, p. 4, row 6; `ORC-5PHOTT4K4V` | | | 1053.2 | peritectic: Liq + Ho2Te5 \<-> HoTe3 | Liq: Te 0.9412; Ho2Te5: Te 0.714; HoTe3: Te 0.75 | model | [1] Ghamri 2013 | Table 4, p. 4, row 9; `ORC-7SA27JRA5I` | | | 1053 | peritectic: Liq + Ho2Te5 \<-> HoTe3 | Ho2Te5: Te 0.714; HoTe3: Te 0.75 | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 4, p. 4, row 8; `ORC-OIM7RFMZ4M` | | | 728 | peritectic: Liq \<-> (Te) + HoTe3 | HoTe3: Te 0.75 | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 4, p. 4, row 10; `ORC-2JLCSDTS4I` | | | 722.66 | eutectic: Liq \<-> (Te) + HoTe3 | Liq: Te 0.999; (Te): Te 1; HoTe3: Te 0.75 | model | [1] Ghamri 2013 | Table 4, p. 4, row 11; `ORC-UM7EYK6GR3` | | ## 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, Ho–Te system (6) | Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote | |---|---|---:|---:|---|---:|---:|---|---|---| | Ho2Te5 | | -107.62 kJ/mol-atom | 298.15 | DFT | | | [1] Ghamri 2013 | Table 2, p. 3, row 4; `ORC-546XM6OV2J` | | | Ho2Te5 | [Ho2Te5](https://data.orchid-project.org/compounds/Ho2Te5.html) | -103.917 kJ/mol-atom | 298.15 | model | -122.227 (mp-aaackwra) | -96.625 (oqmd-1798994) | [1] Ghamri 2013 | Table 2, p. 3, row 5; `ORC-DZRPNQEVI4` | | | HoTe | [HoTe](https://data.orchid-project.org/compounds/HoTe.html) | -162 kJ/mol-atom | 298.15 | model | -140.092 (mp-aaaaabjj) | -120.012 (oqmd-8123) | [1] Ghamri 2013; _cites Eichler 1990_ [doi](https://doi.org/10.1016/0022-5088%2890%2990596-c) | Table 2, p. 3, row 1; `ORC-24WFUXDUS5` | | | HoTe | | -153.449 kJ/mol-atom | 298.15 | DFT | | | [1] Ghamri 2013 | Table 2, p. 3, row 2; `ORC-PJVVYNUBB3` | | | HoTe | [HoTe](https://data.orchid-project.org/compounds/HoTe.html) | -152.99 kJ/mol-atom | 298.15 | model | -140.092 (mp-aaaaabjj) | -120.012 (oqmd-8123) | [1] Ghamri 2013 | Table 2, p. 3, row 3; `ORC-XDVTA73MKL` | | | HoTe3 | [HoTe3](https://data.orchid-project.org/compounds/HoTe3.html) | -94 kJ/mol-atom | 298.15 | model | -118.228 (mp-aaacjjlc) | -86.803 (oqmd-1745454) | [1] Ghamri 2013 | Table 2, p. 3, row 6; `ORC-LBPKMIRPYD` | | ## Other properties ### Phase transition (1) Table: Phase transition, Ho–Te system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Phase transition | 1643 K | 1643 | congruent transformation | experimental | [2] Cui 2023; _cites Yarembash 1974_ | p. 3; `ORC-2VSV6TGBQK` | “HoTe has a homogeneity range and melts congruently at about 1643 K.” | ### Crystal structure (18) Table: Crystal structure, Ho–Te system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Lattice a | 6.055 Å | 0 | (HoTe); _alloy: Ho 0.5, Te 0.5_ | DFT | [1] Ghamri 2013 | Table 1, p. 2, row 4; `ORC-3BGMV2NW3O` | | | Lattice a | 4.108 Å | 0 | Ho2Te5; _Ho2Te5: Ho 0.286, Te 0.714_ | DFT | [1] Ghamri 2013 | Table 1, p. 2, row 6; `ORC-KCATGVXNKV.a0d126` | | | Lattice a | 6.09 Å | 298.15 | (HoTe); _alloy: Ho 0.5, Te 0.5_ | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 1, p. 2, row 3; `ORC-HXT3RADVRY` | | | Lattice a | 4.411 Å | 298.15 | Ho2Te5; _Ho2Te5: Ho 0.286, Te 0.714_ | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 1, p. 2, row 5; `ORC-2NXJLZQJD2.e0c424` | | | Lattice a | 4.41 Å | 298.15 | Ho2Te5; _alloy: Ho 0.285714, Te 0.714286_ | experimental | [2] Cui 2023; _cites Yarembash 1974_ | Table 1, p. 2, row 20; `ORC-D7M5GMZAD7.2a1fcf` | | | Lattice a | 6.07 Å | 298.15 | HoTe; _alloy: Ho 0.5, Te 0.5_ | experimental | [2] Cui 2023; _cites Brixner 1960_ [doi](https://doi.org/10.1016/0022-1902%2860%2980038-3) | Table 1, p. 2, row 19; `ORC-PGE7X4AEHT` | | | Lattice a | 4.29 Å | 298.15 | HoTe3; _alloy: Ho 0.25, Te 0.75_ | unspecified | [2] Cui 2023; _cites Slovyanskikh 1985_ | Table 1, p. 2, row 21; `ORC-MJBVVRGJ2M.88a1fd` | | | Lattice a | 4.273 Å | 298.15 | HoTe3; _HoTe3: Ho 0.25, Te 0.75_ | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 1, p. 2, row 7; `ORC-RJ5RVZX3W7.a50343` | | | Lattice b | 43.964 Å | 0 | Ho2Te5; _Ho2Te5: Ho 0.286, Te 0.714_ | DFT | [1] Ghamri 2013 | Table 1, p. 2, row 6; `ORC-KCATGVXNKV.af85d2` | | | Lattice b | 45.03 Å | 298.15 | Ho2Te5; _Ho2Te5: Ho 0.286, Te 0.714_ | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 1, p. 2, row 5; `ORC-2NXJLZQJD2.4da2c9` | | | Lattice b | 45.03 Å | 298.15 | Ho2Te5; _alloy: Ho 0.285714, Te 0.714286_ | experimental | [2] Cui 2023; _cites Yarembash 1974_ | Table 1, p. 2, row 20; `ORC-D7M5GMZAD7.e02538` | | | Lattice b | 25.4 Å | 298.15 | HoTe3; _alloy: Ho 0.25, Te 0.75_ | unspecified | [2] Cui 2023; _cites Slovyanskikh 1985_ | Table 1, p. 2, row 21; `ORC-MJBVVRGJ2M.c50f23` | | | Lattice b | 24.87 Å | 298.15 | HoTe3; _HoTe3: Ho 0.25, Te 0.75_ | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 1, p. 2, row 7; `ORC-RJ5RVZX3W7.074ba3` | | | Lattice c | 4.621 Å | 0 | Ho2Te5; _Ho2Te5: Ho 0.286, Te 0.714_ | DFT | [1] Ghamri 2013 | Table 1, p. 2, row 6; `ORC-KCATGVXNKV.b2be31` | | | Lattice c | 4.411 Å | 298.15 | Ho2Te5; _Ho2Te5: Ho 0.286, Te 0.714_ | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 1, p. 2, row 5; `ORC-2NXJLZQJD2.ae191b` | | | Lattice c | 4.41 Å | 298.15 | Ho2Te5; _alloy: Ho 0.285714, Te 0.714286_ | experimental | [2] Cui 2023; _cites Yarembash 1974_ | Table 1, p. 2, row 20; `ORC-D7M5GMZAD7.307acf` | | | Lattice c | 4.29 Å | 298.15 | HoTe3; _alloy: Ho 0.25, Te 0.75_ | unspecified | [2] Cui 2023; _cites Slovyanskikh 1985_ | Table 1, p. 2, row 21; `ORC-MJBVVRGJ2M.b00176` | | | Lattice c | 4.273 Å | 298.15 | HoTe3; _HoTe3: Ho 0.25, Te 0.75_ | experimental | [1] Ghamri 2013; _cites Yarembash 1974_ | Table 1, p. 2, row 7; `ORC-RJ5RVZX3W7.9ba369` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. H. Ghamri, A. Belgacem-Bouzida, Y. Djaballah, A. Hidoussi, Thermodynamic assessment of the Ho–Te system supported by ab initio calculations, Journal of Alloys and Compounds 552, 387-391 (2013). [doi:10.1016/j.jallcom.2012.11.084](https://doi.org/10.1016/j.jallcom.2012.11.084) 2. Dongyu Cui, Jiong Wang, Jiaqiang Zhou, Thermodynamic Modeling of the Te-X (X = Gd, Dy, Ho) Binary Systems Combined with the First-Principles Method, J. Phase Equilib. Diffus. 44, 456-467 (2023). [doi:10.1007/s11669-023-01051-1](https://doi.org/10.1007/s11669-023-01051-1) ## 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/).