# Ta–O system > Ta–O system: 0 accepted literature values (none) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/TA-O.html · Markdown: https://data.orchid-project.org/systems/TA-O.md 0 accepted literature values from 0 paper(s); 3 calculated phase diagram(s). Data: [interactive phase diagram](https://orchid-project.org/phase-diagrams/#TA-O/TaO-22Geb.json) · [Markdown](https://data.orchid-project.org/systems/TA-O.md) ## 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 | |---|---|---|---| | TaO-22Geb.tdb | J. Gebauer, P. Franke, H.J. Seifert, Adv. Eng. Mater., 24, 2200162(2022). [doi:10.1002/adem.202200162](https://doi.org/10.1002/adem.202200162) | `886665f3a1ed281c92719e281b5247ade935ba1773cf312fa01e4d2de8168932` | [viewer](https://orchid-project.org/phase-diagrams/#TA-O/TaO-22Geb.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/TaO-22Geb.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/TaO-22Geb.json) | | TaO-22Mei-ass.tdb | K.J. Meisner, R. Zaman, B.-C. Zhou, Calphad, 76, 102391(2022). [doi:10.1016/j.calphad.2022.102391](https://doi.org/10.1016/j.calphad.2022.102391) | `50b2e3a96e3d3b0adfab3aacebc20d09951478f5c844fbdcf7db18813f66796a` | [viewer](https://orchid-project.org/phase-diagrams/#TA-O/TaO-22Mei-ass.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/TaO-22Mei-ass.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/TaO-22Mei-ass.json) | | TaO-22Mei-ion.tdb | K.J. Meisner, R. Zaman, B.-C. Zhou, Calphad, 76, 102391(2022). [doi:10.1016/j.calphad.2022.102391](https://doi.org/10.1016/j.calphad.2022.102391) | `88e6b32a585417593d2a462622bfaa268565f551f208ca1fc11f1ec3eec9850f` | [viewer](https://orchid-project.org/phase-diagrams/#TA-O/TaO-22Mei-ion.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/TaO-22Mei-ion.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/TaO-22Mei-ion.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | TaO-22Geb.tdb | 2153 | BCC_A2 (x(O) 0.04874) + ION#2 (x(O) 0.34244) + ION (x(O) 0.64856) | | TaO-22Geb.tdb | 2144.99 | ION (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) + O2GAS (x(O) 1) | | TaO-22Geb.tdb | 1823 | BCC_A2 (x(O) 0.0495) + ION (x(O) 0.68044) + TA2O5_HT (x(O) 0.71429) | | TaO-22Geb.tdb | 1593.01 | BCC_A2 (x(O) 0.04113) + TA2O5_LT (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) | | TaO-22Geb.tdb | 1593.01 | TA2O5_LT (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) + O2GAS (x(O) 1) | | TaO-22Mei-ass.tdb | 2193.15 | BCC_A2 (x(O) 0.05104) + LIQUID#2 (x(O) 0.27566) + LIQUID (x(O) 0.58075) | | TaO-22Mei-ass.tdb | 2152.5 | TA2O5_HT (x(O) 0.71429) + LIQUID (x(O) 0.7154) + O2GAS (x(O) 1) | | TaO-22Mei-ass.tdb | 1914.25 | BCC_A2 (x(O) 0.05535) + LIQUID (x(O) 0.60278) + TA2O5_HT (x(O) 0.71429) | | TaO-22Mei-ass.tdb | 1592.88 | BCC_A2 (x(O) 0.04313) + TA2O5_LT (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) | | TaO-22Mei-ass.tdb | 1592.88 | TA2O5_LT (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) + O2GAS (x(O) 1) | | TaO-22Mei-ion.tdb | 2169.22 | ION (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) + O2GAS (x(O) 1) | | TaO-22Mei-ion.tdb | 2011.24 | BCC_A2 (x(O) 0.05113) + ION#2 (x(O) 0.29261) + ION (x(O) 0.5861) | | TaO-22Mei-ion.tdb | 1787.58 | BCC_A2 (x(O) 0.04767) + ION (x(O) 0.61268) + TA2O5_HT (x(O) 0.71429) | | TaO-22Mei-ion.tdb | 1592.88 | BCC_A2 (x(O) 0.04067) + TA2O5_LT (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) | | TaO-22Mei-ion.tdb | 1592.88 | TA2O5_LT (x(O) 0.71429) + TA2O5_HT (x(O) 0.71429) + O2GAS (x(O) 1) | ## Please cite - 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 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 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; the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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_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_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/).