# Pu–O system > Pu–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/PU-O.html · Markdown: https://data.orchid-project.org/systems/PU-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/#PU-O/PuO-08Gue.json) · [Markdown](https://data.orchid-project.org/systems/PU-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 | |---|---|---|---| | PuO-08Gue.tdb | E. Gueneau, C. Chatillon, B. Sundman, J. Nucl. Mater., 378, 257-72(2008). [doi:10.1016/j.jnucmat.2008.06.013](https://doi.org/10.1016/j.jnucmat.2008.06.013) | `8750a98340781a5df8a680fd9b6dc64e52514132b9804d8da44768c4308a6088` | [viewer](https://orchid-project.org/phase-diagrams/#PU-O/PuO-08Gue.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/PuO-08Gue.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/PuO-08Gue.json) | | PuO-11Gue.tdb | C. Gueneau, N. Dupin, B. Sundman, C. Martial, J.-C. Dumas, S. Gosse, S. Chatain, F. De Bruycker, D. Manara, R.J.M. Konings, J. Nucl. Mater., 419, 145-67(2011). [doi:10.1016/j.jnucmat.2011.07.033](https://doi.org/10.1016/j.jnucmat.2011.07.033) | `15a7df38baf15590a30dc27cc69db048cc618a4c2ca44cdd00aed6bf7b3d7c05` | [viewer](https://orchid-project.org/phase-diagrams/#PU-O/PuO-11Gue.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/PuO-11Gue.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/PuO-11Gue.json) | | PuO-23Fou.tdb | P. Fouquet-Metivier, P.M. Martin, D. Manara, K. Dardenne, J. Rothe, P.C.M. Fossati, C. Gueneau, Calphad, 80, 102523(2023). [doi:10.1016/j.calphad.2022.102523](https://doi.org/10.1016/j.calphad.2022.102523) | `fa82e84a7efa72165f042d19b8f4e4f557412bb165e5dc25b43db980e1334390` | [viewer](https://orchid-project.org/phase-diagrams/#PU-O/PuO-23Fou.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/PuO-23Fou.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/PuO-23Fou.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | PuO-08Gue.tdb | 2639.34 | PUO2_C1 (x(O) 0.66519) + ION (x(O) 0.6682) + GAS (x(O) 0.99975) | | PuO-08Gue.tdb | 987.26 | PUO161_D53 (x(O) 0.63212) + PUO2_C1#2 (x(O) 0.63813) + PUO2_C1 (x(O) 0.66181) | | PuO-08Gue.tdb | 576.26 | PUO152_D53 (x(O) 0.60317) + PUO161_D53 (x(O) 0.6184) + PUO2_C1 (x(O) 0.66624) | | PuO-08Gue.tdb | 397.62 | ALPHA_PU (x(O) 0) + BETA_PU (x(O) 0) + PU2O3_D52 (x(O) 0.6) | | PuO-11Gue.tdb | 2992.72 | PUO2_C1 (x(O) 0.66343) + ION (x(O) 0.66594) + GAS (x(O) 0.99619) | | PuO-11Gue.tdb | 890.44 | PUO161_D53 (x(O) 0.63068) + PUO2_C1#2 (x(O) 0.63718) + PUO2_C1 (x(O) 0.66069) | | PuO-11Gue.tdb | 572.47 | PUO152_D53 (x(O) 0.60317) + PUO161_D53 (x(O) 0.61821) + PUO2_C1 (x(O) 0.66614) | | PuO-23Fou.tdb | 3032.58 | PUO2_C1 (x(O) 0.66309) + ION (x(O) 0.66554) + GAS (x(O) 0.99486) | | PuO-23Fou.tdb | 890.44 | PUO161_D53 (x(O) 0.63068) + PUO2_C1#2 (x(O) 0.63718) + PUO2_C1 (x(O) 0.66069) | | PuO-23Fou.tdb | 572.47 | PUO152_D53 (x(O) 0.60317) + PUO161_D53 (x(O) 0.61821) + PUO2_C1 (x(O) 0.66614) | ## 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/).