# Pt system > Pt system: 14 accepted literature values (crystal structure 10, formation 2, invariant reaction 2) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/PT.html · Markdown: https://data.orchid-project.org/systems/PT.md 14 accepted literature values from 6 paper(s) (experimental 4, model 7, DFT 3); 0 calculated phase diagram(s). Data: [JSON](https://data.orchid-project.org/literature/systems/PT.json) · [CSV](https://data.orchid-project.org/systems/PT.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#PT) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/PT.html) · [Markdown](https://data.orchid-project.org/systems/PT.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 4 | | model | 7 | | DFT | 3 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 2 | | formation | 2 | | crystal structure | 10 | ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the Pt system (2) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 2042.15 | congruent melting: L -> (Pt) | L: Pt 1; (Pt): Pt 1 | experimental | [1] Wang 2008; _cites Smith 1989_ | Table 5, p. 5, row 21; `ORC-2CN6T72VQO` | | | 2042.15 | congruent melting: L -> (Pt) | L: Pt 1; (Pt): Pt 1 | model | [1] Wang 2008 | Table 5, p. 5, row 22; `ORC-MN7UEM5WJL` | | ## 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, Pt system (2) | Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote | |---|---|---:|---:|---|---:|---:|---|---|---| | A15 | | 24.663 kJ/mol (basis unstated) | 0 | model | | | [2] Fiorani 2024 | Table 5, p. 21, row 22; `ORC-Y2CZAGTW5H` | | | A15 | | 24.663 kJ/mol (basis unstated) | 0 | DFT | | | [2] Fiorani 2024 | Table 5, p. 21, row 21; `ORC-ZKHLZH2VGK` | | ## Other properties ### Crystal structure (10) Table: Crystal structure, Pt system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Lattice a | 3.97 Å | | Pt; _alloy: Pt 1_ | model | [3] Long 2009; _cites Haglund 1993_ [doi](https://doi.org/10.1103/physrevb.48.11685) | Table 1, p. 2, row 3; `ORC-HBADJ75DVW` | | | Lattice a | 3.9854 Å | 0 | Pt; _alloy: Pt 1_ | DFT | [3] Long 2009 | Table 1, p. 2, row 1; `ORC-MFFS3RYO4X` | | | Lattice a | 3.985 Å | | Pt; _alloy: Pt 1_ | model | [3] Long 2009; _cites Wang 2004_ [doi](https://doi.org/10.1016/j.calphad.2004.05.002) | Table 1, p. 2, row 2; `ORC-SV7TKIGFDW` | | | Lattice a | 3.923 Å | | fcc; _alloy: Pt 1_ | model | [4] Kim 2011 | Table 1, p. 2, row 12; `ORC-3GNI5RXPNO` | | | Lattice a | 3.964 Å | | fcc; _alloy: Pt 1_ | model | [4] Kim 2011 | Table 1, p. 2, row 10; `ORC-BWFDKQ36EJ` | | | Lattice a | 3.985 Å | | fcc; _alloy: Pt 1_ | model | [4] Kim 2011 | Table 1, p. 2, row 11; `ORC-I5LDEJYYSS` | | | Lattice a | 3.913 Å | 1403.15 | (Pt); _(Pt): Pt 1_ | experimental | [5] Karakaya 1987; _cites ref. 43Sch_ | Table 4, p. 4, row 9; `ORC-JSILAMNBID.c52810` | | | lattice unspecified axis | 3.913 Å | 1403.15 | (Pt); _(Pt): Pt 1_ | experimental | [5] Karakaya 1987; _cites ref. 43Sch_ | Table 4, p. 4, row 9; `ORC-JSILAMNBID.d4f47d` | | | lattice v | 15.5927 Å3/atom | 0 | Pt | DFT | [6] Guo 2015 | Table I, p. 3, row 1; `ORC-SFNVBQUBSR` | | | lattice v | 15.09 Å3/atom | | Pt | experimental | [6] Guo 2015; _cites Perdew 1996_ [doi](https://doi.org/10.1103/physrevlett.77.3865) | Table I, p. 3, row 2; `ORC-Y6RLDJSXKM` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. C.P. Wang, A.Q. Zheng, X.J. Liu, Thermodynamic assessments of the V–Ge and V–Pt systems, Intermetallics 16, 544-549 (2008). [doi:10.1016/j.intermet.2008.01.002](https://doi.org/10.1016/j.intermet.2008.01.002) 2. J.-M. Fiorani, M. Siblani, J.-M. Joubert, C. Barreteau, J.-C. Crivello, N. David et al., Thermodynamic modeling of the Mo–Pt system based on the NACEF approach, Calphad 84, 102665 (2024). [doi:10.1016/j.calphad.2024.102665](https://doi.org/10.1016/j.calphad.2024.102665) 3. Z. H. Long, X. M. Tao, H. S. Liu, Z. P. Jin, First-Principle Calculation Assisted Thermodynamic Assessment of the Pt-Pb System, J. Phase Equilib. Diffus. 30, 318-322 (2009). [doi:10.1007/s11669-009-9530-1](https://doi.org/10.1007/s11669-009-9530-1) 4. DongEung Kim, James E. Saal, Liangcai Zhou, ShunLi Shang, Yong Du, Zi-Kui Liu, Thermodynamic modeling of fcc order/disorder transformations in the Co–Pt system, Calphad 35, 323-330 (2011). [doi:10.1016/j.calphad.2011.04.005](https://doi.org/10.1016/j.calphad.2011.04.005) 5. I. Karakaya, W. T. Thompson, The Ag-Pt (Silver-Platinum) system, Bulletin of Alloy Phase Diagrams 8, 334-340 (1987). [doi:10.1007/bf02869269](https://doi.org/10.1007/bf02869269) 6. Cuiping Guo, Liang Huang, Changrong Li, Shunli Shang, Zhenmin Du, Thermodynamic Modeling of the Pt-Te and Pt-Sb-Te Systems, Journal of Elec Materi 44, 2638-2650 (2015). [doi:10.1007/s11664-015-3676-x](https://doi.org/10.1007/s11664-015-3676-x) ## 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 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_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/).