# Ni–Pt system > Ni–Pt system: 24 accepted literature values (formation 17, crystal structure 6, mixing / partial 1) and 1 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/NI-PT.html · Markdown: https://data.orchid-project.org/systems/NI-PT.md 24 accepted literature values from 2 paper(s) (experimental 4, model 4, DFT 16); 1 calculated phase diagram(s). 2 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/NI-PT.json) · [CSV](https://data.orchid-project.org/systems/NI-PT.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#NI-PT) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#NI-PT/NiPt-09Lu.json) · [phases (6)](https://data.orchid-project.org/phases/pages/NI-PT.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/NI-PT.html) · [Markdown](https://data.orchid-project.org/systems/NI-PT.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 4 | | model | 4 | | DFT | 16 | Table: Accepted values by property group | Property group | Values | |---|---:| | formation | 17 | | mixing / partial | 1 | | crystal structure | 6 | ## 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 | |---|---|---|---| | NiPt-09Lu.tdb | X.-G. Lu, B. Sundman, J. Agren, Calphad, 33, 450-56(2009). [doi:10.1016/j.calphad.2009.06.002](https://doi.org/10.1016/j.calphad.2009.06.002) | `fe66306490091640c906c52aced3068bff59ed287a8c015a506cc175bdc3a53b` | [viewer](https://orchid-project.org/phase-diagrams/#NI-PT/NiPt-09Lu.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/NiPt-09Lu.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/NiPt-09Lu.json) | Table: Calculated three-phase invariants (model, mole fraction of the second component) | TDB file | T (K) | Phases at the invariant | |---|---:|---| | NiPt-09Lu.tdb | 850.27 | FCC_4SL#2 (x(Pt) 0.39125) + FCC_A1 (x(Pt) 0.39443) + FCC_4SL (x(Pt) 0.41833) | | NiPt-09Lu.tdb | 850.27 | FCC_4SL#2 (x(Pt) 0.39125) + FCC_A1 (x(Pt) 0.39443) + FCC_4SL (x(Pt) 0.41833) | | NiPt-09Lu.tdb | 850.27 | FCC_4SL#2 (x(Pt) 0.39125) + FCC_A1 (x(Pt) 0.39443) + FCC_4SL (x(Pt) 0.41833) | | NiPt-09Lu.tdb | 850.27 | FCC_4SL (x(Pt) 0.39125) + FCC_A1 (x(Pt) 0.39443) + FCC_4SL#2 (x(Pt) 0.41833) | | NiPt-09Lu.tdb | 785.87 | FCC_4SL#3 (x(Pt) 0.58696) + FCC_4SL (x(Pt) 0.63305) + FCC_4SL#2 (x(Pt) 0.63305) | | NiPt-09Lu.tdb | 782.99 | FCC_4SL#2 (x(Pt) 0.58831) + FCC_4SL (x(Pt) 0.63305) + FCC_4SL#3 (x(Pt) 0.63466) | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/NI/NI-PT.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/NI/NI-PT.json) ## 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, Ni–Pt system (17) | Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote | |---|---|---:|---:|---|---:|---:|---|---|---| | Ni3Pt–L12 | [Ni3Pt](https://data.orchid-project.org/compounds/Ni3Pt.html) | -10.9 kJ/mol-atom | 0 | model | -6.691 (mp-aaaaasyg) | -7.337 (oqmd-19455) | [1] Lu 2009 | Table 1, p. 3, row 12; `ORC-2F23673K6C` | | | Ni3Pt–L12 | | -8.75 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009; _cites Ruban 1995_ [doi](https://doi.org/10.1103/physrevb.51.12958) | Table 1, p. 3, row 5; `ORC-33PBBL25JY` | | | Ni3Pt–L12 | | -8.27 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009; _cites Amador 1993_ [doi](https://doi.org/10.1103/physrevb.47.15276) | Table 1, p. 3, row 1; `ORC-PJMT3DXI32` | | | Ni3Pt–L12 | | -6.57 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009 | Table 1, p. 3, row 8; `ORC-X7RIOHTHF6` | | | NiPt | [NiPt](https://data.orchid-project.org/compounds/NiPt.html) | -9.27 kJ/mol-atom | 298.15 | experimental | -9.177 (mp-aaaaabkj) | -9.756 (oqmd-17788) | [2] Kim 2011; _cites Walker 1970_ [doi](https://doi.org/10.1016/0001-6160%2870%2990156-2) | Table 4, p. 4, row 13; `ORC-QHCJDNTPZ4` | | | NiPt | | -8.98 kJ/mol-atom | 0 | DFT | | | [2] Kim 2011; _cites Lu 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.06.002) | Table 4, p. 4, row 12; `ORC-TJTQXRTTEQ` | | | NiPt3–L12 | | -11.98 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009; _cites Ruban 1995_ [doi](https://doi.org/10.1103/physrevb.51.12958) | Table 1, p. 3, row 7; `ORC-GATTDLS2KR` | | | NiPt3–L12 | | -8.4 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009; _cites Amador 1993_ [doi](https://doi.org/10.1103/physrevb.47.15276) | Table 1, p. 3, row 3; `ORC-JGV54NYGX5` | | | NiPt3–L12 | [NiPt3](https://data.orchid-project.org/compounds/NiPt3.html) | -8.3 kJ/mol-atom | 0 | model | -6.12 (mp-aaacpmpx) | -6.845 (oqmd-347552) | [1] Lu 2009 | Table 1, p. 3, row 14; `ORC-TTC6P3CHHO` | | | NiPt3–L12 | | -6.31 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009 | Table 1, p. 3, row 10; `ORC-YPLN6GXWBG` | | | NiPt–L10 | [NiPt](https://data.orchid-project.org/compounds/NiPt.html) | -13.5 kJ/mol-atom | 0 | model | -9.177 (mp-aaaaabkj) | -9.756 (oqmd-17788) | [1] Lu 2009 | Table 1, p. 3, row 13; `ORC-PHHTK7642F` | | | NiPt–L10 | | -11.76 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009; _cites Ruban 1995_ [doi](https://doi.org/10.1103/physrevb.51.12958) | Table 1, p. 3, row 6; `ORC-GHAU4UCNYB` | | | NiPt–L10 | | -11.42 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009; _cites Amador 1993_ [doi](https://doi.org/10.1103/physrevb.47.15276) | Table 1, p. 3, row 2; `ORC-5HFJNYGJHS` | | | NiPt–L10 | [NiPt](https://data.orchid-project.org/compounds/NiPt.html) | -9.27 kJ/mol-atom | 298.15 | experimental | -9.177 (mp-aaaaabkj) | -9.756 (oqmd-17788) | [1] Lu 2009; _cites Hultgren 1973_ | Table 1, p. 3, row 15; `ORC-EZRR4E25UL` | | | NiPt–L10 | | -9.23 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009; _cites Lu 1993_ [doi](https://doi.org/10.1209/0295-5075/21/2/017) | Table 1, p. 3, row 4; `ORC-EN3DMN46TV` | | | NiPt–L10 | | -8.98 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009 | Table 1, p. 3, row 11; `ORC-EH5UTTYPNO` | | | NiPt–L10 | | -7.64 kJ/mol-atom | 0 | DFT | | | [1] Lu 2009 | Table 1, p. 3, row 9; `ORC-EY6RZ5VUHV` | | ## Other properties ### Mixing / partial (1) Table: Mixing / partial, Ni–Pt system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Enthalpy of mixing; _printed: ΔHmix_ | -7.643 kJ/mol-atom | 300 | Ni3Pt; _alloy: Pt 0.25_ | model | [2] Kim 2011; _cites Lu 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.06.002) | Table 4, p. 4, row 14; `ORC-JOO4OJA5QY` | | ### Crystal structure (6) Table: Crystal structure, Ni–Pt system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Lattice a; _printed: a_ | 3.659 Å | | Ni3Pt; _alloy: Pt 0.25_ | DFT | [2] Kim 2011 | Table 4, p. 4, row 1; `ORC-PXT3VQMXPM.13c23b` | | | Lattice a; _printed: a_ | 3.844 Å | | NiPt; _alloy: Pt 0.5_ | DFT | [2] Kim 2011 | Table 4, p. 4, row 1; `ORC-PXT3VQMXPM.8d4aa5` | | | Lattice a; _printed: a_ | 3.873 Å | | NiPt; _alloy: Pt 0.5_ | experimental | [2] Kim 2011; _cites Esch 1944_ | Table 4, p. 4, row 2; `ORC-UQOKJ4NKDP` | | | Lattice a; _printed: a_ | 3.88 Å | | NiPt3; _alloy: Pt 0.75_ | DFT | [2] Kim 2011 | Table 4, p. 4, row 1; `ORC-PXT3VQMXPM.602221` | | | Lattice c; _printed: c_ | 3.589 Å | | NiPt; _alloy: Pt 0.5_ | experimental | [2] Kim 2011; _cites Esch 1944_ | Table 4, p. 4, row 4; `ORC-X4VNVF4ENN` | | | Lattice c; _printed: c_ | 3.625 Å | | NiPt; _alloy: Pt 0.5_ | DFT | [2] Kim 2011 | Table 4, p. 4, row 3; `ORC-ZBEUROCPAF` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. Xiao-Gang Lu, Bo Sundman, John A˚gren, Thermodynamic assessments of the Ni–Pt and Al–Ni–Pt systems, Calphad 33, 450-456 (2009). [doi:10.1016/j.calphad.2009.06.002](https://doi.org/10.1016/j.calphad.2009.06.002) 2. 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) ## 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/).