NiPt: enthalpy of formation

9 accepted literature formation-enthalpy value(s) (experimental 2, model 1, DFT 6); experimental median -9.27 kJ/mol-atom (n = 2); Materials Project -9.177 kJ/mol-atom (mp-aaaaabkj); OQMD -9.756 kJ/mol-atom (oqmd-17788).

Systems: Ni–Pt

Literature values

Enthalpy of formation of NiPt reported in the literature (9)
Value	Phase as printed	T (K)	Class	Method	System	Source	Location
-9.27 kJ/mol-atom	NiPt–L10	298.15	experimental	Experiment [20]	Ni–Pt	[1] Lu 2009 cites Hultgren 1973	Table 1, p. 3, row 15 report
-9.27 kJ/mol-atom	NiPt	298.15	experimental		Ni–Pt	[2] Kim 2011 cites Walker 1970 doi	Table 4, p. 4, row 13 report
-13.5 kJ/mol-atom	NiPt–L10	0	model	Assessment (this work)	Ni–Pt	[1] Lu 2009	Table 1, p. 3, row 13 report
-11.76 kJ/mol-atom	NiPt–L10	0	DFT	LMTO + CPA [19]	Ni–Pt	[1] Lu 2009 cites Ruban 1995 doi	Table 1, p. 3, row 6 report
-11.42 kJ/mol-atom	NiPt–L10	0	DFT	FLMTO + CWM [17]	Ni–Pt	[1] Lu 2009 cites Amador 1993 doi	Table 1, p. 3, row 2 report
-9.23 kJ/mol-atom	NiPt–L10	0	DFT	LAPW [18]	Ni–Pt	[1] Lu 2009 cites Lu 1993 doi	Table 1, p. 3, row 4 report
-8.98 kJ/mol-atom	NiPt–L10	0	DFT	VASP (relaxed value)	Ni–Pt	[1] Lu 2009	Table 1, p. 3, row 11 report
-8.98 kJ/mol-atom	NiPt	0	DFT	VASP (relaxation)	Ni–Pt	[2] Kim 2011 cites Lu 2009 doi	Table 4, p. 4, row 12 report
-7.64 kJ/mol-atom	NiPt–L10	0	DFT	VASP (no relaxation)	Ni–Pt	[1] Lu 2009	Table 1, p. 3, row 9 report

Uncertainty budget

Components kept separate, in the value's unit (literature SCHEMA.md, UNCERTAINTY_CALIBRATION.md): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.

Uncertainty budget of the literature values of NiPt
Value	Unit	Reading	Method (class, basis)	Effective
-9.27	kJ/mol-atom	0.005	4.1 (experimental_unspecified, cleaned_below_threshold)	4.1
-9.27	kJ/mol-atom	0.005	3.5 (unknown, calibrated)	3.5
-13.5	kJ/mol-atom	0.05	3.9 (model_calculated, calibrated)	3.9
-11.76	kJ/mol-atom	0.005	3.929 (dft, calibrated)	3.929
-11.42	kJ/mol-atom	0.005	3.929 (dft, calibrated)	3.929
-9.23	kJ/mol-atom	0.005	3.929 (dft, calibrated)	3.929
-8.98	kJ/mol-atom	0.005	3.929 (dft, calibrated)	3.929
-8.98	kJ/mol-atom	0.005	3.929 (dft, calibrated)	3.929
-7.64	kJ/mol-atom	0.005	3.929 (dft, calibrated)	3.929

DFT formation energies

Lowest-energy entries at this composition. Materials Project and OQMD use different energy references and are never averaged. 1 eV/atom = 96.485 kJ/mol-atom.

DFT formation energy of NiPt
Source	Entry	kJ/mol-atom	eV/atom	Space group	E above hull (kJ/mol-atom)	E above hull (eV/atom)	Theoretical
Materials Project	mp-aaaaabkj	-9.177	-0.095116	P4/mmm	0	0	no
OQMD	oqmd-17788	-9.756	-0.101117	P4/mmm	0	0	no

DFT sources: A. Jain et al., Commentary: The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002. doi:10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501-1509; S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010. doi:10.1007/s11837-013-0755-4 (CC BY 4.0);

Sources

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
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

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). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Parity: DFT-vs-experiment formation-enthalpy benchmark (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735943
R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi: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); 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); G. Kim, S. V. Meschel, P. Nash, W. Chen, Experimental formation enthalpies for intermetallic phases and other inorganic compounds, Scientific Data 4 (2017) 170162, https://doi.org/10.1038/sdata.2017.162; 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. 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.

@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_dft_benchmark_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Parity: DFT-vs-experiment formation-enthalpy benchmark}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735943},
  url       = {https://doi.org/10.5281/zenodo.23735943},
  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}
}