DyB2: enthalpy of formation

5 accepted literature formation-enthalpy value(s) (experimental 1, model 1, DFT 3); experimental median -30.2 kJ/mol-atom (n = 1); Materials Project -54.16 kJ/mol-atom (mp-aaaaadbd); OQMD -54.212 kJ/mol-atom (oqmd-8332).

Systems: B–Dy

Literature values

Enthalpy of formation of DyB2 reported in the literature (5)
Value	Phase as printed	T (K)	Class	Method	System	Source	Location
-30.2 kJ/mol-atom ± 1.3	DyB2	298.15	experimental	Experiments	B–Dy	[1] Li 2020 cites ref. 37	Table 2, p. 25, row 14 report
-58.019 kJ/mol-atom	DyB2	298.15	model	Optimization	B–Dy	[1] Li 2020	Table 2, p. 25, row 18 report
-54.44 kJ/mol-atom	DyB2	298.15	DFT	first-principles calculation	B–Dy	[1] Li 2020 cites ref. 38	Table 2, p. 25, row 15 report
-54.135 kJ/mol-atom	DyB2	298.15	DFT	First-principle calculation	B–Dy	[1] Li 2020 cites ref. 30	Table 2, p. 25, row 16 report
-54.038 kJ/mol-atom	DyB2	298.15	DFT	First-principle calculation	B–Dy	[1] Li 2020 cites ref. 31	Table 2, p. 25, row 17 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 DyB2
Value	Unit	Printed	Reading	Method (class, basis)	Effective
-30.2	kJ/mol-atom	1.3	0.05	4.1 (experimental_unspecified, cleaned_below_threshold)	4.1
-58.019	kJ/mol-atom		5.000e-4	3.9 (model_calculated, calibrated)	3.9
-54.44	kJ/mol-atom		0.005	9.966 (dft, calibrated)	9.966
-54.135	kJ/mol-atom		5.000e-4	9.966 (dft, calibrated)	9.966
-54.038	kJ/mol-atom		5.000e-4	9.966 (dft, calibrated)	9.966

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 DyB2
Source	Entry	kJ/mol-atom	eV/atom	Space group	E above hull (kJ/mol-atom)	E above hull (eV/atom)	Theoretical
Materials Project	mp-aaaaadbd	-54.16	-0.561336	P6/mmm	0	0	no
OQMD	oqmd-8332	-54.212	-0.56187	P6/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

S. Li, M.H. Rong, L. Xu, Q. Wei, J. Wang, G.H. Rao et al., Thermodynamic assessment of the RE-B (RE = Ce, Dy, Lu) binary systems, Calphad 68, 101740 (2020). doi:10.1016/j.calphad.2020.101740

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}
}