Er2Te3: enthalpy of formation

7 accepted literature formation-enthalpy value(s) (experimental 2, model 2, DFT 3); experimental median -161.53 kJ/mol-atom (n = 2); Materials Project -158.255 kJ/mol-atom (mp-aaaaavrf); OQMD -134.147 kJ/mol-atom (oqmd-665800).

Systems: Er–Te

Literature values

Enthalpy of formation of Er2Te3 reported in the literature (7)
Value	Phase as printed	T (K)	Class	Method	System	Source	Location
-164.44 kJ/mol-atom ± 16.7	Er2Te3	298.15	experimental	EMF	Er–Te	[1] Bennoui 2022 cites Vassiliev 1980	Table 2, p. 5, row 34 report
-158.62 kJ/mol-atom ± 2.5	Er2Te3	298.15	experimental	EMF	Er–Te	[1] Bennoui 2022 cites Imamaliyeva 2020 doi	Table 2, p. 5, row 35 report
-159.1 kJ/mol-atom ± 10	Er2Te3		model	Predicted	Er–Te	[1] Bennoui 2022 cites Vassiliev 2016 doi	Table 2, p. 5, row 33 report
-136.475 kJ/mol-atom	Er2Te3		model	CALPHAD	Er–Te	[1] Bennoui 2022	Table 2, p. 5, row 30 report
-157.965 kJ/mol-atom	Er2Te3	0	DFT	DFT	Er–Te	[1] Bennoui 2022 cites Jain 2013 doi	Table 2, p. 5, row 32 report
-133.951 kJ/mol-atom	Er2Te3	0	DFT	DFT	Er–Te	[1] Bennoui 2022 cites Kirklin 2015 doi	Table 2, p. 5, row 31 report
-133.731 kJ/mol-atom	Er2Te3	0	DFT	DFT	Er–Te	[1] Bennoui 2022	Table 2, p. 5, row 29 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 Er2Te3
Value	Unit	Printed	Reading	Method (class, basis)	Effective
-164.44	kJ/mol-atom	16.7	0.005	4.6 (emf, cleaned_below_threshold)	16.7
-158.62	kJ/mol-atom	2.5	0.005	4.6 (emf, cleaned_below_threshold)	4.6
-159.1	kJ/mol-atom	10	0.05	3.9 (model_calculated, calibrated)	10
-136.475	kJ/mol-atom		5.000e-4	3.9 (model_calculated, calibrated)	3.9
-157.965	kJ/mol-atom		5.000e-4	9.966 (dft, calibrated)	9.966
-133.951	kJ/mol-atom		5.000e-4	9.966 (dft, calibrated)	9.966
-133.731	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 Er2Te3
Source	Entry	kJ/mol-atom	eV/atom	Space group	E above hull (kJ/mol-atom)	E above hull (eV/atom)	Theoretical
Materials Project	mp-aaaaavrf	-158.255	-1.64021	Fddd	0	0	no
OQMD	oqmd-665800	-134.147	-1.39034	Fddd	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. Bennoui, Y. Djaballah, V. Vassiliev, A. Belgacem-Bouzida, Thermodynamic Study of Er-Bi and Er-Te Systems by Combination of First-Principles Calculations and the CALPHAD Method, J. Phase Equilib. Diffus. 43, 126-138 (2022). doi:10.1007/s11669-022-00947-8

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}
}