Er–Te system

70 accepted literature values from 1 paper(s) (experimental 42, model 4, DFT 24); 1 calculated phase diagram(s). 1 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	42
model	4
DFT	24

Accepted values by property group
Property group	Values
invariant reaction	16
phase transition	9
formation	21
crystal structure	24

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.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
ErTe-22Ben.tdb	S. Bennoui, Y. Djaballah, V. Vassiliev, A. Belgacem-Bouzida, J. Phase Equilib. Diffus., 43, 126-38(2022). doi:10.1007/s11669-022-00947-8	`f2f2246d321ba2f9d67d4cff558e27fb59a6d0643cf094a02b3ba8914d27d9d5`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
ErTe-22Ben.tdb	1539.43	HCP_A3 (x(Te) 0) + LIQUID (x(Te) 0.18584) + ERTE_B1 (x(Te) 0.5)
ErTe-22Ben.tdb	1363.53	ERTE_B1 (x(Te) 0.5) + LIQUID (x(Te) 0.5512) + ER2TE3 (x(Te) 0.6)
ErTe-22Ben.tdb	953.4	ER2TE3 (x(Te) 0.6) + ERTE3 (x(Te) 0.75) + LIQUID (x(Te) 0.94623)
ErTe-22Ben.tdb	722.66	ERTE3 (x(Te) 0.75) + HEXAGONAL_A8 (x(Te) 1) + LIQUID (x(Te) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Er–Te system (16)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1551	eutectic		experimental	[1] Bennoui 2022	p. 2 report	The eutectic between Er and ErTe is given at 87 at.% Er and 1551 K, while the second eutectic on the Te-rich side is at about 3 at.% Er and 603 K (Fig. 2).
1543	eutectic: L -> ErTe+(Er)	L: Te 0.13; ErTe: Te 0.5; (Er): Te 0	experimental	[1] Bennoui 2022 cites Massalski 1990	Table 7, p. 10, row 19 report
1543	eutectic: L -> ErTe+(Er)	L: Te 0.13; ErTe: Te 0.5; (Er): Te 0	experimental	[1] Bennoui 2022 cites Haase 1965 doi	Table 7, p. 10, row 18 report
1540	eutectic: L -> ErTe+(Er)	L: Te 0.18; ErTe: Te 0.5; (Er): Te 0	experimental	[1] Bennoui 2022	Table 7, p. 10, row 17 report
1364	eutectic: L -> Er2Te3+ErTe	L: Te 0.55; Er2Te3: Te 0.6; ErTe: Te 0.5	experimental	[1] Bennoui 2022	Table 7, p. 10, row 10 report
1363	eutectic: L -> Er2Te3+ErTe	L: Te 0.56; Er2Te3: Te 0.6; ErTe: Te 0.5	experimental	[1] Bennoui 2022 cites Abrikosov 1973	Table 7, p. 10, row 11 report
1363	eutectic: L -> Er2Te3+ErTe	L: Te 0.56; Er2Te3: Te 0.6; ErTe: Te 0.5	experimental	[1] Bennoui 2022 cites Massalski 1990	Table 7, p. 10, row 12 report
957	peritectic		experimental	[1] Bennoui 2022	p. 2 report	While the ErTe3compound melts at 957 K with decomposition according to the peritectic reaction: Er2Te3 ? L$ ErTe3.
953	peritectic		experimental	[1] Bennoui 2022 cites Abrikosov 1973	p. 2 report	According to reference,[39] the ErTe3 phase does not exist; instead, the stoichiometric phase ErTe2, formed by a peritectic at 953 K, is indicated.
953	peritectic: L+ Er2Te3 -> ErTe3	L: Te 0.86; Er2Te3: Te 0.6; ErTe3: Te 0.75	experimental	[1] Bennoui 2022 cites Massalski 1990	Table 7, p. 10, row 6 report
953	peritectic: L+ Er2Te3 -> ErTe3	L: Te 0.95; Er2Te3: Te 0.6; ErTe3: Te 0.75	experimental	[1] Bennoui 2022	Table 7, p. 10, row 4 report
848	peritectic: L+ Er2Te3 -> ErTe3	L: Te 0.78; Er2Te3: Te 0.6; ErTe3: Te 0.75	experimental	[1] Bennoui 2022 cites Haase 1965 doi	Table 7, p. 10, row 5 report
722	eutectic: L -> (Te) +ErTe3	L: Te 0.999999; (Te): Te 1; ErTe3: Te 0.75	experimental	[1] Bennoui 2022	Table 7, p. 10, row 1 report
718	eutectic: L -> (Te) +ErTe3	L: Te 0.9956; (Te): Te 1; ErTe3: Te 0.75	experimental	[1] Bennoui 2022 cites Massalski 1990	Table 7, p. 10, row 3 report
718	eutectic: L -> (Te) +ErTe3	L: Te 0.9956; (Te): Te 1; ErTe3: Te 0.75	experimental	[1] Bennoui 2022 cites Abrikosov 1973	Table 7, p. 10, row 2 report
718	eutectic		experimental	[1] Bennoui 2022 cites Abrikosov 1973	p. 2 report	A degenerate eutectic exists between ErTe2 and Te at 718 K.

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.

Enthalpies of formation, Er–Te system (21)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Er2Te3	Er2Te3	-164.44 kJ/mol-atom ± 16.7	298.15	experimental	-158.255 (mp-aaaaavrf)	-134.147 (oqmd-665800)	[1] Bennoui 2022 cites Vassiliev 1980	Table 2, p. 5, row 34 report
Er2Te3	Er2Te3	-159.1 kJ/mol-atom ± 10		model	-158.255 (mp-aaaaavrf)	-134.147 (oqmd-665800)	[1] Bennoui 2022 cites Vassiliev 2016 doi	Table 2, p. 5, row 33 report
Er2Te3	Er2Te3	-158.62 kJ/mol-atom ± 2.5	298.15	experimental	-158.255 (mp-aaaaavrf)	-134.147 (oqmd-665800)	[1] Bennoui 2022 cites Imamaliyeva 2020 doi	Table 2, p. 5, row 35 report
Er2Te3		-157.965 kJ/mol-atom	0	DFT			[1] Bennoui 2022 cites Jain 2013 doi	Table 2, p. 5, row 32 report
Er2Te3	Er2Te3	-136.475 kJ/mol-atom		model	-158.255 (mp-aaaaavrf)	-134.147 (oqmd-665800)	[1] Bennoui 2022	Table 2, p. 5, row 30 report
Er2Te3		-133.951 kJ/mol-atom	0	DFT			[1] Bennoui 2022 cites Kirklin 2015 doi	Table 2, p. 5, row 31 report
Er2Te3		-133.731 kJ/mol-atom	0	DFT			[1] Bennoui 2022	Table 2, p. 5, row 29 report
ErTe	ErTe	-179.45 kJ/mol-atom ± 0.6	298.15	experimental	-136.706 (mp-aaaaabxg)	-120.964 (oqmd-1880751)	[1] Bennoui 2022 cites Imamaliyeva 2020 doi	Table 2, p. 5, row 40 report
ErTe	ErTe	-157 kJ/mol-atom ± 60	298.15	experimental	-136.706 (mp-aaaaabxg)	-120.964 (oqmd-1880751)	[1] Bennoui 2022 cites Mills 1974	Table 2, p. 5, row 41 report
ErTe		-136.485 kJ/mol-atom	0	DFT			[1] Bennoui 2022 cites Jain 2013 doi	Table 2, p. 5, row 39 report
ErTe		-119.399 kJ/mol-atom	0	DFT			[1] Bennoui 2022 cites Kirklin 2015 doi	Table 2, p. 5, row 38 report
ErTe	ErTe	-118.947 kJ/mol-atom		model	-136.706 (mp-aaaaabxg)	-120.964 (oqmd-1880751)	[1] Bennoui 2022	Table 2, p. 5, row 37 report
ErTe		-115.927 kJ/mol-atom	0	DFT			[1] Bennoui 2022	Table 2, p. 5, row 36 report
ErTe2		-132.921 kJ/mol-atom		DFT			[1] Bennoui 2022 cites Jain 2013 doi	Table 2, p. 5, row 44 report
ErTe2		-106.39 kJ/mol-atom		DFT			[1] Bennoui 2022 cites Kirklin 2015 doi	Table 2, p. 5, row 43 report
ErTe2		-105.846 kJ/mol-atom	0	DFT			[1] Bennoui 2022	Table 2, p. 5, row 42 report
ErTe3		-116.258 kJ/mol-atom	0	DFT			[1] Bennoui 2022 cites Jain 2013 doi	Table 2, p. 5, row 27 report
ErTe3	ErTe3	-102.85 kJ/mol-atom ± 1.3	298.15	experimental	-116.416 (mp-aaacjkdr)	-85.055 (oqmd-665801)	[1] Bennoui 2022 cites Imamaliyeva 2020 doi	Table 2, p. 5, row 28 report
ErTe3	ErTe3	-86.964 kJ/mol-atom		model	-116.416 (mp-aaacjkdr)	-85.055 (oqmd-665801)	[1] Bennoui 2022	Table 2, p. 5, row 25 report
ErTe3		-84.996 kJ/mol-atom	0	DFT			[1] Bennoui 2022 cites Kirklin 2015 doi	Table 2, p. 5, row 26 report
ErTe3		-84.589 kJ/mol-atom	0	DFT			[1] Bennoui 2022	Table 2, p. 5, row 24 report

Other properties

Phase transition (9)

Phase transition, Er–Te system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1463 K	1463	congruent melting: L -> Er2Te3 L: Te 0.6; Er2Te3: Te 0.6	experimental	[1] Bennoui 2022 cites Abrikosov 1973	Table 7, p. 10, row 8 report
Phase transition	1465 K	1465	congruent melting: L -> Er2Te3 L: Te 0.6; Er2Te3: Te 0.6	experimental	[1] Bennoui 2022	Table 7, p. 10, row 7 report
Phase transition	1486 K	1486	congruent melting	experimental	[1] Bennoui 2022	p. 2 report	The ErTe and Er2Te3 compounds had congruently melting temperatures at 1773 and 1486 K, respectively.
Phase transition	1486 K	1486	congruent melting: L -> Er2Te3 L: Te 0.6; Er2Te3: Te 0.6	experimental	[1] Bennoui 2022 cites Massalski 1990	Table 7, p. 10, row 9 report
Phase transition	1763 K	1763	congruent melting: L -> ErTe L: Te 0.5; ErTe: Te 0.5	experimental	[1] Bennoui 2022 cites Abrikosov 1973	Table 7, p. 10, row 14 report
Phase transition	1773 K	1773	congruent melting	experimental	[1] Bennoui 2022	p. 2 report	The ErTe and Er2Te3 compounds had congruently melting temperatures at 1773 and 1486 K, respectively.
Phase transition	1773 K	1773	congruent melting: L -> ErTe L: Te 0.5; ErTe: Te 0.5	experimental	[1] Bennoui 2022 cites Haase 1965 doi	Table 7, p. 10, row 15 report
Phase transition	1773 K	1773	congruent melting: L -> ErTe L: Te 0.5; ErTe: Te 0.5	experimental	[1] Bennoui 2022 cites Massalski 1990	Table 7, p. 10, row 16 report
Phase transition	1779 K	1779	congruent melting: L -> ErTe L: Te 0.5; ErTe: Te 0.5	experimental	[1] Bennoui 2022	Table 7, p. 10, row 13 report

Crystal structure (24)

Crystal structure, Er–Te system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	12.031 Å	0	Er2Te3 alloy: Er 0.4, Te 0.6	DFT	[1] Bennoui 2022	Table 1, p. 3, row 17 report
Lattice a	6.109 Å	0	ErTe alloy: Er 0.5, Te 0.5	DFT	[1] Bennoui 2022	Table 1, p. 3, row 19 report
Lattice a	4.448 Å	0	ErTe2 alloy: Er 0.333333, Te 0.666667	DFT	[1] Bennoui 2022	Table 1, p. 3, row 21 report
Lattice a	4.325 Å	0	ErTe3 alloy: Er 0.25, Te 0.75	DFT	[1] Bennoui 2022	Table 1, p. 3, row 15 report
Lattice a	12.127 Å	298.15	Er2Te3 alloy: Er 0.4, Te 0.6	experimental	[1] Bennoui 2022 cites Stoewe 1998	Table 1, p. 3, row 16 report
Lattice a	6.063 Å	298.15	ErTe alloy: Er 0.5, Te 0.5	experimental	[1] Bennoui 2022 cites Khan 1976	Table 1, p. 3, row 18 report
Lattice a	4.248 Å	298.15	ErTe2 alloy: Er 0.333333, Te 0.666667	experimental	[1] Bennoui 2022 cites Cannon 1970 doi	Table 1, p. 3, row 20 report
Lattice a	4.285 Å	298.15	ErTe3 alloy: Er 0.25, Te 0.75	experimental	[1] Bennoui 2022 cites Vassiliev 1980	Table 1, p. 3, row 14 report
Lattice b	8.565 Å	0	Er2Te3 alloy: Er 0.4, Te 0.6	DFT	[1] Bennoui 2022	Table 1, p. 3, row 17 report
Lattice b	6.109 Å	0	ErTe alloy: Er 0.5, Te 0.5	DFT	[1] Bennoui 2022	Table 1, p. 3, row 19 report
Lattice b	4.448 Å	0	ErTe2 alloy: Er 0.333333, Te 0.666667	DFT	[1] Bennoui 2022	Table 1, p. 3, row 21 report
Lattice b	4.325 Å	0	ErTe3 alloy: Er 0.25, Te 0.75	DFT	[1] Bennoui 2022	Table 1, p. 3, row 15 report
Lattice b	8.581 Å	298.15	Er2Te3 alloy: Er 0.4, Te 0.6	experimental	[1] Bennoui 2022 cites Stoewe 1998	Table 1, p. 3, row 16 report
Lattice b	6.063 Å	298.15	ErTe alloy: Er 0.5, Te 0.5	experimental	[1] Bennoui 2022 cites Khan 1976	Table 1, p. 3, row 18 report
Lattice b	4.248 Å	298.15	ErTe2 alloy: Er 0.333333, Te 0.666667	experimental	[1] Bennoui 2022 cites Cannon 1970 doi	Table 1, p. 3, row 20 report
Lattice b	4.285 Å	298.15	ErTe3 alloy: Er 0.25, Te 0.75	experimental	[1] Bennoui 2022 cites Vassiliev 1980	Table 1, p. 3, row 14 report
Lattice c	24.908 Å	0	Er2Te3 alloy: Er 0.4, Te 0.6	DFT	[1] Bennoui 2022	Table 1, p. 3, row 17 report
Lattice c	6.109 Å	0	ErTe alloy: Er 0.5, Te 0.5	DFT	[1] Bennoui 2022	Table 1, p. 3, row 19 report
Lattice c	8.691 Å	0	ErTe2 alloy: Er 0.333333, Te 0.666667	DFT	[1] Bennoui 2022	Table 1, p. 3, row 21 report
Lattice c	25.384 Å	0	ErTe3 alloy: Er 0.25, Te 0.75	DFT	[1] Bennoui 2022	Table 1, p. 3, row 15 report
Lattice c	25.728 Å	298.15	Er2Te3 alloy: Er 0.4, Te 0.6	experimental	[1] Bennoui 2022 cites Stoewe 1998	Table 1, p. 3, row 16 report
Lattice c	6.063 Å	298.15	ErTe alloy: Er 0.5, Te 0.5	experimental	[1] Bennoui 2022 cites Khan 1976	Table 1, p. 3, row 18 report
Lattice c	8.865 Å	298.15	ErTe2 alloy: Er 0.333333, Te 0.666667	experimental	[1] Bennoui 2022 cites Cannon 1970 doi	Table 1, p. 3, row 20 report
Lattice c	25.278 Å	298.15	ErTe3 alloy: Er 0.25, Te 0.75	experimental	[1] Bennoui 2022 cites Vassiliev 1980	Table 1, p. 3, row 14 report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

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-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi: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). doi: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). 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); 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.

@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}
}