Ga–Ho system

68 accepted literature values from 1 paper(s) (experimental 14, model 54); 1 calculated phase diagram(s). 3 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 (10) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	14
model	54

Accepted values by property group
Property group	Values
invariant reaction	30
formation	38

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
GaHo-20Ait.tdb	M. Ait Boukideur, N. Selhaoui, F.Z. Chrifi Alaoui, A. Iddaoudi, K. Achgar, S. Kardellass, J. Therm. Anal. Calorim., 139, 3623-33(2020). doi:10.1007/s10973-019-08689-5	`97e610d6cbfd4c808bdb0f02491ee357f8c16a9ca0ce2eeb65a702f2af234d9d`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GaHo-20Ait.tdb	1507.37	GAHO_B33 (x(Ho) 0.5) + LIQUID (x(Ho) 0.5685) + GA3HO5_D88 (x(Ho) 0.625)
GaHo-20Ait.tdb	1507.37	GAHO_B33 (x(Ho) 0.5) + LIQUID (x(Ho) 0.56848) + GA3HO5_D88 (x(Ho) 0.625)
GaHo-20Ait.tdb	1507.37	GAHO_B33 (x(Ho) 0.5) + LIQUID (x(Ho) 0.56851) + GA3HO5_D88 (x(Ho) 0.625)
GaHo-20Ait.tdb	1485.63	GA2HO_C32 (x(Ho) 0.33333) + LIQUID (x(Ho) 0.42307) + GAHO_B33 (x(Ho) 0.5)
GaHo-20Ait.tdb	1485.63	GA2HO_C32 (x(Ho) 0.33333) + LIQUID (x(Ho) 0.42309) + GAHO_B33 (x(Ho) 0.5)
GaHo-20Ait.tdb	1231.95	GA3HO5_D88 (x(Ho) 0.625) + LIQUID (x(Ho) 0.79508) + HCP_A3 (x(Ho) 1)
GaHo-20Ait.tdb	1231.95	GA3HO5_D88 (x(Ho) 0.625) + LIQUID (x(Ho) 0.79512) + HCP_A3 (x(Ho) 1)
GaHo-20Ait.tdb	1166.09	LIQUID (x(Ho) 0.15086) + GA3HO (x(Ho) 0.25) + GA2HO_C32 (x(Ho) 0.33333)
GaHo-20Ait.tdb	1166.09	LIQUID (x(Ho) 0.15091) + GA3HO (x(Ho) 0.25) + GA2HO_C32 (x(Ho) 0.33333)
GaHo-20Ait.tdb	564.91	LIQUID (x(Ho) 0.00579) + GA6HO (x(Ho) 0.14286) + GA3HO (x(Ho) 0.25)
GaHo-20Ait.tdb	564.91	LIQUID (x(Ho) 0.00578) + GA6HO (x(Ho) 0.14286) + GA3HO (x(Ho) 0.25)
GaHo-20Ait.tdb	564.91	LIQUID (x(Ho) 0.00577) + GA6HO (x(Ho) 0.14286) + GA3HO (x(Ho) 0.25)
GaHo-20Ait.tdb	302.91	ORTHORHOMBIC_A11 (x(Ho) 0) + LIQUID (x(Ho) 0) + GA6HO (x(Ho) 0.14286)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ga–Ho system (30)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1573.15	congruent melting: Liq <=> HoGa2	Liq: Ga 0.667; HoGa2: Ga 0.666667, Ho 0.333333	model	[1] Boukideur 2020	Table 3, p. 6, row 18 report
1573.15	congruent melting: Liq <=> HoGa2	Liq: Ga 0.667; HoGa2: Ga 0.666667, Ho 0.333333	experimental	[1] Boukideur 2020 cites Pelleg 1982 doi	Table 3, p. 6, row 20 report
1553.15	congruent melting: Liq <=> HoGa	Liq: Ga 0.5; HoGa: Ga 0.5, Ho 0.5	model	[1] Boukideur 2020	Table 3, p. 6, row 10 report
1553.15	congruent melting: Liq <=> HoGa	Liq: Ga 0.5; HoGa: Ga 0.5, Ho 0.5	experimental	[1] Boukideur 2020 cites Yatsenko 1979 doi	Table 3, p. 6, row 12 report
1543.15	congruent melting: Liq <=> HoGa2	Liq: Ga 0.667; HoGa2: Ga 0.666667, Ho 0.333333	experimental	[1] Boukideur 2020 cites Yatsenko 1979 doi	Table 3, p. 6, row 21 report
1503.15	Liq <=> Ho5Ga3 + HoGa	Liq: Ga 0.375; Ho5Ga3: Ga 0.375, Ho 0.625; HoGa: Ga 0.5, Ho 0.5	model	[1] Boukideur 2020	Table 3, p. 6, row 7 report
1503.15	Liq <=> Ho5Ga3 + HoGa	Liq: Ga 0.433; Ho5Ga3: Ga 0.375, Ho 0.625; HoGa: Ga 0.5, Ho 0.5	model	[1] Boukideur 2020	Table 3, p. 6, row 6 report
1503.15	Liq <=> Ho5Ga3 + HoGa	Liq: Ga 0.43; Ho5Ga3: Ga 0.375, Ho 0.625; HoGa: Ga 0.5, Ho 0.5	model	[1] Boukideur 2020	Table 3, p. 6, row 5 report
1503.15	Liq <=> Ho5Ga3 + HoGa	Liq: Ga 0.375; Ho5Ga3: Ga 0.375, Ho 0.625; HoGa: Ga 0.5, Ho 0.5	experimental	[1] Boukideur 2020 cites Yatsenko 1979 doi	Table 3, p. 6, row 8 report
1483.15	Liq <=> HoGa2 + HoGa	Liq: Ga 0.586; HoGa2: Ga 0.666667, Ho 0.333333; HoGa: Ga 0.5, Ho 0.5	model	[1] Boukideur 2020	Table 3, p. 6, row 15 report
1483.15	Liq <=> HoGa2 + HoGa	Liq: Ga 0.576; HoGa2: Ga 0.666667, Ho 0.333333; HoGa: Ga 0.5, Ho 0.5	model	[1] Boukideur 2020	Table 3, p. 6, row 13 report
1483.15	Liq <=> HoGa2 + HoGa	Liq: Ga 0.575; HoGa2: Ga 0.666667, Ho 0.333333; HoGa: Ga 0.5, Ho 0.5	experimental	[1] Boukideur 2020 cites Yatsenko 1979 doi	Table 3, p. 6, row 16 report
1223.15	Liq <=> Ho5Ga3 + (Ho)	Liq: Ga 0.183; Ho5Ga3: Ga 0.375, Ho 0.625	model	[1] Boukideur 2020	Table 3, p. 6, row 2 report
1223.15	Liq <=> Ho5Ga3 + (Ho)	Liq: Ga 0.204; Ho5Ga3: Ga 0.375, Ho 0.625	model	[1] Boukideur 2020	Table 3, p. 6, row 1 report
1223.15	Liq <=> Ho5Ga3 + (Ho)	Liq: Ga 0.202; Ho5Ga3: Ga 0.375, Ho 0.625	experimental	[1] Boukideur 2020 cites Yatsenko 1979 doi	Table 3, p. 6, row 4 report
1223.15	Liq <=> Ho5Ga3 + (Ho)	Liq: Ga 0.19; Ho5Ga3: Ga 0.375, Ho 0.625	model	[1] Boukideur 2020	Table 3, p. 6, row 3 report
1158.15	HoGa3 <=> Liq + HoGa2	HoGa3: Ga 0.75, Ho 0.25; Liq: Ga 0.86; HoGa2: Ga 0.666667, Ho 0.333333	model	[1] Boukideur 2020	Table 3, p. 6, row 23 report
1158.15	HoGa3 <=> Liq + HoGa2	HoGa3: Ga 0.75, Ho 0.25; Liq: Ga 0.85; HoGa2: Ga 0.666667, Ho 0.333333	model	[1] Boukideur 2020	Table 3, p. 6, row 22 report
1158.15	HoGa3 <=> Liq + HoGa2	HoGa3: Ga 0.75, Ho 0.25; Liq: Ga 0.87; HoGa2: Ga 0.666667, Ho 0.333333	model	[1] Boukideur 2020	Table 3, p. 6, row 24 report
1158.15	HoGa3 <=> Liq + HoGa2	HoGa3: Ga 0.75, Ho 0.25; Liq: Ga 0.857; HoGa2: Ga 0.666667, Ho 0.333333	experimental	[1] Boukideur 2020 cites Pelleg 1982 doi	Table 3, p. 6, row 25 report
1143.15	HoGa3 <=> Liq + HoGa2	HoGa3: Ga 0.75, Ho 0.25; Liq: Ga 0.866; HoGa2: Ga 0.666667, Ho 0.333333	experimental	[1] Boukideur 2020 cites Yatsenko 1979 doi	Table 3, p. 6, row 26 report
585.15	HoGa6 <=> Liq + HoGa3	HoGa6: Ga 0.857143, Ho 0.142857; Liq: Ga 0.996; HoGa3: Ga 0.75, Ho 0.25	model	[1] Boukideur 2020	Table 3, p. 6, row 28 report
585.15	HoGa6 <=> Liq + HoGa3	HoGa6: Ga 0.857143, Ho 0.142857; Liq: Ga 0.991; HoGa3: Ga 0.75, Ho 0.25	model	[1] Boukideur 2020	Table 3, p. 6, row 27 report
585.15	HoGa6 <=> Liq + HoGa3	HoGa6: Ga 0.857143, Ho 0.142857; Liq: Ga 1; HoGa3: Ga 0.75, Ho 0.25	experimental	[1] Boukideur 2020 cites Pelleg 1982 doi	Table 3, p. 6, row 30 report
585.15	HoGa6 <=> Liq + HoGa3	HoGa6: Ga 0.857143, Ho 0.142857; Liq: Ga 1; HoGa3: Ga 0.75, Ho 0.25	model	[1] Boukideur 2020	Table 3, p. 6, row 29 report
303.15	(Ga) <=> Liq + HoGa6	HoGa6: Ga 0.857143, Ho 0.142857	experimental	[1] Boukideur 2020 cites Yatsenko 1979 doi	Table 3, p. 6, row 35 report
301.15	(Ga) <=> Liq + HoGa6	Liq: Ga 0.999; HoGa6: Ga 0.857143, Ho 0.142857	model	[1] Boukideur 2020	Table 3, p. 6, row 31 report
301.15	(Ga) <=> Liq + HoGa6	Liq: Ga 1; HoGa6: Ga 0.857143, Ho 0.142857	model	[1] Boukideur 2020	Table 3, p. 6, row 33 report
301.15	(Ga) <=> Liq + HoGa6	Liq: Ga 1; HoGa6: Ga 0.857143, Ho 0.142857	experimental	[1] Boukideur 2020 cites Pelleg 1982 doi	Table 3, p. 6, row 34 report
299.15	(Ga) <=> Liq + HoGa6	Liq: Ga 0.999; HoGa6: Ga 0.857143, Ho 0.142857	model	[1] Boukideur 2020	Table 3, p. 6, row 32 report

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, Ga–Ho system (23)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Ho5Ga3	Ga3Ho5	-62.21 kJ/mol-atom	298.15	model	-47.396 (mp-aaacqcoc)	-47.889 (oqmd-2053345)	[1] Boukideur 2020	Table 1, p. 3, row 3 report
Ho5Ga3	Ga3Ho5	-61.2 kJ/mol-atom	298.15	model	-47.396 (mp-aaacqcoc)	-47.889 (oqmd-2053345)	[1] Boukideur 2020	Table 1, p. 3, row 4 report
Ho5Ga3	Ga3Ho5	-61.02 kJ/mol-atom	298.15	model	-47.396 (mp-aaacqcoc)	-47.889 (oqmd-2053345)	[1] Boukideur 2020 cites De 2014	Table 1, p. 3, row 1 report
Ho5Ga3	Ga3Ho5	-56.45 kJ/mol-atom	298.15	model	-47.396 (mp-aaacqcoc)	-47.889 (oqmd-2053345)	[1] Boukideur 2020	Table 1, p. 3, row 2 report
HoGa	GaHo	-71.34 kJ/mol-atom	298.15	model	-60.627 (mp-aaacfyar)	-60.703 (oqmd-30286)	[1] Boukideur 2020 cites De 2014	Table 1, p. 3, row 5 report
HoGa	GaHo	-71 kJ/mol-atom	298.15	model	-60.627 (mp-aaacfyar)	-60.703 (oqmd-30286)	[1] Boukideur 2020	Table 1, p. 3, row 6 report
HoGa	GaHo	-70 kJ/mol-atom	298.15	model	-60.627 (mp-aaacfyar)	-60.703 (oqmd-30286)	[1] Boukideur 2020	Table 1, p. 3, row 7 report
HoGa	GaHo	-67.6 kJ/mol-atom	298.15	model	-60.627 (mp-aaacfyar)	-60.703 (oqmd-30286)	[1] Boukideur 2020	Table 1, p. 3, row 8 report
HoGa2	Ga2Ho	-72 kJ/mol-atom	298.15	model	-60.477 (mp-aaaaabwi)	-60.418 (oqmd-19196)	[1] Boukideur 2020	Table 1, p. 3, row 10 report
HoGa2	Ga2Ho	-71 kJ/mol-atom	298.15	model	-60.477 (mp-aaaaabwi)	-60.418 (oqmd-19196)	[1] Boukideur 2020	Table 1, p. 3, row 11 report
HoGa2	Ga2Ho	-69.04 kJ/mol-atom	298.15	model	-60.477 (mp-aaaaabwi)	-60.418 (oqmd-19196)	[1] Boukideur 2020	Table 1, p. 3, row 12 report
HoGa2	Ga2Ho	-62.92 kJ/mol-atom	298.15	model	-60.477 (mp-aaaaabwi)	-60.418 (oqmd-19196)	[1] Boukideur 2020 cites De 2014	Table 1, p. 3, row 9 report
HoGa3	Ga3Ho	-57.8 kJ/mol-atom	681.575	experimental	-51.381 (mp-aaaaadzk)	-50.392 (oqmd-27370)	[1] Boukideur 2020 cites Colinet 1994 doi	Table 1, p. 3, row 14 report
HoGa3	Ga3Ho	-56.8 kJ/mol-atom	298.15	model	-51.381 (mp-aaaaadzk)	-50.392 (oqmd-27370)	[1] Boukideur 2020	Table 1, p. 3, row 16 report
HoGa3	Ga3Ho	-56.8 kJ/mol-atom	298.15	experimental	-51.381 (mp-aaaaadzk)	-50.392 (oqmd-27370)	[1] Boukideur 2020 cites Meschel 2001 doi	Table 1, p. 3, row 15 report
HoGa3	Ga3Ho	-56.8 kJ/mol-atom	298.15	model	-51.381 (mp-aaaaadzk)	-50.392 (oqmd-27370)	[1] Boukideur 2020	Table 1, p. 3, row 18 report
HoGa3	Ga3Ho	-56.8 kJ/mol-atom	298.15	model	-51.381 (mp-aaaaadzk)	-50.392 (oqmd-27370)	[1] Boukideur 2020	Table 1, p. 3, row 17 report
HoGa3	Ga3Ho	-50 kJ/mol-atom	298.15	model	-51.381 (mp-aaaaadzk)	-50.392 (oqmd-27370)	[1] Boukideur 2020 cites De 2014	Table 1, p. 3, row 13 report
HoGa6	Ga6Ho	-35 kJ/mol-atom	298.15	model	-28.329 (mp-aaackuyq)	-29.467 (oqmd-1484087)	[1] Boukideur 2020	Table 1, p. 3, row 21 report
HoGa6	Ga6Ho	-33.1 kJ/mol-atom	681.575	experimental	-28.329 (mp-aaackuyq)	-29.467 (oqmd-1484087)	[1] Boukideur 2020 cites Colinet 1994 doi	Table 1, p. 3, row 20 report
HoGa6	Ga6Ho	-33.1 kJ/mol-atom	298.15	model	-28.329 (mp-aaackuyq)	-29.467 (oqmd-1484087)	[1] Boukideur 2020	Table 1, p. 3, row 23 report
HoGa6	Ga6Ho	-33 kJ/mol-atom	298.15	model	-28.329 (mp-aaackuyq)	-29.467 (oqmd-1484087)	[1] Boukideur 2020	Table 1, p. 3, row 22 report
HoGa6	Ga6Ho	-28.95 kJ/mol-atom	298.15	model	-28.329 (mp-aaackuyq)	-29.467 (oqmd-1484087)	[1] Boukideur 2020 cites De 2014	Table 1, p. 3, row 19 report

Other properties

Formation (15)

Formation, Ga–Ho system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy of formation	9 J/mol-atom/K	298.15	Ho5Ga3 alloy: Ho 0.625	model	[1] Boukideur 2020	Table 1, p. 3, row 4 report
Entropy of formation	1.3493 J/mol-atom/K	298.15	Ho5Ga3 alloy: Ho 0.625	model	[1] Boukideur 2020	Table 1, p. 3, row 2 report
Entropy of formation	1.3238 J/mol-atom/K	298.15	Ho5Ga3 alloy: Ho 0.625	model	[1] Boukideur 2020	Table 1, p. 3, row 3 report
Entropy of formation	4.7116 J/mol-atom/K	298.15	HoGa alloy: Ho 0.5	model	[1] Boukideur 2020	Table 1, p. 3, row 6 report
Entropy of formation	7.33 J/mol-atom/K	298.15	HoGa alloy: Ho 0.5	model	[1] Boukideur 2020	Table 1, p. 3, row 8 report
Entropy of formation	0.8896 J/mol-atom/K	298.15	HoGa alloy: Ho 0.5	model	[1] Boukideur 2020	Table 1, p. 3, row 7 report
Entropy of formation	1.8299 J/mol-atom/K	298.15	HoGa2 alloy: Ho 0.333333	model	[1] Boukideur 2020	Table 1, p. 3, row 11 report
Entropy of formation	3.5907 J/mol-atom/K	298.15	HoGa2 alloy: Ho 0.333333	model	[1] Boukideur 2020	Table 1, p. 3, row 10 report
Entropy of formation	3.801 J/mol-atom/K	298.15	HoGa2 alloy: Ho 0.333333	model	[1] Boukideur 2020	Table 1, p. 3, row 12 report
Entropy of formation	0.1403 J/mol-atom/K	298.15	HoGa3 alloy: Ho 0.25	model	[1] Boukideur 2020	Table 1, p. 3, row 16 report
Entropy of formation	2.6898 J/mol-atom/K	298.15	HoGa3 alloy: Ho 0.25	model	[1] Boukideur 2020	Table 1, p. 3, row 18 report
Entropy of formation	-0.0523 J/mol-atom/K	298.15	HoGa3 alloy: Ho 0.25	model	[1] Boukideur 2020	Table 1, p. 3, row 17 report
Entropy of formation	-2.6685 J/mol-atom/K	298.15	HoGa6 alloy: Ho 0.142857	model	[1] Boukideur 2020	Table 1, p. 3, row 22 report
Entropy of formation	-1.2683 J/mol-atom/K	298.15	HoGa6 alloy: Ho 0.142857	model	[1] Boukideur 2020	Table 1, p. 3, row 23 report
Entropy of formation	0.8342 J/mol-atom/K	298.15	HoGa6 alloy: Ho 0.142857	model	[1] Boukideur 2020	Table 1, p. 3, row 21 report

Sources

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

M. Ait Boukideur, N. Selhaoui, F. Z. Chrifi Alaoui, A. Iddaoudi, K. Achgar, S. Kardellass, Thermodynamic assessment of the Ho–Ga system, J Therm Anal Calorim 139, 3623-3633 (2020). doi:10.1007/s10973-019-08689-5

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}
}