Ga–Gd system

90 accepted literature values from 3 paper(s) (experimental 47, model 43); 3 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	47
model	43

Accepted values by property group
Property group	Values
invariant reaction	51
phase transition	10
formation	29

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
GaGd-19Liu.tdb	J. Liu, F. Li, J. Liu, X. Zhang, T. Ahmad, T. Liang, Monatsh. Chem., 150, 1225-33(2019). doi:10.1007/s00706-019-02420-8	`c20783412d926e192b4e08c63e9ec61116107de671abb7d20b514c99b4f67534`	viewer · TDB · JSON
GaGd-20Ait.tdb	M. Ait Boukideur, N. Selhaoui, F.Z. Chrifi Alaoui, A. Iddaoudi, K. Achgar, Mater. Today Proc., 24, 71-75(2020). doi:10.1016/j.matpr.2019.07.598	`c6bc03bf1e76ae90e0567ecfdf829a56f82c793fcd84a011349dae5f6be78b10`	viewer · TDB · JSON
GaGd-23Tam.tdb	R. Tamim, O. Rapaud, R. Boulesteix, A. Maitre, Calphad, 82, 102596(2023). doi:10.1016/j.calphad.2023.102596	`87a4fc5f0d2a5c215b6554a03990e836a72175e0a35ab0b9283660bd85d05b65`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GaGd-19Liu.tdb	1508.06	LIQUID (x(Gd) 0.97114) + BCC_A2 (x(Gd) 1) + HCP_A3 (x(Gd) 1)
GaGd-19Liu.tdb	1508.06	LIQUID (x(Gd) 0.97126) + HCP_A3 (x(Gd) 1) + BCC_A2 (x(Gd) 1)
GaGd-19Liu.tdb	1466.07	GA2GD_C32 (x(Gd) 0.33346) + GAGD_B33 (x(Gd) 0.5) + LIQUID (x(Gd) 0.52262)
GaGd-19Liu.tdb	1380.29	GAGD_B33 (x(Gd) 0.5) + GA2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.63414)
GaGd-19Liu.tdb	1380.28	GAGD_B33 (x(Gd) 0.5) + GA2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.63444)
GaGd-19Liu.tdb	1283	GA2GD3 (x(Gd) 0.6) + GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.74446)
GaGd-19Liu.tdb	1283	GA2GD3 (x(Gd) 0.6) + GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.74423)
GaGd-19Liu.tdb	1283	GA2GD3 (x(Gd) 0.6) + GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.74463)
GaGd-19Liu.tdb	1106.37	GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.85006) + HCP_A3 (x(Gd) 0.99999)
GaGd-19Liu.tdb	1106.37	GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.85003) + HCP_A3 (x(Gd) 0.99999)
GaGd-19Liu.tdb	1106.37	GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.85006) + HCP_A3 (x(Gd) 0.99999)
GaGd-19Liu.tdb	678.55	LIQUID (x(Gd) 6.600e-4) + GA6GD (x(Gd) 0.14286) + GA2GD_C32 (x(Gd) 0.19636)
GaGd-19Liu.tdb	302.91	ORTHORHOMBIC_A11 (x(Gd) 0) + LIQUID (x(Gd) 0) + GA6GD (x(Gd) 0.14286)
GaGd-20Ait.tdb	1508.06	LIQUID (x(Gd) 0.97106) + HCP_A3 (x(Gd) 1) + BCC_A2 (x(Gd) 1)
GaGd-20Ait.tdb	1462.89	GA2GD_C32 (x(Gd) 0.33333) + GAGD_B33 (x(Gd) 0.5) + LIQUID (x(Gd) 0.54314)
GaGd-20Ait.tdb	1372.54	GAGD_B33 (x(Gd) 0.5) + GA2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.66223)
GaGd-20Ait.tdb	1353.37	GA2GD3 (x(Gd) 0.6) + GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.69548)
GaGd-20Ait.tdb	1118.12	GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.83533) + HCP_A3 (x(Gd) 1)
GaGd-20Ait.tdb	673.22	LIQUID (x(Gd) 0.01018) + GA6GD (x(Gd) 0.14286) + GA2GD_C32 (x(Gd) 0.21141)
GaGd-20Ait.tdb	302.91	LIQUID (x(Gd) 0) + ORTHORHOMBIC_A11 (x(Gd) 0) + GA6GD (x(Gd) 0.14286)
GaGd-23Tam.tdb	1508.05	LIQUID (x(Gd) 0.96945) + BCC_A2 (x(Gd) 0.99999) + HCP_A3 (x(Gd) 0.99999)
GaGd-23Tam.tdb	1508.05	LIQUID (x(Gd) 0.96947) + HCP_A3 (x(Gd) 0.99999) + BCC_A2 (x(Gd) 0.99999)
GaGd-23Tam.tdb	1458.13	GA2GD_C32 (x(Gd) 0.33333) + GAGD_B33 (x(Gd) 0.5) + LIQUID (x(Gd) 0.53586)
GaGd-23Tam.tdb	1375.4	GAGD_B33 (x(Gd) 0.5) + GA2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.62812)
GaGd-23Tam.tdb	1375.4	GAGD_B33 (x(Gd) 0.5) + GA2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.62805)
GaGd-23Tam.tdb	1363.62	GA2GD3 (x(Gd) 0.6) + GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.65628)
GaGd-23Tam.tdb	1363.62	GA2GD3 (x(Gd) 0.6) + GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.65581)
GaGd-23Tam.tdb	1363.62	GA2GD3 (x(Gd) 0.6) + GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.65634)
GaGd-23Tam.tdb	1096.77	GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.85088) + HCP_A3 (x(Gd) 0.99999)
GaGd-23Tam.tdb	1096.77	GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.85085) + HCP_A3 (x(Gd) 0.99999)
GaGd-23Tam.tdb	1096.77	GA3GD5 (x(Gd) 0.625) + LIQUID (x(Gd) 0.85088) + HCP_A3 (x(Gd) 0.99999)
GaGd-23Tam.tdb	670.63	LIQUID (x(Gd) 4.500e-4) + GA6GD (x(Gd) 0.14286) + GA2GD_C32 (x(Gd) 0.22729)
GaGd-23Tam.tdb	302.91	ORTHORHOMBIC_A11 (x(Gd) 0) + LIQUID (x(Gd) 0) + GA6GD (x(Gd) 0.14286)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull GaGd-19Liu · CALPHAD hull GaGd-20Ait

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ga–Gd system (51)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1673	congruent melting: liq. → Ga2Gd	liq.: Gd 0.3333; Ga2Gd: Ga 0.666667, Gd 0.333333	experimental	[1] Liu 2019 cites Buschow 1976 doi	Table 3, p. 7, row 11 report
1673	congruent melting: liq. → Ga2Gd	liq.: Gd 0.3333; Ga2Gd: Ga 0.666667, Gd 0.333333	model	[1] Liu 2019	Table 3, p. 7, row 8 report
1673	congruent melting: liq. → Ga2Gd	liq.: Gd 0.3333; Ga2Gd: Ga 0.666667, Gd 0.333333	experimental	[1] Liu 2019 cites Pelleg 1981 doi	Table 3, p. 7, row 10 report
1673	congruent melting: liq. → Ga2Gd	liq.: Gd 0.3333; Ga2Gd: Ga 0.666667, Gd 0.333333	experimental	[1] Liu 2019 cites Yatsenko 1972	Table 3, p. 7, row 9 report
1535	liq. + bcc → hcp(Gd)	liq.: Gd 0.9795; bcc: Gd 1; hcp(Gd): Gd 1	model	[1] Liu 2019	Table 3, p. 7, row 1 report
1508.15	metatectic/catatectic: Liq + (αGd) <=> (βGd)	Liq: Gd 0.95	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 27 report
1508.15	metatectic/catatectic: Liq + (αGd) <=> (βGd)	Liq: Gd 0.97	model	[2] Boukideur 2020	Table 3, p. 4, row 26 report
1508	liq. + bcc → hcp(Gd)	bcc: Gd 1; hcp(Gd): Gd 1	experimental	[1] Liu 2019 cites Palenzona 1990 doi	Table 3, p. 7, row 2 report
1473	liq. + Ga2Gd → GaGd	Ga2Gd: Ga 0.666667, Gd 0.333333; GaGd: Ga 0.5, Gd 0.5	experimental	[1] Liu 2019 cites Yatsenko 1972	Table 3, p. 7, row 5 report
1468.15	peritectic: Liq + Ga2Gd <=> GaGd	Liq: Gd 0.55; Ga2Gd: Gd 0.333333; GaGd: Gd 0.5	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 16 report
1468	liq. + Ga2Gd → GaGd	liq.: Gd 0.5225; Ga2Gd: Gd 0.3333; GaGd: Gd 0.5	model	[1] Liu 2019	Table 3, p. 7, row 3 report
1468	liq. + Ga2Gd → GaGd	liq.: Gd 0.55; Ga2Gd: Gd 0.3333; GaGd: Gd 0.5	experimental	[1] Liu 2019 cites Palenzona 1990 doi	Table 3, p. 7, row 4 report
1463.15	peritectic: Liq + Ga2Gd <=> GaGd	Liq: Gd 0.54; Ga2Gd: Gd 0.333333; GaGd: Gd 0.5	model	[2] Boukideur 2020	Table 3, p. 4, row 14 report
1463.15	peritectic: Liq + Ga2Gd <=> GaGd	Liq: Gd 0.56; Ga2Gd: Gd 0.333333; GaGd: Gd 0.5	experimental	[2] Boukideur 2020 cites Buschow 1976 doi	Table 3, p. 4, row 15 report
1463	liq. + Ga2Gd → GaGd	Ga2Gd: Ga 0.666667, Gd 0.333333; GaGd: Ga 0.5, Gd 0.5	experimental	[1] Liu 2019 cites Pelleg 1981 doi	Table 3, p. 7, row 6 report
1463	liq. + Ga2Gd → GaGd	Ga2Gd: Ga 0.666667, Gd 0.333333; GaGd: Ga 0.5, Gd 0.5	experimental	[1] Liu 2019 cites Buschow 1976 doi	Table 3, p. 7, row 7 report
1393	liq. + GaGd → Ga2Gd3	GaGd: Ga 0.5, Gd 0.5; Ga2Gd3: Ga 0.4, Gd 0.6	experimental	[1] Liu 2019 cites Yatsenko 1972	Table 3, p. 7, row 14 report
1383.15	peritectic: Liq + GaGd <=> Ga2Gd3	Liq: Gd 0.615; GaGd: Gd 0.5; Ga2Gd3: Gd 0.6	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 19 report
1383	liq. + GaGd → Ga2Gd3	liq.: Gd 0.634; GaGd: Gd 0.5; Ga2Gd3: Gd 0.6	model	[1] Liu 2019	Table 3, p. 7, row 12 report
1383	liq. + GaGd → Ga2Gd3	liq.: Gd 0.615; GaGd: Gd 0.5; Ga2Gd3: Gd 0.6	experimental	[1] Liu 2019 cites Palenzona 1990 doi	Table 3, p. 7, row 13 report
1373.15	peritectic: Liq + GaGd <=> Ga2Gd3	Liq: Gd 0.66; GaGd: Gd 0.5; Ga2Gd3: Gd 0.6	model	[2] Boukideur 2020	Table 3, p. 4, row 17 report
1373.15	peritectic: Liq + GaGd <=> Ga2Gd3	Liq: Gd 0.64; GaGd: Gd 0.5; Ga2Gd3: Gd 0.6	experimental	[2] Boukideur 2020 cites Buschow 1976 doi	Table 3, p. 4, row 18 report
1373	liq. + GaGd → Ga2Gd3	GaGd: Ga 0.5, Gd 0.5; Ga2Gd3: Ga 0.4, Gd 0.6	experimental	[1] Liu 2019 cites Buschow 1976 doi	Table 3, p. 7, row 15 report
1373	liq. + Ga2Gd3 → Ga3Gd5	Ga2Gd3: Ga 0.4, Gd 0.6; Ga3Gd5: Ga 0.375, Gd 0.625	experimental	[1] Liu 2019 cites Yatsenko 1972	Table 3, p. 7, row 19 report
1363.15	peritectic: Liq + Ga2Gd3 <=> Ga3Gd5	Liq: Gd 0.64; Ga2Gd3: Gd 0.6; Ga3Gd5: Gd 0.625	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 22 report
1363	liq. + Ga2Gd3 → Ga3Gd5	liq.: Gd 0.64; Ga2Gd3: Gd 0.6; Ga3Gd5: Gd 0.625	experimental	[1] Liu 2019 cites Palenzona 1990 doi	Table 3, p. 7, row 18 report
1353.15	peritectic: Liq + Ga2Gd3 <=> Ga3Gd5	Liq: Gd 0.666; Ga2Gd3: Gd 0.6; Ga3Gd5: Gd 0.625	experimental	[2] Boukideur 2020 cites Buschow 1976 doi	Table 3, p. 4, row 21 report
1353.15	peritectic: Liq + Ga2Gd3 <=> Ga3Gd5	Liq: Gd 0.69; Ga2Gd3: Gd 0.6; Ga3Gd5: Gd 0.625	model	[2] Boukideur 2020	Table 3, p. 4, row 20 report
1352	liq. + Ga2Gd3 → Ga3Gd5	Ga2Gd3: Ga 0.4, Gd 0.6; Ga3Gd5: Ga 0.375, Gd 0.625	experimental	[1] Liu 2019 cites Buschow 1976 doi	Table 3, p. 7, row 20 report
1283	liq. + Ga2Gd3 → Ga3Gd5	Ga2Gd3: Ga 0.4, Gd 0.6; Ga3Gd5: Ga 0.375, Gd 0.625	experimental	[1] Liu 2019 cites Predel 1996	Table 3, p. 7, row 17 report
1283	liq. + Ga2Gd3 → Ga3Gd5	liq.: Gd 0.7465; Ga2Gd3: Gd 0.6; Ga3Gd5: Gd 0.625	model	[1] Liu 2019	Table 3, p. 7, row 16 report
1123.15	eutectic: Liq <=> Ga3Gd5 + (αGd)	Liq: Gd 0.8; Ga3Gd5: Gd 0.625	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 25 report
1123	eutectic: liq. → hcp + Ga3Gd5	liq.: Gd 0.8; hcp: Gd 1; Ga3Gd5: Gd 0.625	experimental	[1] Liu 2019 cites Palenzona 1990 doi	Table 3, p. 7, row 23 report
1123	eutectic: liq. → hcp + Ga3Gd5	Ga3Gd5: Ga 0.375, Gd 0.625	experimental	[1] Liu 2019 cites Yatsenko 1972	Table 3, p. 7, row 22 report
1118.15	eutectic: Liq <=> Ga3Gd5 + (αGd)	Liq: Gd 0.797; Ga3Gd5: Gd 0.625	experimental	[2] Boukideur 2020 cites Buschow 1976 doi	Table 3, p. 4, row 24 report
1118.15	eutectic: Liq <=> Ga3Gd5 + (αGd)	Liq: Gd 0.83; Ga3Gd5: Gd 0.625	model	[2] Boukideur 2020	Table 3, p. 4, row 23 report
1118	eutectic: liq. → hcp + Ga3Gd5	Ga3Gd5: Ga 0.375, Gd 0.625	experimental	[1] Liu 2019 cites Buschow 1976 doi	Table 3, p. 7, row 24 report
1114	eutectic: liq. → hcp + Ga3Gd5	liq.: Gd 0.8479; hcp: Gd 1; Ga3Gd5: Gd 0.625	model	[1] Liu 2019	Table 3, p. 7, row 21 report
679.15	peritectic: Liq + Ga2Gd <=> Ga6Gd	Liq: Gd 0.004; Ga2Gd: Gd 0.333333; Ga6Gd: Gd 0.142857	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 9 report
679	liq. + Ga2Gd → Ga6Gd	liq.: Gd 6.000e-4; Ga2Gd: Gd 0.1964; Ga6Gd: Gd 0.1429	model	[1] Liu 2019	Table 3, p. 7, row 25 report
679	liq. + Ga2Gd → Ga6Gd	liq.: Gd 0.4; Ga2Gd: Gd 0.22; Ga6Gd: Gd 0.143	experimental	[1] Liu 2019 cites Palenzona 1990 doi	Table 3, p. 7, row 27 report
679	liq. + Ga2Gd → Ga6Gd	Ga2Gd: Ga 0.666667, Gd 0.333333; Ga6Gd: Ga 0.857143, Gd 0.142857	experimental	[1] Liu 2019 cites Pelleg 1981 doi	Table 3, p. 7, row 26 report
652.15	peritectic: Liq + Ga2Gd <=> Ga6Gd	Liq: Gd 0.005; Ga2Gd: Gd 0.333333; Ga6Gd: Gd 0.142857	experimental	[2] Boukideur 2020 cites Joshua 1981	Table 3, p. 4, row 8 report
652.15	peritectic: Liq + Ga2Gd <=> Ga6Gd	Liq: Gd 0.007; Ga2Gd: Gd 0.333333; Ga6Gd: Gd 0.142857	model	[2] Boukideur 2020	Table 3, p. 4, row 7 report
573.15	eutectic: Liq + (αGa) <=> Ga6Gd	(αGa): Gd 0.001; Ga6Gd: Gd 0.142857	model	[2] Boukideur 2020	Table 3, p. 4, row 4 report
573.15	eutectic: Liq + (αGa) <=> Ga6Gd	(αGa): Gd 0.001; Ga6Gd: Gd 0.142857	experimental	[2] Boukideur 2020 cites Joshua 1981	Table 3, p. 4, row 5 report
573.15	eutectic: Liq + (αGa) <=> Ga6Gd	(αGa): Gd 0.001; Ga6Gd: Gd 0.142857	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 6 report
303	liq. + Ga6Gd → orth.	liq.: Gd 0; Ga6Gd: Gd 0.1429; orth.: Gd 0	model	[1] Liu 2019	Table 3, p. 7, row 28 report
303	liq. + Ga6Gd → orth.	Ga6Gd: Ga 0.857143, Gd 0.142857	experimental	[1] Liu 2019 cites Yatsenko 1972	Table 3, p. 7, row 29 report
302	liq. + Ga6Gd → orth.	Ga6Gd: Gd 0.143; orth.: Gd 0	experimental	[1] Liu 2019 cites Palenzona 1990 doi	Table 3, p. 7, row 31 report
302	liq. + Ga6Gd → orth.	Ga6Gd: Ga 0.857143, Gd 0.142857	experimental	[1] Liu 2019 cites Pelleg 1981 doi	Table 3, p. 7, row 30 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–Gd system (24)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location	Quote
Ga2Gd		-261.5 unspecified ± 5.9	823.15	model			[1] Liu 2019 cites Kober 1983	p. 4 report	The enthalpy, entropy, and Gibbs energy of formation of Ga2Gd from liquid Ga and solid Gd at 550 °C were as: - 261.5 ± 5.9 kJ/mol, - 88.3 ± 7.1 J/mol, and - 189.0 ± 0.4 kJ/mol [42], respectively, which was cited from Ref. [17].
Ga2Gd	Ga2Gd	-83.5 kJ/mol-atom	298.15	experimental	-63.164 (mp-aaaabdgn)	-64.461 (oqmd-91491)	[2] Boukideur 2020 cites Bayanov 1975	Table 4, p. 4, row 5 report
Ga2Gd	Ga2Gd	-72.8 kJ/mol-atom ± 2.8	1373	experimental	-63.164 (mp-aaaabdgn)	-64.461 (oqmd-91491)	[3] Tamim 2023 cites Meschel 2001 doi	Table 2, p. 8, row 20 report
Ga2Gd	Ga2Gd	-72.8 kJ/mol-atom		model	-63.164 (mp-aaaabdgn)	-64.461 (oqmd-91491)	[2] Boukideur 2020	Table 4, p. 4, row 6 report
Ga2Gd	Ga2Gd	-72.8 kJ/mol-atom	298.15	experimental	-63.164 (mp-aaaabdgn)	-64.461 (oqmd-91491)	[2] Boukideur 2020 cites Meschel 2001 doi	Table 4, p. 4, row 4 report
Ga2Gd	Ga2Gd	-65.03 kJ/mol-atom ± 1	298.15	experimental	-63.164 (mp-aaaabdgn)	-64.461 (oqmd-91491)	[3] Tamim 2023 cites Bayanov 1975	Table 2, p. 8, row 21 report
Ga2Gd	Ga2Gd	-65.03 kJ/mol-atom		model	-63.164 (mp-aaaabdgn)	-64.461 (oqmd-91491)	[2] Boukideur 2020 cites De 2014	Table 4, p. 4, row 3 report
Ga2Gd	Ga2Gd	-63.156 kJ/mol-atom	298.15	model	-63.164 (mp-aaaabdgn)	-64.461 (oqmd-91491)	[3] Tamim 2023	Table 2, p. 8, row 22 report
Ga2Gd3	Ga2Gd3	-64.68 kJ/mol-atom		model	-49.123 (mp-aaaeiziy)	-50.779 (oqmd-89453)	[2] Boukideur 2020 cites De 2014	Table 4, p. 4, row 9 report
Ga2Gd3	Ga2Gd3	-64.68 kJ/mol-atom	298.15	model	-49.123 (mp-aaaeiziy)	-50.779 (oqmd-89453)	[3] Tamim 2023 cites De 1988	Table 2, p. 8, row 25 report
Ga2Gd3	Ga2Gd3	-63.06 kJ/mol-atom		model	-49.123 (mp-aaaeiziy)	-50.779 (oqmd-89453)	[2] Boukideur 2020	Table 4, p. 4, row 10 report
Ga2Gd3	Ga2Gd3	-61.009 kJ/mol-atom	298.15	model	-49.123 (mp-aaaeiziy)	-50.779 (oqmd-89453)	[3] Tamim 2023	Table 2, p. 8, row 26 report
Ga3Gd5	Ga3Gd5	-61.56 kJ/mol-atom		model		-46.682 (oqmd-18351)	[2] Boukideur 2020 cites De 2014	Table 4, p. 4, row 11 report
Ga3Gd5	Ga3Gd5	-61.56 kJ/mol-atom	298.15	model		-46.682 (oqmd-18351)	[3] Tamim 2023 cites De 1988	Table 2, p. 8, row 27 report
Ga3Gd5	Ga3Gd5	-60.698 kJ/mol-atom	298.15	model		-46.682 (oqmd-18351)	[3] Tamim 2023	Table 2, p. 8, row 28 report
Ga3Gd5	Ga3Gd5	-59.78 kJ/mol-atom		model		-46.682 (oqmd-18351)	[2] Boukideur 2020	Table 4, p. 4, row 12 report
Ga6Gd	Ga6Gd	-36 kJ/mol-atom		model	-31.251 (mp-aaackwju)	-31.82 (oqmd-1484077)	[2] Boukideur 2020	Table 4, p. 4, row 2 report
Ga6Gd	Ga6Gd	-31.514 kJ/mol-atom	298.15	model	-31.251 (mp-aaackwju)	-31.82 (oqmd-1484077)	[3] Tamim 2023	Table 2, p. 8, row 19 report
Ga6Gd	Ga6Gd	-30.14 kJ/mol-atom	298.15	model	-31.251 (mp-aaackwju)	-31.82 (oqmd-1484077)	[3] Tamim 2023 cites De 1988	Table 2, p. 8, row 18 report
Ga6Gd	Ga6Gd	-30.14 kJ/mol-atom		model	-31.251 (mp-aaackwju)	-31.82 (oqmd-1484077)	[2] Boukideur 2020 cites De 2014	Table 4, p. 4, row 1 report
GaGd	GaGd	-72.65 kJ/mol-atom	298.15	model	-60.894 (mp-aaaabecv)	-60.055 (oqmd-19090)	[3] Tamim 2023 cites De 1988	Table 2, p. 8, row 23 report
GaGd	GaGd	-72.65 kJ/mol-atom		model	-60.894 (mp-aaaabecv)	-60.055 (oqmd-19090)	[2] Boukideur 2020 cites De 2014	Table 4, p. 4, row 7 report
GaGd	GaGd	-70 kJ/mol-atom		model	-60.894 (mp-aaaabecv)	-60.055 (oqmd-19090)	[2] Boukideur 2020	Table 4, p. 4, row 8 report
GaGd	GaGd	-61.701 kJ/mol-atom	298.15	model	-60.894 (mp-aaaabecv)	-60.055 (oqmd-19090)	[3] Tamim 2023	Table 2, p. 8, row 24 report

Other properties

Phase transition (10)

Phase transition, Ga–Gd system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	302.15 K	302.15	congruent melting: Liq <=> (αGa) (αGa): Gd 0	model	[2] Boukideur 2020	Table 3, p. 4, row 1 report
Phase transition	302.15 K	302.15	congruent melting: Liq <=> (αGa) (αGa): Gd 0	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 3 report
Phase transition	302.15 K	302.15	congruent melting: Liq <=> (αGa) (αGa): Gd 0	experimental	[2] Boukideur 2020 cites Joshua 1981	Table 3, p. 4, row 2 report
Phase transition	1586.15 K	1586.15	congruent melting: Liq <=> (βGd) (βGd): Gd 1	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 29 report
Phase transition	1586.15 K	1586.15	congruent melting: Liq <=> (βGd) (βGd): Gd 1	model	[2] Boukideur 2020	Table 3, p. 4, row 28 report
Phase transition	1673.15 K	1673.15	congruent melting: Liq <=> Ga2Gd Ga2Gd: Gd 0.333	experimental	[2] Boukideur 2020 cites Buschow 1976 doi	Table 3, p. 4, row 12 report
Phase transition	1673.15 K	1673.15	congruent melting: Liq <=> Ga2Gd Ga2Gd: Gd 0.333	experimental	[2] Boukideur 2020 cites Palenzona 1990 doi	Table 3, p. 4, row 13 report
Phase transition	1673.15 K	1673.15	congruent melting: Liq <=> Ga2Gd Ga2Gd: Gd 0.333	model	[2] Boukideur 2020	Table 3, p. 4, row 10 report
Phase transition	1673.15 K	1673.15	congruent melting: Liq <=> Ga2Gd Ga2Gd: Gd 0.333	experimental	[2] Boukideur 2020 cites Joshua 1981	Table 3, p. 4, row 11 report
Phase transition	1673.15 K	1673.15	congruent transformation	experimental	[3] Tamim 2023 cites Pelleg 1981 doi	p. 11 report	The hexagonal Ga2Gd (ɛ) compound melts congruently at 1400°C, and exhibits a wide homogeneity range that extends from the stoichiometric composition to the gallium-rich side Ga2(1+x)Gd1-x [23].

Formation (5)

Formation, Ga–Gd system
Property	Value	Phases / composition	Class	Source	Location
Entropy of formation printed: Entropies of formation	1 J/mol-atom/K	Ga2Gd alloy: Gd 0.333333	model	[2] Boukideur 2020	Table 4, p. 4, row 6 report
Entropy of formation printed: Entropies of formation	9.45 J/mol-atom/K	Ga2Gd3 alloy: Gd 0.6	model	[2] Boukideur 2020	Table 4, p. 4, row 10 report
Entropy of formation printed: Entropies of formation	9 J/mol-atom/K	Ga3Gd5 alloy: Gd 0.625	model	[2] Boukideur 2020	Table 4, p. 4, row 12 report
Entropy of formation printed: Entropies of formation	-5.35 J/mol-atom/K	Ga6Gd alloy: Gd 0.142857	model	[2] Boukideur 2020	Table 4, p. 4, row 2 report
Entropy of formation printed: Entropies of formation	7.23 J/mol-atom/K	GaGd alloy: Gd 0.5	model	[2] Boukideur 2020	Table 4, p. 4, row 8 report

Sources

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

Jinming Liu, Fei Li, Jinping Liu, Xu Zhang, Tahir Ahmad, Tongxiang Liang, Thermodynamic description of the Ce–Ga and Ga–Gd systems, Monatsh Chem 150, 1225-1233 (2019). doi:10.1007/s00706-019-02420-8
M. AiT Boukideur, N. Selhaoui, F.Z. chrifi Alaoui, A. Iddaoudi, K. Achgar, Thermodynamic modeling of the Ga-Gd binary system, Materials Today: Proceedings 24, 71-75 (2020). doi:10.1016/j.matpr.2019.07.598
Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023). doi:10.1016/j.calphad.2023.102596

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}
}