Al–Gd system

43 accepted literature values from 2 paper(s) (model 24, unspecified 19); 2 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (9) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
model	24
unspecified	19

Accepted values by property group
Property group	Values
invariant reaction	28
phase transition	4
crystal structure	11

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
AlGd-03Cac-LB.tdb	G. Cacciamani, S. De Negri, A. Saccone, R. Ferro, Intermetallics, 11, 1135-51(2003). doi:10.1016/S0966-9795(03)00151-1	`b9266d9fc2756bb17576e2ea3746fc1910351ea423602a2001d52662d1608ee3`	viewer · TDB · JSON
AlGd-14Bo.tdb	H. Bo, L.B. Liu, J.L. Hu, X.D. Zhang, Z.P. Jin, Thermochim. Acta, 591, 51-56(2014). doi:10.1016/j.tca.2014.07.014	`1b8130c53b6f0eb953ae25444f889979802d1acac9bc6f8432d235d56f3dcd20`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AlGd-03Cac-LB.tdb	1470.98	LIQUID (x(Gd) 0.91282) + BCC_A2 (x(Gd) 0.99264) + HCP_A3 (x(Gd) 0.99955)
AlGd-03Cac-LB.tdb	1470.98	LIQUID (x(Gd) 0.91281) + BCC_A2 (x(Gd) 0.99264) + HCP_A3 (x(Gd) 0.99955)
AlGd-03Cac-LB.tdb	1403.44	LIQUID (x(Gd) 0.13941) + AL3GD_D019 (x(Gd) 0.25) + C15_LAVES (x(Gd) 0.32403)
AlGd-03Cac-LB.tdb	1403.43	LIQUID (x(Gd) 0.13948) + AL3GD_D019 (x(Gd) 0.25) + C15_LAVES (x(Gd) 0.32404)
AlGd-03Cac-LB.tdb	1340.98	C15_LAVES (x(Gd) 0.36846) + ALGD (x(Gd) 0.5) + LIQUID (x(Gd) 0.55656)
AlGd-03Cac-LB.tdb	1268.58	ALGD (x(Gd) 0.5) + AL2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.60591)
AlGd-03Cac-LB.tdb	1268.57	ALGD (x(Gd) 0.5) + AL2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.60601)
AlGd-03Cac-LB.tdb	1214.3	AL2GD3 (x(Gd) 0.6) + ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.68224)
AlGd-03Cac-LB.tdb	1214.3	AL2GD3 (x(Gd) 0.6) + ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.68191)
AlGd-03Cac-LB.tdb	1214.3	AL2GD3 (x(Gd) 0.6) + ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.68228)
AlGd-03Cac-LB.tdb	1140.98	ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.77074) + HCP_A3 (x(Gd) 0.99986)
AlGd-03Cac-LB.tdb	1140.98	ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.7707) + HCP_A3 (x(Gd) 0.99986)
AlGd-03Cac-LB.tdb	902.82	FCC_A1 (x(Gd) 0) + LIQUID (x(Gd) 0.03224) + AL3GD_D019 (x(Gd) 0.25)
AlGd-03Cac-LB.tdb	902.82	FCC_A1 (x(Gd) 0) + LIQUID (x(Gd) 0.03213) + AL3GD_D019 (x(Gd) 0.25)
AlGd-03Cac-LB.tdb	902.82	FCC_A1 (x(Gd) 0) + LIQUID (x(Gd) 0.03211) + AL3GD_D019 (x(Gd) 0.25)
AlGd-14Bo.tdb	1569.02	HCP_A3 (x(Gd) 1) + LIQUID (x(Gd) 1) + BCC_A2 (x(Gd) 1)
AlGd-14Bo.tdb	1470.74	LIQUID (x(Gd) 0.92625) + BCC_A2 (x(Gd) 0.99289) + HCP_A3 (x(Gd) 0.99982)
AlGd-14Bo.tdb	1470.74	LIQUID (x(Gd) 0.92624) + BCC_A2 (x(Gd) 0.99289) + HCP_A3 (x(Gd) 0.99982)
AlGd-14Bo.tdb	1470.74	LIQUID (x(Gd) 0.92624) + BCC_A2 (x(Gd) 0.99289) + HCP_A3 (x(Gd) 0.99982)
AlGd-14Bo.tdb	1394.63	LIQUID (x(Gd) 0.13488) + AL3GD_D019 (x(Gd) 0.25) + C15_LAVES (x(Gd) 0.32438)
AlGd-14Bo.tdb	1394.63	LIQUID (x(Gd) 0.13482) + AL3GD_D019 (x(Gd) 0.25) + C15_LAVES (x(Gd) 0.32437)
AlGd-14Bo.tdb	1330.21	C15_LAVES (x(Gd) 0.37116) + ALGD (x(Gd) 0.5) + LIQUID (x(Gd) 0.56956)
AlGd-14Bo.tdb	1248.23	ALGD (x(Gd) 0.5) + AL2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.61695)
AlGd-14Bo.tdb	1248.22	ALGD (x(Gd) 0.5) + AL2GD3 (x(Gd) 0.6) + LIQUID (x(Gd) 0.6173)
AlGd-14Bo.tdb	1210.64	AL2GD3 (x(Gd) 0.6) + ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.6674)
AlGd-14Bo.tdb	1210.64	AL2GD3 (x(Gd) 0.6) + ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.66716)
AlGd-14Bo.tdb	1210.64	AL2GD3 (x(Gd) 0.6) + ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.66759)
AlGd-14Bo.tdb	1141.32	ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.76587) + HCP_A3 (x(Gd) 0.99985)
AlGd-14Bo.tdb	1141.32	ALGD2_C37 (x(Gd) 0.66667) + LIQUID (x(Gd) 0.76581) + HCP_A3 (x(Gd) 0.99985)
AlGd-14Bo.tdb	905.67	FCC_A1 (x(Gd) 0) + LIQUID (x(Gd) 0.02751) + AL3GD_D019 (x(Gd) 0.25)
AlGd-14Bo.tdb	905.66	FCC_A1 (x(Gd) 0) + LIQUID (x(Gd) 0.02735) + AL3GD_D019 (x(Gd) 0.25)
AlGd-14Bo.tdb	905.66	FCC_A1 (x(Gd) 0) + LIQUID (x(Gd) 0.02733) + AL3GD_D019 (x(Gd) 0.25)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull AlGd-03Cac-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Al–Gd system (28)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1474	bcc_Gd -> Liquid + hcp_Gd		model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 31 report
1473	bcc_Gd -> Liquid + hcp_Gd	Liquid: Gd 0.905	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 29 report
1471	bcc_Gd -> Liquid + hcp_Gd	bcc_Gd: Gd 0.993; Liquid: Gd 0.913; hcp_Gd: Gd 0.9996	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 30 report
1471	bcc_Gd -> Liquid + hcp_Gd	bcc_Gd: Gd 0.993; Liquid: Gd 0.926; hcp_Gd: Gd 0.9998	model	[1] Bo 2014	Table 2, p. 4, row 32 report
1403	Liquid + Al2Gd -> Al3Gd	Liquid: Gd 0.14; Al2Gd: Gd 0.324; Al3Gd: Gd 0.25	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 6 report
1400	Liquid + Al2Gd -> Al3Gd	Liquid: Gd 0.137; Al2Gd: Gd 0.333; Al3Gd: Gd 0.25	model	[1] Bo 2014	Table 2, p. 4, row 8 report
1398	Liquid + Al2Gd -> Al3Gd	Liquid: Gd 0.16; Al2Gd: Gd 0.333333; Al3Gd: Gd 0.25	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 5 report
1398	Liquid + Al2Gd -> Al3Gd	Al2Gd: Gd 0.333333; Al3Gd: Gd 0.25	model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 7 report
1343	Liquid + Al2Gd -> AlGd	Liquid: Gd 0.559; Al2Gd: Gd 0.333; AlGd: Gd 0.5	model	[1] Bo 2014	Table 2, p. 4, row 16 report
1343	Liquid + Al2Gd -> AlGd	Liquid: Gd 0.56; Al2Gd: Gd 0.333333; AlGd: Gd 0.5	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 13 report
1341	Liquid + Al2Gd -> AlGd	Liquid: Gd 0.557; Al2Gd: Gd 0.368; AlGd: Gd 0.5	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 14 report
1325	Liquid + Al2Gd -> AlGd	Al2Gd: Gd 0.333333; AlGd: Gd 0.5	model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 15 report
1268	Liquid + AlGd -> Al2Gd3	Liquid: Gd 0.606; AlGd: Gd 0.5; Al2Gd3: Gd 0.6	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 18 report
1248	Liquid + AlGd -> Al2Gd3	Liquid: Gd 0.617; AlGd: Gd 0.5; Al2Gd3: Gd 0.6	model	[1] Bo 2014	Table 2, p. 4, row 20 report
1243	Liquid + AlGd -> Al2Gd3	Liquid: Gd 0.69; AlGd: Gd 0.5; Al2Gd3: Gd 0.6	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 17 report
1214	Liquid + Al2Gd3 -> AlGd2	Liquid: Gd 0.683; Al2Gd3: Gd 0.6; AlGd2: Gd 0.667	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 22 report
1213	Liquid + Al2Gd3 -> AlGd2	Liquid: Gd 0.72; Al2Gd3: Gd 0.6; AlGd2: Gd 0.666667	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 21 report
1213	Liquid + AlGd -> Al2Gd3	AlGd: Gd 0.5; Al2Gd3: Gd 0.6	model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 19 report
1211	Liquid + Al2Gd3 -> AlGd2	Liquid: Gd 0.6674; Al2Gd3: Gd 0.6; AlGd2: Gd 0.667	model	[1] Bo 2014	Table 2, p. 4, row 24 report
1187	Liquid + Al2Gd3 -> AlGd2	Al2Gd3: Gd 0.6; AlGd2: Gd 0.666667	model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 23 report
1141	eutectic: Liquid -> AlGd2 + hcp_Gd	Liquid: Gd 0.766; AlGd2: Gd 0.667; hcp_Gd: Gd 0.9998	model	[1] Bo 2014	Table 2, p. 4, row 28 report
1141	eutectic: Liquid -> AlGd2 + hcp_Gd	Liquid: Gd 0.77; AlGd2: Gd 0.667; hcp_Gd: Gd 0.9999	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 26 report
1141	eutectic: Liquid -> AlGd2 + hcp_Gd	AlGd2: Gd 0.666667	model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 27 report
1138	eutectic: Liquid -> AlGd2 + hcp_Gd	Liquid: Gd 0.77; AlGd2: Gd 0.666667	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 25 report
923	eutectic: Liquid -> fcc_Al + Al3Gd	Liquid: Gd 0.05; Al3Gd: Gd 0.25	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 1 report
907	eutectic: Liquid -> fcc_Al + Al3Gd	Al3Gd: Gd 0.25	model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 3 report
906	eutectic: Liquid -> fcc_Al + Al3Gd	Liquid: Gd 0.0274; fcc_Al: Gd 0; Al3Gd: Gd 0.25	model	[1] Bo 2014	Table 2, p. 4, row 4 report
903	eutectic: Liquid -> fcc_Al + Al3Gd	Liquid: Gd 0.032; fcc_Al: Gd 0; Al3Gd: Gd 0.25	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 2 report

Other properties

Phase transition (4)

Phase transition, Al–Gd system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1782 K	1782	Liquid -> Al2Gd Liquid: Gd 0.333; Al2Gd: Gd 0.333	model	[1] Bo 2014 cites Cacciamani 2003 doi	Table 2, p. 4, row 10 report
Phase transition	1793 K	1793	Liquid -> Al2Gd Liquid: Gd 0.333; Al2Gd: Gd 0.333	model	[1] Bo 2014	Table 2, p. 4, row 12 report
Phase transition	1793 K	1793	Liquid -> Al2Gd Liquid: Gd 0.333; Al2Gd: Gd 0.333333	unspecified	[1] Bo 2014 cites Gschneidner 1988 doi	Table 2, p. 4, row 9 report
Phase transition	1800 K	1800	Liquid -> Al2Gd Liquid: Gd 0.333333; Al2Gd: Gd 0.333333	model	[1] Bo 2014 cites Jin 2010 doi	Table 2, p. 4, row 11 report

Crystal structure (11)

Crystal structure, Al–Gd system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	7.906 Å	298.15	Al2Gd	unspecified	[2] Zhang 2009	Table 1, p. 3, row 9 report
Lattice a	8.32 Å	298.15	Al2Gd3	unspecified	[2] Zhang 2009	Table 1, p. 3, row 11 report
Lattice a	6.331 Å	298.15	Al3Gd	unspecified	[2] Zhang 2009	Table 1, p. 3, row 8 report
Lattice a	5.893 Å	298.15	AlGd alloy: Gd 0.5	unspecified	[2] Zhang 2009	Table 1, p. 3, row 10 report
Lattice a	6.742 Å	298.15	AlGd2	unspecified	[2] Zhang 2009	Table 1, p. 3, row 12 report
Lattice b	11.59 Å	298.15	AlGd alloy: Gd 0.5	unspecified	[2] Zhang 2009	Table 1, p. 3, row 10 report
Lattice b	5.254 Å	298.15	AlGd2	unspecified	[2] Zhang 2009	Table 1, p. 3, row 12 report
Lattice c	7.628 Å	298.15	Al2Gd3	unspecified	[2] Zhang 2009	Table 1, p. 3, row 11 report
Lattice c	4.6 Å	298.15	Al3Gd	unspecified	[2] Zhang 2009	Table 1, p. 3, row 8 report
Lattice c	5.695 Å	298.15	AlGd alloy: Gd 0.5	unspecified	[2] Zhang 2009	Table 1, p. 3, row 10 report
Lattice c	9.756 Å	298.15	AlGd2	unspecified	[2] Zhang 2009	Table 1, p. 3, row 12 report

Sources

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

H. Bo, L.B. Liu, J.L. Hu, X.D. Zhang, Z.P. Jin, Thermodynamic re-assessment of the Al–Gd and Gd–Zr systems, Thermochimica Acta 591, 51-56 (2014). doi:10.1016/j.tca.2014.07.014
L.G. Zhang, H.Q. Dong, G.X. Huang, J. Shan, L.B. Liu, Z.P. Jin, Thermodynamic assessment of the Al–Cu–Gd system, Calphad 33, 664-672 (2009). doi:10.1016/j.calphad.2009.08.003

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}
}