Gd–Tl system

38 accepted literature values from 1 paper(s) (experimental 12, model 26); 1 calculated phase diagram(s). 14 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 (9) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	12
model	26

Accepted values by property group
Property group	Values
invariant reaction	21
phase transition	9
formation	8

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
GdTl-10Guo.tdb	C. Guo, C. Li, Z. Du, J. Alloys Compd., 492, 122-27(2010). doi:10.1016/j.jallcom.2009.11.101	`81d605effa4ab98fd88a5676215b5b301a7226404f113f84a8d4bc2b77d2d23d`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GdTl-10Guo.tdb	1473.01	GD5TL3_D88 (x(Tl) 0.39564) + LIQUID (x(Tl) 0.42548) + B2_BCC (x(Tl) 0.48517)
GdTl-10Guo.tdb	1473.01	GD5TL3_D88 (x(Tl) 0.39563) + LIQUID (x(Tl) 0.42548) + B2_BCC (x(Tl) 0.48518)
GdTl-10Guo.tdb	1327.69	LIQUID (x(Tl) 0.26664) + GD2TL_B82 (x(Tl) 0.33333) + GD5TL3_D88 (x(Tl) 0.37525)
GdTl-10Guo.tdb	1322.75	B2_BCC (x(Tl) 0.51158) + GD3TL5 (x(Tl) 0.625) + LIQUID (x(Tl) 0.62526)
GdTl-10Guo.tdb	1243.41	GD3TL5 (x(Tl) 0.625) + LIQUID (x(Tl) 0.70691) + GDTL3_L12 (x(Tl) 0.75)
GdTl-10Guo.tdb	1243.41	GD3TL5 (x(Tl) 0.625) + LIQUID (x(Tl) 0.70695) + GDTL3_L12 (x(Tl) 0.75)
GdTl-10Guo.tdb	1243.41	GD3TL5 (x(Tl) 0.625) + LIQUID (x(Tl) 0.70684) + GDTL3_L12 (x(Tl) 0.75)
GdTl-10Guo.tdb	1193.13	B2_BCC (x(Tl) 0.13929) + LIQUID (x(Tl) 0.20472) + GD2TL_B82 (x(Tl) 0.33333)
GdTl-10Guo.tdb	1193.13	B2_BCC (x(Tl) 0.13927) + LIQUID (x(Tl) 0.2047) + GD2TL_B82 (x(Tl) 0.33333)
GdTl-10Guo.tdb	1193.13	BCC_A2 (x(Tl) 0.13927) + LIQUID (x(Tl) 0.2047) + GD2TL_B82 (x(Tl) 0.33333)
GdTl-10Guo.tdb	1143.02	HCP_A3 (x(Tl) 0.07174) + B2_BCC (x(Tl) 0.13004) + GD2TL_B82 (x(Tl) 0.33333)
GdTl-10Guo.tdb	1143.02	HCP_A3 (x(Tl) 0.0717) + BCC_A2 (x(Tl) 0.12997) + GD2TL_B82 (x(Tl) 0.33333)
GdTl-10Guo.tdb	1143.02	HCP_A3 (x(Tl) 0.0717) + B2_BCC (x(Tl) 0.12997) + GD2TL_B82 (x(Tl) 0.33333)
GdTl-10Guo.tdb	576.23	GDTL3_L12 (x(Tl) 0.75) + LIQUID (x(Tl) 0.99883) + B2_BCC (x(Tl) 0.99998)
GdTl-10Guo.tdb	506.98	GDTL3_L12 (x(Tl) 0.75) + HCP_A3 (x(Tl) 1) + B2_BCC (x(Tl) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Gd–Tl system (21)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1473	eutectic: liq. -> Gd5Tl3 + GdTl	L: Tl 0.4262; Gd5Tl3: Tl 0.3956; GdTl: Tl 0.488	model	[1] Guo 2010	Table 4, p. 5, row 14 report
1473	eutectic: liq. -> Gd5Tl3 + GdTl	L: Tl 0.4; Gd5Tl3: Tl 0.375; GdTl: Tl 0.5	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 15 report
1473	eutectic: liq. -> Gd5Tl3 + GdTl	L: Tl 0.4255; Gd5Tl3: Tl 0.3956; GdTl: Tl 0.4852	model	[1] Guo 2010	Table 4, p. 5, row 13 report
1328	liq. + Gd5Tl3 -> Gd2Tl	L: Tl 0.263; Gd5Tl3: Tl 0.375; Gd2Tl: Tl 0.333333	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 9 report
1328	liq. + Gd5Tl3 -> Gd2Tl	L: Tl 0.2665; Gd5Tl3: Tl 0.3752; Gd2Tl: Tl 0.333333	model	[1] Guo 2010	Table 4, p. 5, row 8 report
1328	liq. + Gd5Tl3 -> Gd2Tl	L: Tl 0.2666; Gd5Tl3: Tl 0.3752; Gd2Tl: Tl 0.333333	model	[1] Guo 2010	Table 4, p. 5, row 7 report
1323	liq. + GdTl -> Gd3Tl5	L: Tl 0.5116; GdTl: Tl 0.5; Gd3Tl5: Tl 0.6253	model	[1] Guo 2010	Table 4, p. 5, row 19 report
1323	liq. + GdTl -> Gd3Tl5	L: Tl 0.515; GdTl: Tl 0.5; Gd3Tl5: Tl 0.625	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 21 report
1322	liq. + GdTl -> Gd3Tl5	L: Tl 0.5145; GdTl: Tl 0.5; Gd3Tl5: Tl 0.6265	model	[1] Guo 2010	Table 4, p. 5, row 20 report
1243	eutectic: liq. -> Gd3Tl5 + GdTl3	L: Tl 0.7069; Gd3Tl5: Tl 0.625; GdTl3: Tl 0.75	model	[1] Guo 2010	Table 4, p. 5, row 22 report
1243	eutectic: liq. -> Gd3Tl5 + GdTl3	L: Tl 0.715; Gd3Tl5: Tl 0.625; GdTl3: Tl 0.75	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 24 report
1243	eutectic: liq. -> Gd3Tl5 + GdTl3	L: Tl 0.7071; Gd3Tl5: Tl 0.625; GdTl3: Tl 0.75	model	[1] Guo 2010	Table 4, p. 5, row 23 report
1193	eutectic: liq. -> bcc + Gd2Tl	L: Tl 0.23; bcc: Tl 0.145; Gd2Tl: Tl 0.333333	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 6 report
1193	eutectic: liq. -> bcc + Gd2Tl	L: Tl 0.2053; bcc: Tl 0.1363; Gd2Tl: Tl 0.333333	model	[1] Guo 2010	Table 4, p. 5, row 5 report
1193	eutectic: liq. -> bcc + Gd2Tl	L: Tl 0.2047; bcc: Tl 0.1393; Gd2Tl: Tl 0.333333	model	[1] Guo 2010	Table 4, p. 5, row 4 report
1143	bcc -> hcp + Gd2Tl	bcc: Tl 0.13; hcp: Tl 0.0717; Gd2Tl: Tl 0.333333	model	[1] Guo 2010	Table 4, p. 5, row 1 report
1143	bcc -> hcp + Gd2Tl	bcc: Tl 0.1281; hcp: Tl 0.0755; Gd2Tl: Tl 0.333333	model	[1] Guo 2010	Table 4, p. 5, row 2 report
1143	bcc -> hcp + Gd2Tl	bcc: Tl 0.053; hcp: Tl 0.137; Gd2Tl: Tl 0.333333	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 3 report
576	eutectic: liq. -> GdTl3 + bcc	L: Tl 0.9989; GdTl3: Tl 0.9999	model	[1] Guo 2010	Table 4, p. 5, row 29 report
576	eutectic: liq. -> GdTl3 + bcc	L: Tl 0.9988; GdTl3: Tl 1	model	[1] Guo 2010	Table 4, p. 5, row 28 report
576	eutectic: liq. -> GdTl3 + bcc	L: Tl 0.999; GdTl3: Tl 1	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, 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, Gd–Tl system (8)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location	Quote
Gd2Tl	Gd2Tl	-54.4 kJ/mol-atom	298.15	model	-29.904 (mp-aaabgzlk)	-26.624 (oqmd-1800585)	[1] Guo 2010	p. 1 report	In the present work, the enthalpies of formation of compounds Gd2 Tl, Gd5 Tl3 , GdTl, Gd3 Tl5 , and GdTl3 at 298 K were predicted using revised Miedema model [13], in kJ/mol of atoms: Gd2 Tl -54.4, Gd5 Tl3 -59.2, GdTl -65.8, Gd3 Tl5 -59.05 and GdTl3 -42.06.
Gd3Tl5	Gd3Tl5	-59.05 kJ/mol-atom	298.15	model		-31.319 (oqmd-2027112)	[1] Guo 2010	p. 1 report	In the present work, the enthalpies of formation of compounds Gd2 Tl, Gd5 Tl3 , GdTl, Gd3 Tl5 , and GdTl3 at 298 K were predicted using revised Miedema model [13], in kJ/mol of atoms: Gd2 Tl -54.4, Gd5 Tl3 -59.2, GdTl -65.8, Gd3 Tl5 -59.05 and GdTl3 -42.06.
Gd5Tl3	Gd5Tl3	-59.2 kJ/mol-atom	298.15	model		-30.501 (oqmd-1796173)	[1] Guo 2010	p. 1 report	In the present work, the enthalpies of formation of compounds Gd2 Tl, Gd5 Tl3 , GdTl, Gd3 Tl5 , and GdTl3 at 298 K were predicted using revised Miedema model [13], in kJ/mol of atoms: Gd2 Tl -54.4, Gd5 Tl3 -59.2, GdTl -65.8, Gd3 Tl5 -59.05 and GdTl3 -42.06.
GdTl	GdTl	-65.8 kJ/mol-atom	298.15	model	-36.705 (mp-aaaabdny)	-35.168 (oqmd-30426)	[1] Guo 2010	p. 1 report	In the present work, the enthalpies of formation of compounds Gd2 Tl, Gd5 Tl3 , GdTl, Gd3 Tl5 , and GdTl3 at 298 K were predicted using revised Miedema model [13], in kJ/mol of atoms: Gd2 Tl -54.4, Gd5 Tl3 -59.2, GdTl -65.8, Gd3 Tl5 -59.05 and GdTl3 -42.06.
GdTl3	GdTl3	-42.06 kJ/mol-atom	298.15	model	-24.45 (mp-aaaabeip)	-23.932 (oqmd-30424)	[1] Guo 2010	p. 4 report	The enthalpy of formation of the compound GdTl3 at 298 K were determined by Palenzona and Cirafici [11] and Demykina et al. [12]. Because the enthalpy of formation -42.06 kJ/mol of atoms for GdTl3 predicted by the revised Miedema model is more exothermic than the experimental results -36.8 and -36.4 kJ/mol of atoms [11,12], in the present work, the experimental data determined by Palenzona and Ci…
GdTl3	GdTl3	-42.06 kJ/mol-atom	298.15	model	-24.45 (mp-aaaabeip)	-23.932 (oqmd-30424)	[1] Guo 2010	p. 1 report	In the present work, the enthalpies of formation of compounds Gd2 Tl, Gd5 Tl3 , GdTl, Gd3 Tl5 , and GdTl3 at 298 K were predicted using revised Miedema model [13], in kJ/mol of atoms: Gd2 Tl -54.4, Gd5 Tl3 -59.2, GdTl -65.8, Gd3 Tl5 -59.05 and GdTl3 -42.06.
GdTl3	GdTl3	-36.8 kJ/mol-atom	298.15	experimental	-24.45 (mp-aaaabeip)	-23.932 (oqmd-30424)	[1] Guo 2010 cites Palenzona 1974 doi	p. 4 report	The enthalpy of formation of the compound GdTl3 at 298 K were determined by Palenzona and Cirafici [11] and Demykina et al. [12]. Because the enthalpy of formation -42.06 kJ/mol of atoms for GdTl3 predicted by the revised Miedema model is more exothermic than the experimental results -36.8 and -36.4 kJ/mol of atoms [11,12], in the present work, the experimental data determined by Palenzona and Ci…
GdTl3	GdTl3	-36.4 kJ/mol-atom	298.15	experimental	-24.45 (mp-aaaabeip)	-23.932 (oqmd-30424)	[1] Guo 2010 cites Demykina 1980	p. 4 report	The enthalpy of formation of the compound GdTl3 at 298 K were determined by Palenzona and Cirafici [11] and Demykina et al. [12]. Because the enthalpy of formation -42.06 kJ/mol of atoms for GdTl3 predicted by the revised Miedema model is more exothermic than the experimental results -36.8 and -36.4 kJ/mol of atoms [11,12], in the present work, the experimental data determined by Palenzona and Ci…

Other properties

Phase transition (9)

Phase transition, Gd–Tl system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1263 K	1263	liq. -> GdTl3 GdTl3: Tl 0.75	model	[1] Guo 2010	Table 4, p. 5, row 26 report
Phase transition	1263 K	1263	liq. -> GdTl3 GdTl3: Tl 0.75	model	[1] Guo 2010	Table 4, p. 5, row 25 report
Phase transition	1263 K	1263	liq. -> GdTl3 GdTl3: Tl 0.75	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 27 report
Phase transition	1493 K	1493	liq. -> Gd5Tl3 L: Tl 0.3842; Gd5Tl3: Tl 0.3842	model	[1] Guo 2010	Table 4, p. 5, row 10 report
Phase transition	1493 K	1493	liq. -> Gd5Tl3 L: Tl 0.375; Gd5Tl3: Tl 0.375	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 12 report
Phase transition	1493 K	1493	liq. -> Gd5Tl3 L: Tl 0.3841; Gd5Tl3: Tl 0.3841	model	[1] Guo 2010	Table 4, p. 5, row 11 report
Phase transition	1543 K	1543	liq. -> GdTl L: Tl 0.5; GdTl: Tl 0.5	experimental	[1] Guo 2010 cites Delfino 1983 doi	Table 4, p. 5, row 18 report
Phase transition	1543 K	1543	liq. -> GdTl L: Tl 0.4984; GdTl: Tl 0.4984	model	[1] Guo 2010	Table 4, p. 5, row 17 report
Phase transition	1543 K	1543	liq. -> GdTl L: Tl 0.4977; GdTl: Tl 0.4977	model	[1] Guo 2010	Table 4, p. 5, row 16 report

Sources

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

Cuiping Guo, Changrong Li, Zhenmin Du, A thermodynamic modeling of the Gd–Tl system, Journal of Alloys and Compounds 492, 122-127 (2010). doi:10.1016/j.jallcom.2009.11.101

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}
}