Th–Zn system

29 accepted literature values from 1 paper(s) (experimental 19, model 10); 1 calculated phase diagram(s).

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

Accepted values by evidence class
Evidence class	Values
experimental	19
model	10

Accepted values by property group
Property group	Values
invariant reaction	17
phase transition	12

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
ThZn-10Li.tdb	Z.S. Li, X.J. Liu, M.Z. Wen, C.P. Wang, A.T. Tang, F.S. Pan, J. Nucl. Mater., 396, 170-75(2010). doi:10.1016/j.jnucmat.2009.10.068	`f6e94ddb75cfa754d4b024b74d1f2e5fafb57ef1405bdfc68137d16b2e88e863`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
ThZn-10Li.tdb	1631.66	FCC_A1 (x(Zn) 0.00196) + BCC_A2 (x(Zn) 0.00222) + LIQUID (x(Zn) 0.14785)
ThZn-10Li.tdb	1316.1	FCC_A1 (x(Zn) 0.00135) + LIQUID (x(Zn) 0.28142) + TH2ZN_C16 (x(Zn) 0.33333)
ThZn-10Li.tdb	1316.1	FCC_A1 (x(Zn) 0.00135) + LIQUID (x(Zn) 0.28154) + TH2ZN_C16 (x(Zn) 0.33333)
ThZn-10Li.tdb	1312.11	THZN2 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.73893) + THZN4_D13 (x(Zn) 0.8)
ThZn-10Li.tdb	1312.11	THZN2 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.73903) + THZN4_D13 (x(Zn) 0.8)
ThZn-10Li.tdb	1312.11	THZN2 (x(Zn) 0.66667) + LIQUID (x(Zn) 0.73879) + THZN4_D13 (x(Zn) 0.8)
ThZn-10Li.tdb	1271.16	THZN4_D13 (x(Zn) 0.8) + LIQUID (x(Zn) 0.8669) + TH2ZN17 (x(Zn) 0.89474)
ThZn-10Li.tdb	1271.16	THZN4_D13 (x(Zn) 0.8) + LIQUID (x(Zn) 0.86673) + TH2ZN17 (x(Zn) 0.89474)
ThZn-10Li.tdb	1217.32	TH2ZN_C16 (x(Zn) 0.33333) + LIQUID (x(Zn) 0.49951) + THZN2 (x(Zn) 0.66667)
ThZn-10Li.tdb	692.67	TH2ZN17 (x(Zn) 0.89474) + LIQUID (x(Zn) 0.99999) + HCP_A3 (x(Zn) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Th–Zn system (17)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1633.15	metatectic/catatectic: βTh ↔ αTh + L	βTh: Zn 0; αTh: Zn 0	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 1 report
1631.65	metatectic/catatectic: βTh ↔ αTh + L	βTh: Zn 0.0022; αTh: Zn 0.002; L: Zn 0.148	model	[1] Li 2010	Table 5, p. 5, row 2 report
1318.15	eutectic: L M ThZn4+ Th2Zn17		experimental	[1] Li 2010	p. 3 report	Five eutectic reactions of the L M aTh + Th2Zn, L M ThZn2+ ThZn4, L M ThZn4+ Th2Zn17, L M Th2Zn + ThZn2 and L M Th2Zn17 + Zn exist in this system with the following eutectic temperatures and Zn atom percentages: 1040 °C and 30.5 at.% Zn, 945 °C and 48.6 at.% Zn, 1045 °C and 74.4 at.% Zn, 995 °C and 86.8 at.% Zn, 419.58 °C and 0 at.% Zn.
1318.15	eutectic: L ↔ ThZn2 + ThZn4	L: Zn 0.744; ThZn2: Zn 0.667; ThZn4: Zn 0.8	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 5 report
1317.15	eutectic: L ↔ αTh + Th2Zn	L: Zn 0.281; αTh: Zn 0.0014; Th2Zn: Zn 0.333	model	[1] Li 2010	Table 5, p. 5, row 4 report
1314.15	eutectic: L ↔ ThZn2 + ThZn4	L: Zn 0.74; ThZn2: Zn 0.667; ThZn4: Zn 0.8	model	[1] Li 2010	Table 5, p. 5, row 6 report
1313.15	eutectic: L M aTh + Th2Zn		experimental	[1] Li 2010	p. 3 report	Five eutectic reactions of the L M aTh + Th2Zn, L M ThZn2+ ThZn4, L M ThZn4+ Th2Zn17, L M Th2Zn + ThZn2 and L M Th2Zn17 + Zn exist in this system with the following eutectic temperatures and Zn atom percentages: 1040 °C and 30.5 at.% Zn, 945 °C and 48.6 at.% Zn, 1045 °C and 74.4 at.% Zn, 995 °C and 86.8 at.% Zn, 419.58 °C and 0 at.% Zn.
1313.15	eutectic: L ↔ αTh + Th2Zn	L: Zn 0.305; αTh: Zn 0; Th2Zn: Zn 0.333	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 3 report
1272.15	eutectic: L ↔ ThZn4 + Th2Zn17	L: Zn 0.867; ThZn4: Zn 0.8; Th2Zn17: Zn 0.895	model	[1] Li 2010	Table 5, p. 5, row 8 report
1268.15	eutectic: L M Th2Zn + ThZn2		experimental	[1] Li 2010	p. 3 report	Five eutectic reactions of the L M aTh + Th2Zn, L M ThZn2+ ThZn4, L M ThZn4+ Th2Zn17, L M Th2Zn + ThZn2 and L M Th2Zn17 + Zn exist in this system with the following eutectic temperatures and Zn atom percentages: 1040 °C and 30.5 at.% Zn, 945 °C and 48.6 at.% Zn, 1045 °C and 74.4 at.% Zn, 995 °C and 86.8 at.% Zn, 419.58 °C and 0 at.% Zn.
1268.15	eutectic: L ↔ ThZn4 + Th2Zn17	L: Zn 0.868; ThZn4: Zn 0.8; Th2Zn17: Zn 0.895	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 7 report
1218.15	eutectic: L ↔ Th2Zn + ThZn2	L: Zn 0.486; Th2Zn: Zn 0.333; ThZn2: Zn 0.667	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 9 report
1218.15	eutectic: L M ThZn2+ ThZn4		experimental	[1] Li 2010	p. 3 report	Five eutectic reactions of the L M aTh + Th2Zn, L M ThZn2+ ThZn4, L M ThZn4+ Th2Zn17, L M Th2Zn + ThZn2 and L M Th2Zn17 + Zn exist in this system with the following eutectic temperatures and Zn atom percentages: 1040 °C and 30.5 at.% Zn, 945 °C and 48.6 at.% Zn, 1045 °C and 74.4 at.% Zn, 995 °C and 86.8 at.% Zn, 419.58 °C and 0 at.% Zn.
1218.15	eutectic: L ↔ Th2Zn + ThZn2	L: Zn 0.499; Th2Zn: Zn 0.333; ThZn2: Zn 0.667	model	[1] Li 2010	Table 5, p. 5, row 10 report
692.73	eutectic: L M Th2Zn17 + Zn		experimental	[1] Li 2010	p. 3 report	Five eutectic reactions of the L M aTh + Th2Zn, L M ThZn2+ ThZn4, L M ThZn4+ Th2Zn17, L M Th2Zn + ThZn2 and L M Th2Zn17 + Zn exist in this system with the following eutectic temperatures and Zn atom percentages: 1040 °C and 30.5 at.% Zn, 945 °C and 48.6 at.% Zn, 1045 °C and 74.4 at.% Zn, 995 °C and 86.8 at.% Zn, 419.58 °C and 0 at.% Zn.
692.73	eutectic: L ↔ Th2Zn17 + (Zn)	L: Zn 1; Th2Zn17: Zn 0.895; (Zn): Zn 1	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 11 report
692.67	eutectic: L ↔ Th2Zn17 + (Zn)	L: Zn 1; Th2Zn17: Zn 0.895; (Zn): Zn 1	model	[1] Li 2010	Table 5, p. 5, row 12 report

Other properties

Phase transition (12)

Phase transition, Th–Zn system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1287.15 K	1287.15	congruent melting: L ↔ Th2Zn17 L: Zn 0.895; Th2Zn17: Zn 0.895	model	[1] Li 2010	Table 5, p. 5, row 20 report
Phase transition	1288.15 K	1288.15	Th2Zn17	experimental	[1] Li 2010	p. 3 report	and vapor pressure method, and found that the melting points of these compounds (Th2Zn, ThZn2, ThZn4 and Th2Zn17) under constrained vapor conditions were 1055 °C, 1105 °C, 1095 °C and 1015 °C, respectively.
Phase transition	1288.15 K	1288.15	congruent melting: L ↔ Th2Zn17 L: Zn 0.895; Th2Zn17: Zn 0.895	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 19 report
Phase transition	1325.15 K	1325.15	congruent melting: L ↔ Th2Zn L: Zn 0.333; Th2Zn: Zn 0.333	model	[1] Li 2010	Table 5, p. 5, row 14 report
Phase transition	1328.15 K	1328.15	Th2Zn	experimental	[1] Li 2010	p. 3 report	and vapor pressure method, and found that the melting points of these compounds (Th2Zn, ThZn2, ThZn4 and Th2Zn17) under constrained vapor conditions were 1055 °C, 1105 °C, 1095 °C and 1015 °C, respectively.
Phase transition	1328.15 K	1328.15	congruent melting: L ↔ Th2Zn L: Zn 0.333; Th2Zn: Zn 0.333	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 13 report
Phase transition	1368.15 K	1368.15	ThZn4	experimental	[1] Li 2010	p. 3 report	and vapor pressure method, and found that the melting points of these compounds (Th2Zn, ThZn2, ThZn4 and Th2Zn17) under constrained vapor conditions were 1055 °C, 1105 °C, 1095 °C and 1015 °C, respectively.
Phase transition	1368.15 K	1368.15	congruent melting: L ↔ ThZn4 L: Zn 0.8; ThZn4: Zn 0.8	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 17 report
Phase transition	1371.15 K	1371.15	congruent melting: L ↔ ThZn4 L: Zn 0.8; ThZn4: Zn 0.8	model	[1] Li 2010	Table 5, p. 5, row 18 report
Phase transition	1378.15 K	1378.15	ThZn2	experimental	[1] Li 2010	p. 3 report	and vapor pressure method, and found that the melting points of these compounds (Th2Zn, ThZn2, ThZn4 and Th2Zn17) under constrained vapor conditions were 1055 °C, 1105 °C, 1095 °C and 1015 °C, respectively.
Phase transition	1378.15 K	1378.15	congruent melting: L ↔ ThZn2 L: Zn 0.667; ThZn2: Zn 0.667	experimental	[1] Li 2010 cites Okamoto 2000	Table 5, p. 5, row 15 report
Phase transition	1378.15 K	1378.15	congruent melting: L ↔ ThZn2 L: Zn 0.667; ThZn2: Zn 0.667	model	[1] Li 2010	Table 5, 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).

Z.S. Li, X.J. Liu, M.Z. Wen, C.P. Wang, A.T. Tang, F.S. Pan, Thermodynamic assessments of the Al–Th and Th–Zn systems, Journal of Nuclear Materials 396, 170-175 (2010). doi:10.1016/j.jnucmat.2009.10.068

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}
}