Ru–Zr system

28 accepted literature values from 1 paper(s) (experimental 11, model 17); 2 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	11
model	17

Accepted values by property group
Property group	Values
invariant reaction	10
phase transition	4
formation	14

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
RuZr-05Che-LB.tdb	P.-Y. Chevalier, E. Fischer, unpublished work, 2005.	`5b8a10c1760f63f110d2832696dedc7c6fab1b17af0e52f5a7a25bd30475c74c`	viewer · TDB · JSON
RuZr-07Idb.tdb	M. Idbenali, C. Servant, N. Selhaoui, L. Bouirden, J. Phase Equilib. Diffus., 28, 243-49(2007). doi:10.1007/s11669-007-9084-z	`7b022e6cd42b02375b6d2862dc1809c19aebffbb96a5f5ef6d91c5f9268fc2fd`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
RuZr-05Che-LB.tdb	2109.89	LIQUID (x(Zr) 0.29964) + RU2ZR_C14 (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-05Che-LB.tdb	2109.88	LIQUID (x(Zr) 0.29942) + RU2ZR_C14 (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-05Che-LB.tdb	2109.88	LIQUID (x(Zr) 0.29942) + RU2ZR_C14 (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-05Che-LB.tdb	1982.63	HCP_A3 (x(Zr) 0.01995) + LIQUID (x(Zr) 0.21668) + RU2ZR_C14 (x(Zr) 0.33333)
RuZr-05Che-LB.tdb	1982.63	HCP_A3 (x(Zr) 0.01995) + LIQUID (x(Zr) 0.21667) + RU2ZR_C14 (x(Zr) 0.33333)
RuZr-05Che-LB.tdb	1558.48	HCP_A3 (x(Zr) 0.00748) + RU2ZR_C14 (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-05Che-LB.tdb	1558.48	HCP_A3 (x(Zr) 0.00748) + RU2ZR_C14 (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-05Che-LB.tdb	1558.48	HCP_A3 (x(Zr) 0.00747) + RU2ZR_C14 (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-05Che-LB.tdb	1558.48	HCP_A3 (x(Zr) 0.00747) + RU2ZR_C14 (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-05Che-LB.tdb	1494.38	RUZR_B2 (x(Zr) 0.5) + LIQUID (x(Zr) 0.82116) + BCC_A2 (x(Zr) 0.886)
RuZr-05Che-LB.tdb	1494.38	RUZR_B2 (x(Zr) 0.5) + LIQUID (x(Zr) 0.82117) + BCC_A2 (x(Zr) 0.88602)
RuZr-05Che-LB.tdb	944.21	RUZR_B2 (x(Zr) 0.5) + BCC_A2 (x(Zr) 0.9427) + HCP_A3 (x(Zr) 0.99006)
RuZr-05Che-LB.tdb	944.21	RUZR_B2 (x(Zr) 0.5) + BCC_A2 (x(Zr) 0.9427) + HCP_A3 (x(Zr) 0.99006)
RuZr-07Idb.tdb	2068.2	LIQUID (x(Zr) 0.29779) + C14_LAVES (x(Zr) 0.33334) + RUZR_B2 (x(Zr) 0.50003)
RuZr-07Idb.tdb	2068.2	LIQUID (x(Zr) 0.29778) + C14_LAVES (x(Zr) 0.33334) + RUZR_B2 (x(Zr) 0.50003)
RuZr-07Idb.tdb	1951.78	HCP_A3 (x(Zr) 0.01965) + LIQUID (x(Zr) 0.2404) + C14_LAVES (x(Zr) 0.33333)
RuZr-07Idb.tdb	1951.78	HCP_A3 (x(Zr) 0.01964) + LIQUID (x(Zr) 0.24034) + C14_LAVES (x(Zr) 0.33333)
RuZr-07Idb.tdb	1567.76	HCP_A3 (x(Zr) 0.01698) + C14_LAVES (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-07Idb.tdb	1567.76	HCP_A3 (x(Zr) 0.01698) + C14_LAVES (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-07Idb.tdb	1567.76	HCP_A3 (x(Zr) 0.01698) + C14_LAVES (x(Zr) 0.33333) + RUZR_B2 (x(Zr) 0.5)
RuZr-07Idb.tdb	1546.12	RUZR_B2 (x(Zr) 0.51181) + LIQUID (x(Zr) 0.79015) + BCC_A2 (x(Zr) 0.87403)
RuZr-07Idb.tdb	697.39	RUZR_B2 (x(Zr) 0.5005) + BCC_A2 (x(Zr) 0.89252) + HCP_A3 (x(Zr) 0.99779)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull RuZr-05Che-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ru–Zr system (10)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2098.15	Ru2Zr -> Liq+ RuZr	Ru2Zr: Zr 0.33; L: Zr 0.31; RuZr: Zr 0.485	experimental	[1] Idbenali 2007 cites Okamoto 1993 doi	Table 4, p. 5, row 3 report
2098.15	Ru2Zr -> Liq+ RuZr	Ru2Zr: Zr 0.3223; L: Zr 0.3013; RuZr: Zr 0.4874	model	[1] Idbenali 2007	Table 4, p. 5, row 4 report
1988.15	eutectic: Liq -> (Ru) + Ru2Zr	L: Zr 0.22; (Ru): Zr 0.019; Ru2Zr: Zr 0.32	experimental	[1] Idbenali 2007 cites Okamoto 1993 doi	Table 4, p. 5, row 1 report
1988.15	eutectic: Liq -> (Ru) + Ru2Zr	L: Zr 0.2336; (Ru): Zr 0.0181; Ru2Zr: Zr 0.3111	model	[1] Idbenali 2007	Table 4, p. 5, row 2 report
1558.15	Ru2Zr -> (Ru) + RuZr	Ru2Zr: Zr 0.3208; (Ru): Zr 0.0161; RuZr: Zr 0.478	model	[1] Idbenali 2007	Table 4, p. 5, row 12 report
1558.15	Ru2Zr -> (Ru) + RuZr	Ru2Zr: Zr 0.33; (Ru): Zr 0.01; RuZr: Zr 0.48	experimental	[1] Idbenali 2007 cites Okamoto 1993 doi	Table 4, p. 5, row 11 report
1514.15	RuZr + β(Zr) -> Liq	RuZr: Zr 0.5119; β(Zr): Zr 0.8892; L: Zr 0.7942	model	[1] Idbenali 2007	Table 4, p. 5, row 8 report
1513.15	RuZr + β(Zr) -> Liq	RuZr: Zr 0.52; β(Zr): Zr 0.89; L: Zr 0.79	experimental	[1] Idbenali 2007 cites Okamoto 1993 doi	Table 4, p. 5, row 7 report
773.15	β(Zr) -> α(Zr) + RuZr	β(Zr): Zr 0.92; α(Zr): Zr 0.99; RuZr: Zr 0.51	experimental	[1] Idbenali 2007 cites Okamoto 1993 doi	Table 4, p. 5, row 9 report
772.75	β(Zr) -> α(Zr) + RuZr	β(Zr): Zr 0.9064; α(Zr): Zr 0.9948; RuZr: Zr 0.501	model	[1] Idbenali 2007	Table 4, p. 5, row 10 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, Ru–Zr system (14)
Phase	Value	T (K)	Class	Source	Location
Ru2Zr	-78 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites F 1988	Table 1, p. 2, row 12 report
Ru2Zr	-49 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites Colinet 1985 doi	Table 1, p. 2, row 11 report
Ru2Zr	-32.08 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites Mahdouk 1997 doi	Table 1, p. 2, row 13 report
Ru2Zr	-32 kJ/mol (basis unstated) ± 0.9	1743	experimental	[1] Idbenali 2007 cites Mahdouk 1997 doi	Table 1, p. 2, row 10 report
Ru2Zr	-31.97 kJ/mol (basis unstated)	1743	model	[1] Idbenali 2007	Table 1, p. 2, row 14 report
RuZr	-88 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites Guo 2001 doi	Table 1, p. 2, row 7 report
RuZr	-88 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites F 1988	Table 1, p. 2, row 5 report
RuZr	-68.7 kJ/mol (basis unstated)	298.15	experimental	[1] Idbenali 2007 cites Topor 1988 doi	Table 1, p. 2, row 6 report
RuZr	-68.65 kJ/mol (basis unstated) ± 2.5	298.15	experimental	[1] Idbenali 2007 cites Topor 1989 doi	Table 1, p. 2, row 2 report
RuZr	-61 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites Watson 1988 doi	Table 1, p. 2, row 4 report
RuZr	-55.95 kJ/mol (basis unstated)	1753	model	[1] Idbenali 2007	Table 1, p. 2, row 9 report
RuZr	-55.8 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites Mahdouk 1997 doi	Table 1, p. 2, row 8 report
RuZr	-55.8 kJ/mol (basis unstated) ± 2.3	1753	experimental	[1] Idbenali 2007 cites Mahdouk 1997 doi	Table 1, p. 2, row 1 report
RuZr	-53 kJ/mol (basis unstated)		model	[1] Idbenali 2007 cites Colinet 1985 doi	Table 1, p. 2, row 3 report

Other properties

Phase transition (4)

Phase transition, Ru–Zr system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	2128 K	2128	congruent transformation	experimental	[1] Idbenali 2007 cites Eremenko 1988	p. 5 report	The congruent melting of RuZr calculated at 2131K and x(Zr) = 0.5 is in very good agreement with the experimental data of Eremenko et al.[3] (2128 K and x(Zr) = 0.494).
Phase transition	2131 K	2131	congruent transformation	model	[1] Idbenali 2007	p. 5 report	The congruent melting of RuZr calculated at 2131K and x(Zr) = 0.5 is in very good agreement with the experimental data of Eremenko et al.[3] (2128 K and x(Zr) = 0.494).
Phase transition	2403.15 K	2403.15	Liq -> RuZr L: Zr 0.5; RuZr: Zr 0.5	experimental	[1] Idbenali 2007 cites Okamoto 1993 doi	Table 4, p. 5, row 5 report
Phase transition	2404.15 K	2404.15	Liq -> RuZr L: Zr 0.5; RuZr: Zr 0.5	model	[1] Idbenali 2007	Table 4, p. 5, row 6 report

Sources

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

M. Idbenali, C. Servant, N. Selhaoui, L. Bouirden, Thermodynamic Assessment of the Ru-Zr Binary System, J Phs Eqil and Diff 28, 243-249 (2007). doi:10.1007/s11669-007-9084-z

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}
}