Ru–Zr phases

7 phases (tier A 6, liquid 1); 6 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · Ru–Zr system page · Markdown · field reference

Phases of the Ru–Zr system (7)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ru-zr:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 697.39–3999.38 K, x(Zr) 0.87403–1	4	2
C14_LAVES phase:ru-zr:c14-laves	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1567.76–2068.2 K, x(Zr) 0.33333–0.33334	11	1
FCC_A1 phase:ru-zr:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
HCP_A3 phase:ru-zr:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2620.93 K, x(Zr) 0–1	6	2
LIQUID phase:ru-zr:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1494.38–4000 K, x(Zr) 0–1	10	2
RU2ZR_C14 phase:ru-zr:ru2zr-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1558.48–2109.89 K, x(Zr) 0.33333–0.33333	0	1
RUZR_B2 phase:ru-zr:ruzr-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2401.63 K, x(Zr) 0.5–0.51181	19	2

BCC_A2 (Ru–Zr)

Id: phase:ru-zr:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 697.39–3999.38 K, x(Zr) 0.87403–1
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ru-zr:bcc-a2
paper: paper:10.1007/s11669-007-9084-z:β(Zr)
tdb: tdb:RuZr-05Che-LB.tdb:BCC_A2, tdb:RuZr-07Idb.tdb:BCC_A2

TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

RuZr-05Che-LB.tdb: BCC_A2, type code %B, sha256 5b8a10c1760f63f1…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : RU ZR% : VA : !

RuZr-07Idb.tdb: BCC_A2, type code %B, sha256 7b022e6cd42b0237…

39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : RU ZR% : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-007-9084-z 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).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667814 H. Okamoto, The Ru-Zr system (ruthenium-zirconium), JPE 14, 225-227 (1993).
cited as the source of values for this phase

C14_LAVES (Ru–Zr)

Id: phase:ru-zr:c14-laves; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in RuZr-07Idb.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 1567.76–2068.2 K, x(Zr) 0.33333–0.33334
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ru-zr:c14-laves
paper: paper:10.1007/s11669-007-9084-z:Ru2Zr
tdb: tdb:RuZr-07Idb.tdb:C14_LAVES

TDB models of C14_LAVES (1): PHASE and CONSTITUENT statements as written

RuZr-07Idb.tdb: C14_LAVES, type code %, sha256 7b022e6cd42b0237…

49: PHASE C14_LAVES % 2 2 1 !
50: CONST C14_LAVES : RU% ZR : RU ZR% : !

Example references (4 of 4; assessments first):

doi:10.1007/s11669-007-9084-z 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).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667814 H. Okamoto, The Ru-Zr system (ruthenium-zirconium), JPE 14, 225-227 (1993).
cited as the source of values for this phase
doi:10.1016/s0966-9795(96)00069-6 K. Mahdouk, K. Elaissaoui, J. Charles, L. Bouirden, and J.-C. Gachon, Calorimetric Study and Optimization of the Ruthenium-Zirconium Phase Diagram, Intermetallics, 1997, 5, p 111-116
cited as the source of values for this phase
doi:10.1016/0364-5916(85)90032-x C. Colinet, A. Pasturel, P. Hicter, Calphad 9 (1985) 71–99.
cited as the source of values for this phase

FCC_A1 (Ru–Zr)

Id: phase:ru-zr:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: not stable in 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ru-zr:fcc-a1
tdb: tdb:RuZr-05Che-LB.tdb:FCC_A1, tdb:RuZr-07Idb.tdb:FCC_A1

TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

RuZr-05Che-LB.tdb: FCC_A1, type code %A, sha256 5b8a10c1760f63f1…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : RU ZR : VA : !

RuZr-07Idb.tdb: FCC_A1, type code %A, sha256 7b022e6cd42b0237…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : RU ZR : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-007-9084-z 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).
assessment that models this phase

HCP_A3 (Ru–Zr)

Id: phase:ru-zr:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 300–2620.93 K, x(Zr) 0–1
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ru-zr:hcp-a3
paper: paper:10.1007/s11669-007-9084-z:(Ru), paper:10.1007/s11669-007-9084-z:α(Zr)
tdb: tdb:RuZr-05Che-LB.tdb:HCP_A3, tdb:RuZr-07Idb.tdb:HCP_A3

TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

RuZr-05Che-LB.tdb: HCP_A3, type code %, sha256 5b8a10c1760f63f1…

36: PHASE HCP_A3 % 2 1 0.5 !
37: CONST HCP_A3 : RU ZR : VA : !

RuZr-07Idb.tdb: HCP_A3, type code %, sha256 7b022e6cd42b0237…

44: PHASE HCP_A3 % 2 1 0.5 !
45: CONST HCP_A3 : RU ZR : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-007-9084-z 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).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667814 H. Okamoto, The Ru-Zr system (ruthenium-zirconium), JPE 14, 225-227 (1993).
cited as the source of values for this phase

LIQUID (Ru–Zr)

Id: phase:ru-zr:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1494.38–4000 K, x(Zr) 0–1
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ru-zr:liquid
paper: paper:10.1007/s11669-007-9084-z:L, paper:10.1007/s11669-007-9084-z:liquid
tdb: tdb:RuZr-05Che-LB.tdb:LIQUID, tdb:RuZr-07Idb.tdb:LIQUID

TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written

RuZr-05Che-LB.tdb: LIQUID, type code %, sha256 5b8a10c1760f63f1…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : RU ZR : !

RuZr-07Idb.tdb: LIQUID, type code %, sha256 7b022e6cd42b0237…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : RU ZR : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-007-9084-z 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).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667814 H. Okamoto, The Ru-Zr system (ruthenium-zirconium), JPE 14, 225-227 (1993).
cited as the source of values for this phase

RU2ZR_C14 (Ru–Zr)

Id: phase:ru-zr:ru2zr-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Stoichiometry: Ru 0.6667, Zr 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 1558.48–2109.89 K, x(Zr) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ru-zr:ru2zr-c14
tdb: tdb:RuZr-05Che-LB.tdb:RU2ZR_C14

TDB models of RU2ZR_C14 (1): PHASE and CONSTITUENT statements as written

RuZr-05Che-LB.tdb: RU2ZR_C14, type code %, sha256 5b8a10c1760f63f1…

41: PHASE RU2ZR_C14 % 2 2 1 !
42: CONST RU2ZR_C14 : RU : ZR : !

RUZR_B2 (Ru–Zr)

Id: phase:ru-zr:ruzr-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in RuZr-07Idb.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 300–2401.63 K, x(Zr) 0.5–0.51181
Literature: 19 values (19 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ru-zr:ruzr-b2
paper: paper:10.1007/s11669-007-9084-z:RuZr
tdb: tdb:RuZr-05Che-LB.tdb:RUZR_B2, tdb:RuZr-07Idb.tdb:RUZR_B2

TDB models of RUZR_B2 (2): PHASE and CONSTITUENT statements as written

RuZr-05Che-LB.tdb: RUZR_B2, type code %, sha256 5b8a10c1760f63f1…

46: PHASE RUZR_B2 % 2 1 1 !
47: CONST RUZR_B2 : RU : ZR : !

RuZr-07Idb.tdb: RUZR_B2, type code %, sha256 7b022e6cd42b0237…

54: PHASE RUZR_B2 % 2 1 1 !
55: CONST RUZR_B2 : RU% ZR : RU ZR% : !

Example references (8 of 8; assessments first):

doi:10.1007/s11669-007-9084-z 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).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02667814 H. Okamoto, The Ru-Zr system (ruthenium-zirconium), JPE 14, 225-227 (1993).
cited as the source of values for this phase
doi:10.1016/s0966-9795(96)00069-6 K. Mahdouk, K. Elaissaoui, J. Charles, L. Bouirden, and J.-C. Gachon, Calorimetric Study and Optimization of the Ruthenium-Zirconium Phase Diagram, Intermetallics, 1997, 5, p 111-116
cited as the source of values for this phase
doi:10.1007/bf02628390 Letitia Topor, O. J. Kleppa, Thermochemistry of the intermetallic compounds RuTi, RuZr, and RuHf, Metall Trans A 19, 1061-1066 (1988).
cited as the source of values for this phase
doi:10.1016/0022-5088(89)90449-9 Letitia Topor, O.J. Kleppa, Enthalpies of formation of equiatomic compounds of titanium, zirconium and hafnium with late transition metals: Systematic aspects and comparisons with predicted values, Journal of the Less Common Metals 155, 61-73 (1989).
cited as the source of values for this phase
doi:10.1016/0364-5916(85)90032-x C. Colinet, A. Pasturel, P. Hicter, Calphad 9 (1985) 71–99.
cited as the source of values for this phase
doi:10.1016/s0036-9748(88)80148-0 R.E. Watson, M. Weinert, J.W. Davenport, G.W. Fernando, The energetics of transition metal alloy formation: Theory versus experiment, Scripta Metallurgica 22, 1285-1289 (1988).
cited as the source of values for this phase
doi:10.1016/s0925-8388(01)00956-2 Qiti Guo, Ole Jakob Kleppa, The standard enthalpies of formation of the compounds of early transition metals with late transition metals and with noble metals as determined by Kleppa and co-workers at the University of Chicago — A review, Journal of Alloys and Compounds 321, 169-182 (2001).
cited as the source of values for this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@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}
}