Ce–Ru phases

9 phases (tier A 6, tier C 2, liquid 1); 9 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 · Ce–Ru system page · Markdown · field reference

Phases of the Ce–Ru system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ce-ru:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1000.07–1071.99 K, x(Ru) 0–2e-05	0	1
CE16RU9 phase:ce-ru:ce16ru9	Ce16Ru9 · hR50 · R-3m (166)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–989.83 K, x(Ru) 0.36–0.36	22	1
CE3RU_D011 phase:ce-ru:ce3ru-d011	Fe3C · D0_11 · oP16 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–864.55 K, x(Ru) 0.25–0.25	0	1
CE4RU3 phase:ce-ru:ce4ru3	Ce4Ru3 · mC28 · C2/m (12)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1023.92 K, x(Ru) 0.42857–0.42857	25	1
CE7RU3_D102 phase:ce-ru:ce7ru3-d102	Fe3Th7 · D10_2 · hP20 · P6_3mc (186)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–961.08 K, x(Ru) 0.3–0.3	0	1
CERU2_C15 phase:ce-ru:ceru2-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1841.49 K, x(Ru) 0.66667–0.66667	0	1
FCC_A1 phase:ce-ru:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1000.07 K, x(Ru) 0–7e-05	0	1
HCP_A3 phase:ce-ru:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–3716.49 K, x(Ru) 0.98131–1	0	1
LIQUID phase:ce-ru:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 820.47–4000 K, x(Ru) 0–1	0	1

BCC_A2 (Ce–Ru)

Id: phase:ce-ru: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 1 of 1 calculated diagram(s): 1000.07–1071.99 K, x(Ru) 0–2e-05
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ce-ru:bcc-a2
tdb: tdb:CeRu-23Kar.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: BCC_A2, type code %B, sha256 fc3e64fb7e27ed53…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : CE% RU : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase

CE16RU9 (Ce–Ru)

Id: phase:ce-ru:ce16ru9; status assigned
Structure: Ce16Ru9 · hR50 · R-3m (166); type st:ce16ru9-hr50; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ce 0.6400, Ru 0.3600
Stability: stable in 1 of 1 calculated diagram(s): 300–989.83 K, x(Ru) 0.36–0.36
Literature: 22 values (22 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ce-ru:ce16ru9
paper: paper:10.1007/s11669-023-01043-1:Ce16Ru9
tdb: tdb:CeRu-23Kar.tdb:CE16RU9

TDB models of CE16RU9 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: CE16RU9, type code %, sha256 fc3e64fb7e27ed53…

56: PHASE CE16RU9 % 2 16 9 !
57: CONST CE16RU9 : CE : RU : !

Example references (4 of 4; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(98)00125-x N. Selhaoui, J. Charles, L. Bouirden, and J.C. Gachon, Optimization of the Binary Ce–Ru System, J. Alloys Compd., 1998, 269, p 166–172. https://doi.org/10.1016/S0925-8388(98)00125-X
cited as the source of values for this phase
doi:10.1016/j.cplett.2007.06.031 R.F. Zhang, S.H. Sheng, B.X. Liu, Predicting the formation enthalpies of binary intermetallic compounds, Chemical Physics Letters 442, 511-514 (2007).
cited as the source of values for this phase
doi:10.1038/npjcompumats.2015.10 Scott Kirklin, James E Saal, Bryce Meredig, Alex Thompson, Jeff W Doak, Muratahan Aykol et al., The Open Quantum Materials Database (OQMD): assessing the accuracy of DFT formation energies, npj Comput Mater 1 (2015).
cited as the source of values for this phase

CE3RU_D011 (Ce–Ru)

Id: phase:ce-ru:ce3ru-d011; status assigned
Structure: Fe3C · D0_11 · oP16 · Pnma (62); type st:d0-11-fe3c-op16; tier A: standard phase name; confidence high
Stoichiometry: Ce 0.7500, Ru 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–864.55 K, x(Ru) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ce-ru:ce3ru-d011
tdb: tdb:CeRu-23Kar.tdb:CE3RU_D011

TDB models of CE3RU_D011 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: CE3RU_D011, type code %, sha256 fc3e64fb7e27ed53…

46: PHASE CE3RU_D011 % 2 3 1 !
47: CONST CE3RU_D011 : CE : RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase

CE4RU3 (Ce–Ru)

Id: phase:ce-ru:ce4ru3; status assigned
Structure: Ce4Ru3 · mC28 · C2/m (12); type st:ce4ru3-mc28; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ce 0.5714, Ru 0.4286
Stability: stable in 1 of 1 calculated diagram(s): 300–1023.92 K, x(Ru) 0.42857–0.42857
Literature: 25 values (25 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ce-ru:ce4ru3
paper: paper:10.1007/s11669-023-01043-1:Ce4Ru3
tdb: tdb:CeRu-23Kar.tdb:CE4RU3

TDB models of CE4RU3 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: CE4RU3, type code %, sha256 fc3e64fb7e27ed53…

61: PHASE CE4RU3 % 2 4 3 !
62: CONST CE4RU3 : CE : RU : !

Example references (4 of 4; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(98)00125-x N. Selhaoui, J. Charles, L. Bouirden, and J.C. Gachon, Optimization of the Binary Ce–Ru System, J. Alloys Compd., 1998, 269, p 166–172. https://doi.org/10.1016/S0925-8388(98)00125-X
cited as the source of values for this phase
doi:10.1016/j.cplett.2007.06.031 R.F. Zhang, S.H. Sheng, B.X. Liu, Predicting the formation enthalpies of binary intermetallic compounds, Chemical Physics Letters 442, 511-514 (2007).
cited as the source of values for this phase
doi:10.1038/npjcompumats.2015.10 Scott Kirklin, James E Saal, Bryce Meredig, Alex Thompson, Jeff W Doak, Muratahan Aykol et al., The Open Quantum Materials Database (OQMD): assessing the accuracy of DFT formation energies, npj Comput Mater 1 (2015).
cited as the source of values for this phase

CE7RU3_D102 (Ce–Ru)

Id: phase:ce-ru:ce7ru3-d102; status assigned
Structure: Fe3Th7 · D10_2 · hP20 · P6_3mc (186); type st:d10-2-fe3th7-hp20; tier A: standard phase name; confidence high
Stoichiometry: Ce 0.7000, Ru 0.3000
Stability: stable in 1 of 1 calculated diagram(s): 300–961.08 K, x(Ru) 0.3–0.3
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ce-ru:ce7ru3-d102
tdb: tdb:CeRu-23Kar.tdb:CE7RU3_D102

TDB models of CE7RU3_D102 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: CE7RU3_D102, type code %, sha256 fc3e64fb7e27ed53…

51: PHASE CE7RU3_D102 % 2 7 3 !
52: CONST CE7RU3_D102 : CE : RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase

CERU2_C15 (Ce–Ru)

Id: phase:ce-ru:ceru2-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Stoichiometry: Ce 0.3333, Ru 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1841.49 K, x(Ru) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ce-ru:ceru2-c15
tdb: tdb:CeRu-23Kar.tdb:CERU2_C15

TDB models of CERU2_C15 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: CERU2_C15, type code %, sha256 fc3e64fb7e27ed53…

66: PHASE CERU2_C15 % 2 1 2 !
67: CONST CERU2_C15 : CE : RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase

FCC_A1 (Ce–Ru)

Id: phase:ce-ru:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1000.07 K, x(Ru) 0–7e-05
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ce-ru:fcc-a1
tdb: tdb:CeRu-23Kar.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: FCC_A1, type code %A, sha256 fc3e64fb7e27ed53…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : CE% RU : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase

HCP_A3 (Ce–Ru)

Id: phase:ce-ru: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 1 of 1 calculated diagram(s): 300–3716.49 K, x(Ru) 0.98131–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ce-ru:hcp-a3
tdb: tdb:CeRu-23Kar.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

CeRu-23Kar.tdb: HCP_A3, type code %A, sha256 fc3e64fb7e27ed53…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : CE RU% : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models this phase

LIQUID (Ce–Ru)

Id: phase:ce-ru:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 820.47–4000 K, x(Ru) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ce-ru:liquid
tdb: tdb:CeRu-23Kar.tdb:LIQUID

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

CeRu-23Kar.tdb: LIQUID, type code %, sha256 fc3e64fb7e27ed53…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : CE RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-023-01043-1 S. Kardellass, C. Corvalan-Moya, V. P. Vassiliev, Thermodynamic Modeling of the (Ce and Sm)-Ru Binary Systems Based on Linear, Exponential, and Combined Models Aided by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 300-323 (2023).
assessment that models 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}
}