Ru–Sm phases

9 phases (tier A 5, tier C 2, liquid 1, needs_review 1); 8 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–Sm system page · Markdown · field reference

Phases of the Ru–Sm system (9)
Phase	Structure	Basis	Stability (calculated)	TDB models
BCC_A2 phase:ru-sm:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1192.01–1345 K, x(Sm) 0.99999–1	1
FCC_A1 phase:ru-sm:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
HCP_A3 phase:ru-sm:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2627.36 K, x(Sm) 0–1	1
LIQUID phase:ru-sm:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1048.98–4000 K, x(Sm) 0–1	1
RHOMB_C19 phase:ru-sm:rhomb-c19	CdCl2 · C19 · hR3 · R-3m (166)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1191.87 K, x(Sm) 1–1	1
RU25SM44 phase:ru-sm:ru25sm44	Ru25Y44 · oP276 · Pnna (52)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1210.37 K, x(Sm) 0.63768–0.63768	1
RU2SM_C15 phase:ru-sm:ru2sm-c15		needs_review	stable in 1 of 1 calculated diagram(s): 300–2171.2 K, x(Sm) 0.33333–0.33333	1
RU2SM5 phase:ru-sm:ru2sm5	Mn5C2 · mC28 · C2/c (15)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1228.98 K, x(Sm) 0.71429–0.71429	1
RUSM3_D011 phase:ru-sm:rusm3-d011	Fe3C · D0_11 · oP16 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1194.35 K, x(Sm) 0.75–0.75	1

BCC_A2 (Ru–Sm)

Id: phase:ru-sm: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): 1192.01–1345 K, x(Sm) 0.99999–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

RuSm-23Kar.tdb: BCC_A2, type code %B, sha256 a4c9d51d324b0c37…

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

FCC_A1 (Ru–Sm)

Id: phase:ru-sm:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Ru 1.0000
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

RuSm-23Kar.tdb: FCC_A1, type code %A, sha256 a4c9d51d324b0c37…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : 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 (Ru–Sm)

Id: phase:ru-sm: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): 300–2627.36 K, x(Sm) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

RuSm-23Kar.tdb: HCP_A3, type code %A, sha256 a4c9d51d324b0c37…

44: PHASE HCP_A3 %A 2 1 0.5 !
45: CONST HCP_A3 : RU% SM% : 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 (Ru–Sm)

Id: phase:ru-sm:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1048.98–4000 K, x(Sm) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ru-sm:liquid
tdb: tdb:RuSm-23Kar.tdb:LIQUID

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

RuSm-23Kar.tdb: LIQUID, type code %, sha256 a4c9d51d324b0c37…

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

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

RHOMB_C19 (Ru–Sm)

Id: phase:ru-sm:rhomb-c19; status assigned
Structure: CdCl2 · C19 · hR3 · R-3m (166); type st:c19-cdcl2-hr3; tier A: standard phase name; confidence high
Stoichiometry: Sm 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–1191.87 K, x(Sm) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ru-sm:rhomb-c19
tdb: tdb:RuSm-23Kar.tdb:RHOMB_C19

TDB models of RHOMB_C19 (1): PHASE and CONSTITUENT statements as written

RuSm-23Kar.tdb: RHOMB_C19, type code %, sha256 a4c9d51d324b0c37…

49: PHASE RHOMB_C19 % 1 1 !
50: CONST RHOMB_C19 : SM : !

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

RU25SM44 (Ru–Sm)

Id: phase:ru-sm:ru25sm44; status assigned
Structure: Ru25Y44 · oP276 · Pnna (52); type st:ru25y44-op276; 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_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ru 0.3623, Sm 0.6377
Stability: stable in 1 of 1 calculated diagram(s): 300–1210.37 K, x(Sm) 0.63768–0.63768
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ru-sm:ru25sm44
tdb: tdb:RuSm-23Kar.tdb:RU25SM44

TDB models of RU25SM44 (1): PHASE and CONSTITUENT statements as written

RuSm-23Kar.tdb: RU25SM44, type code %, sha256 a4c9d51d324b0c37…

59: PHASE RU25SM44 % 2 25 44 !
60: CONST RU25SM44 : RU : SM : !

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

RU2SM_C15 (Ru–Sm)

Id: phase:ru-sm:ru2sm-c15; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:name_suggests_C15_but_dft_space_group_194; name_suggests_C15_but_dft_space_group_194
Candidate (dft_mp): P6_3/mmc (194) — on-hull MP SmRu2 at x(SM)=0.3333
Candidate (dft_oqmd): P63/mmc (194) — on-hull OQMD Ru2 Sm1 at x(SM)=0.3333
Candidate (name_token): Cu2Mg · C15 · cF24 · Fd-3m (227) — Strukturbericht/word 'C15' in the TDB name
Candidate (sgte_mmc2): Cu2Mg · C15 · cF24 · Fd-3m (227) — Hallstedt 2025 mmc2 row for RU2SM_C15: Ru2Sm
Candidate (tdb_comment): Cu2Mg · cF24 · Fd-3m — RuSm-23Kar.tdb: 'Prototype Cu2Mg (cF24, Fd-3m)'
Stoichiometry: Ru 0.6667, Sm 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–2171.2 K, x(Sm) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ru-sm:ru2sm-c15
tdb: tdb:RuSm-23Kar.tdb:RU2SM_C15

TDB models of RU2SM_C15 (1): PHASE and CONSTITUENT statements as written

RuSm-23Kar.tdb: RU2SM_C15, type code %, sha256 a4c9d51d324b0c37…

54: PHASE RU2SM_C15 % 2 2 1 !
55: CONST RU2SM_C15 : RU : SM : !

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

RU2SM5 (Ru–Sm)

Id: phase:ru-sm:ru2sm5; status assigned
Structure: Mn5C2 · mC28 · C2/c (15); type st:mn5c2-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 (dft_space_group_15_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ru 0.2857, Sm 0.7143
Stability: stable in 1 of 1 calculated diagram(s): 300–1228.98 K, x(Sm) 0.71429–0.71429
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ru-sm:ru2sm5
tdb: tdb:RuSm-23Kar.tdb:RU2SM5

TDB models of RU2SM5 (1): PHASE and CONSTITUENT statements as written

RuSm-23Kar.tdb: RU2SM5, type code %, sha256 a4c9d51d324b0c37…

64: PHASE RU2SM5 % 2 2 5 !
65: CONST RU2SM5 : RU : SM : !

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

RUSM3_D011 (Ru–Sm)

Id: phase:ru-sm:rusm3-d011; status assigned
Structure: Fe3C · D0_11 · oP16 · Pnma (62); type st:d0-11-fe3c-op16; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacpppd and oqmd-1437305, space group 62
Stoichiometry: Ru 0.2500, Sm 0.7500
Stability: stable in 1 of 1 calculated diagram(s): 300–1194.35 K, x(Sm) 0.75–0.75
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ru-sm:rusm3-d011
mp: mp:mp-aaacpppd
oqmd: oqmd:oqmd-1437305
tdb: tdb:RuSm-23Kar.tdb:RUSM3_D011

TDB models of RUSM3_D011 (1): PHASE and CONSTITUENT statements as written

RuSm-23Kar.tdb: RUSM3_D011, type code %, sha256 a4c9d51d324b0c37…

69: PHASE RUSM3_D011 % 2 1 3 !
70: CONST RUSM3_D011 : RU : SM : !

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}
}