Mo–Ru phases

7 phases (tier A 5, liquid 1, needs_review 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 · Mo–Ru system page · Markdown · field reference

Phases of the Mo–Ru system (7)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
SIGMA_ALT phase:mo-ru:alt-sigma		needs_review	stable in 1 of 1 calculated diagram(s): 1415.99–2180 K, x(Ru) 0.37–0.38	0	1
BCC_A2 phase:mo-ru:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2907.01 K, x(Ru) 0–0.32265	9	3
SIGMA_D8B phase:mo-ru:d8b-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1414.24–2189.52 K, x(Ru) 0.37303–0.39078	0	2
FCC_A1 phase:mo-ru:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
HCP_A3 phase:mo-ru:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2607 K, x(Ru) 0.48792–1	9	3
LIQUID phase:mo-ru:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 2227.98–4000 K, x(Ru) 0–1	3	3
SIGMA_OLD phase:mo-ru:old-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1414.45–2189.54 K, x(Ru) 0.36817–0.38292	6	1

SIGMA_ALT (Mo–Ru)

Id: phase:mo-ru:alt-sigma; status needs_review
No structure assigned. Why: unrecognised_name_tokens:ALT
Candidate (name_token): sigma-CrFe · D8_b · tP30 · P4_2/mnm (136) — Strukturbericht/word 'D8B' in the TDB name
Candidate (tdb_comment): CrFe · tP30 · P4_2/mnm — MoRu-21Liu.tdb: 'Prototype CrFe (tP30, P4_2/mnm), alternative sigma model'
Stability: stable in 1 of 1 calculated diagram(s): 1415.99–2180 K, x(Ru) 0.37–0.38
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mo-ru:alt-sigma
tdb: tdb:MoRu-21Liu.tdb:SIGMA_ALT

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

MoRu-21Liu.tdb: SIGMA_ALT, type code %, sha256 ca6f85caeed3576c…

49: PHASE SIGMA_ALT % 2 10 20 !
50: CONST SIGMA_ALT : MO RU : MO RU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.102239 J. Liu, C. Zhou, H. Wang, Calphad, 72, 102239(2021).
assessment that models this phase

BCC_A2 (Mo–Ru)

Id: phase:mo-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 3 of 3 calculated diagram(s): 300–2907.01 K, x(Ru) 0–0.32265
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:mo-ru:bcc-a2
paper: paper:10.1016/s0925-8388(00)01192-0:bcc
tdb: tdb:MoRu-00Oh-oldsigma.tdb:BCC_A2, tdb:MoRu-00Oh.tdb:BCC_A2, tdb:MoRu-21Liu.tdb:BCC_A2

TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written

MoRu-00Oh-oldsigma.tdb: BCC_A2, type code %B, sha256 90b4291aface7903…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : MO% RU : VA : !

MoRu-00Oh.tdb: BCC_A2, type code %B, sha256 7638f7116eda1f73…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : MO% RU : VA : !

MoRu-21Liu.tdb: BCC_A2, type code %B, sha256 ca6f85caeed3576c…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : MO% RU : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(00)01192-0 C.-S. Oh, H. Murakami, H. Harada, J. Alloys Compd., 313, 115-20(2000).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.102239 J. Liu, C. Zhou, H. Wang, Calphad, 72, 102239(2021).
assessment that models this phase

SIGMA_D8B (Mo–Ru)

Id: phase:mo-ru:d8b-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in MoRu-21Liu.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 1414.24–2189.52 K, x(Ru) 0.37303–0.39078
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:mo-ru:d8b-sigma
tdb: tdb:MoRu-00Oh.tdb:SIGMA_D8B, tdb:MoRu-21Liu.tdb:SIGMA_D8B

TDB models of SIGMA_D8B (2): PHASE and CONSTITUENT statements as written

MoRu-00Oh.tdb: SIGMA_D8B, type code %, sha256 7638f7116eda1f73…

44: PHASE SIGMA_D8B % 3 10 4 16 !
45: CONST SIGMA_D8B : RU : MO : MO RU : !

MoRu-21Liu.tdb: SIGMA_D8B, type code %, sha256 ca6f85caeed3576c…

44: PHASE SIGMA_D8B % 3 10 4 16 !
45: CONST SIGMA_D8B : MO RU : MO RU : MO RU : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2020.102239 J. Liu, C. Zhou, H. Wang, Calphad, 72, 102239(2021).
assessment that models this phase
doi:10.1016/S0925-8388(00)01192-0 C.-S. Oh, H. Murakami, H. Harada, J. Alloys Compd., 313, 115-20(2000).
assessment that models this phase

FCC_A1 (Mo–Ru)

Id: phase:mo-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: not stable in 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mo-ru:fcc-a1
tdb: tdb:MoRu-00Oh-oldsigma.tdb:FCC_A1, tdb:MoRu-00Oh.tdb:FCC_A1, tdb:MoRu-21Liu.tdb:FCC_A1

TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written

MoRu-00Oh-oldsigma.tdb: FCC_A1, type code %A, sha256 90b4291aface7903…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : MO RU : VA : !

MoRu-00Oh.tdb: FCC_A1, type code %A, sha256 7638f7116eda1f73…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : MO RU : VA : !

MoRu-21Liu.tdb: FCC_A1, type code %A, sha256 ca6f85caeed3576c…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : MO RU : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2020.102239 J. Liu, C. Zhou, H. Wang, Calphad, 72, 102239(2021).
assessment that models this phase
doi:10.1016/S0925-8388(00)01192-0 C.-S. Oh, H. Murakami, H. Harada, J. Alloys Compd., 313, 115-20(2000).
assessment that models this phase

HCP_A3 (Mo–Ru)

Id: phase:mo-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 3 of 3 calculated diagram(s): 300–2607 K, x(Ru) 0.48792–1
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:mo-ru:hcp-a3
paper: paper:10.1016/s0925-8388(00)01192-0:hcp
tdb: tdb:MoRu-00Oh-oldsigma.tdb:HCP_A3, tdb:MoRu-00Oh.tdb:HCP_A3, tdb:MoRu-21Liu.tdb:HCP_A3

TDB models of HCP_A3 (3): PHASE and CONSTITUENT statements as written

MoRu-00Oh-oldsigma.tdb: HCP_A3, type code %A, sha256 90b4291aface7903…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : MO RU% : VA : !

MoRu-00Oh.tdb: HCP_A3, type code %A, sha256 7638f7116eda1f73…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : MO RU% : VA : !

MoRu-21Liu.tdb: HCP_A3, type code %A, sha256 ca6f85caeed3576c…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : MO RU% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(00)01192-0 C.-S. Oh, H. Murakami, H. Harada, J. Alloys Compd., 313, 115-20(2000).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.102239 J. Liu, C. Zhou, H. Wang, Calphad, 72, 102239(2021).
assessment that models this phase

LIQUID (Mo–Ru)

Id: phase:mo-ru:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 2227.98–4000 K, x(Ru) 0–1
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:mo-ru:liquid
paper: paper:10.1016/s0925-8388(00)01192-0:L
tdb: tdb:MoRu-00Oh-oldsigma.tdb:LIQUID, tdb:MoRu-00Oh.tdb:LIQUID, tdb:MoRu-21Liu.tdb:LIQUID

TDB models of LIQUID (3): PHASE and CONSTITUENT statements as written

MoRu-00Oh-oldsigma.tdb: LIQUID, type code %, sha256 90b4291aface7903…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : MO RU : !

MoRu-00Oh.tdb: LIQUID, type code %, sha256 7638f7116eda1f73…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : MO RU : !

MoRu-21Liu.tdb: LIQUID, type code %, sha256 ca6f85caeed3576c…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : MO RU : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(00)01192-0 C.-S. Oh, H. Murakami, H. Harada, J. Alloys Compd., 313, 115-20(2000).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.102239 J. Liu, C. Zhou, H. Wang, Calphad, 72, 102239(2021).
assessment that models this phase

SIGMA_OLD (Mo–Ru)

Id: phase:mo-ru:old-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1414.45–2189.54 K, x(Ru) 0.36817–0.38292
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:mo-ru:old-sigma, corpus:phase:mo-ru:sigma-old
paper: paper:10.1016/s0925-8388(00)01192-0:σ
tdb: tdb:MoRu-00Oh-oldsigma.tdb:SIGMA_OLD

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

MoRu-00Oh-oldsigma.tdb: SIGMA_OLD, type code %, sha256 90b4291aface7903…

45: PHASE SIGMA_OLD % 3 8 4 18 !
46: CONST SIGMA_OLD : RU : MO : MO RU : !

Example references (1 of 1; assessments first):

doi:10.1016/S0925-8388(00)01192-0 C.-S. Oh, H. Murakami, H. Harada, J. Alloys Compd., 313, 115-20(2000).
assessment that models this phase; reports 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}
}