Gd–Ru phases

8 phases (tier A 5, tier C 1, liquid 1, needs_review 1); 7 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 · Gd–Ru system page · Markdown · field reference

Phases of the Gd–Ru system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:gd-ru:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1508.03–1593.03 K, x(Ru) 0–6e-05	0	1
FCC_A1 phase:gd-ru:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
GD2RU phase:gd-ru:gd2ru		needs_review	stable in 1 of 1 calculated diagram(s): 300–1273.31 K, x(Ru) 0.33333–0.33333	1	1
GD3RU_D011 phase:gd-ru:gd3ru-d011	Fe3C · D0_11 · oP16 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1264.17 K, x(Ru) 0.25–0.25	0	1
GD73RU27 phase:gd-ru:gd73ru27	Mn5C2 · mC28 · C2/c (15)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1283.63 K, x(Ru) 0.27–0.27	1	1
GDRU2_C14 phase:gd-ru:gdru2-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2128.47 K, x(Ru) 0.66667–0.66667	0	1
HCP_A3 phase:gd-ru:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–3999.33 K, x(Ru) 0–1	0	1
LIQUID phase:gd-ru:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1124.72–4000 K, x(Ru) 0–1	0	1

BCC_A2 (Gd–Ru)

Id: phase:gd-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): 1508.03–1593.03 K, x(Ru) 0–6e-05
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

GdRu-23Kar.tdb: BCC_A2, type code %B, sha256 b82e45001d6e5254…

44: PHASE BCC_A2 %B 2 1 3 !
45: CONST BCC_A2 : GD% RU : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (2023).
assessment that models this phase

FCC_A1 (Gd–Ru)

Id: phase:gd-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 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

GdRu-23Kar.tdb: FCC_A1, type code %A, sha256 b82e45001d6e5254…

39: PHASE FCC_A1 %A 2 1 1 !
40: CONST FCC_A1 : GD RU : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (2023).
assessment that models this phase

GD2RU (Gd–Ru)

Id: phase:gd-ru:gd2ru; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (Gd2Ru) — Hallstedt 2025 mmc2 row for GD2RU: Gd2Ru (existence questionable)
Stoichiometry: Gd 0.6667, Ru 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1273.31 K, x(Ru) 0.33333–0.33333
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ru:gd2ru
paper: paper:10.1007/s11669-022-01023-x:Gd2Ru
tdb: tdb:GdRu-23Kar.tdb:GD2RU

TDB models of GD2RU (1): PHASE and CONSTITUENT statements as written

GdRu-23Kar.tdb: GD2RU, type code %, sha256 b82e45001d6e5254…

64: PHASE GD2RU % 2 2 1 !
65: CONST GD2RU : GD : RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (2023).
assessment that models this phase; reports values for this phase

GD3RU_D011 (Gd–Ru)

Id: phase:gd-ru:gd3ru-d011; status assigned
Structure: Fe3C · D0_11 · oP16 · Pnma (62); type st:d0-11-fe3c-op16; tier A: standard phase name; confidence high
Stoichiometry: Gd 0.7500, Ru 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–1264.17 K, x(Ru) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:gd-ru:gd3ru-d011
tdb: tdb:GdRu-23Kar.tdb:GD3RU_D011

TDB models of GD3RU_D011 (1): PHASE and CONSTITUENT statements as written

GdRu-23Kar.tdb: GD3RU_D011, type code %, sha256 b82e45001d6e5254…

54: PHASE GD3RU_D011 % 2 3 1 !
55: CONST GD3RU_D011 : GD : RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (2023).
assessment that models this phase

GD73RU27 (Gd–Ru)

Id: phase:gd-ru:gd73ru27; 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 (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Gd 0.7300, Ru 0.2700
Stability: stable in 1 of 1 calculated diagram(s): 300–1283.63 K, x(Ru) 0.27–0.27
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:gd-ru:gd73ru27
paper: paper:10.1007/s11669-022-01023-x:Gd73Ru27
tdb: tdb:GdRu-23Kar.tdb:GD73RU27

TDB models of GD73RU27 (1): PHASE and CONSTITUENT statements as written

GdRu-23Kar.tdb: GD73RU27, type code %, sha256 b82e45001d6e5254…

59: PHASE GD73RU27 % 2 0.73 0.27 !
60: CONST GD73RU27 : GD : RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (2023).
assessment that models this phase; reports values for this phase

GDRU2_C14 (Gd–Ru)

Id: phase:gd-ru:gdru2-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Stoichiometry: Gd 0.3333, Ru 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–2128.47 K, x(Ru) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:gd-ru:gdru2-c14
tdb: tdb:GdRu-23Kar.tdb:GDRU2_C14

TDB models of GDRU2_C14 (1): PHASE and CONSTITUENT statements as written

GdRu-23Kar.tdb: GDRU2_C14, type code %, sha256 b82e45001d6e5254…

69: PHASE GDRU2_C14 % 2 1 2 !
70: CONST GDRU2_C14 : GD : RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (2023).
assessment that models this phase

HCP_A3 (Gd–Ru)

Id: phase:gd-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): 300–3999.33 K, x(Ru) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

GdRu-23Kar.tdb: HCP_A3, type code %A, sha256 b82e45001d6e5254…

49: PHASE HCP_A3 %A 2 1 0.5 !
50: CONST HCP_A3 : GD% RU% : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (2023).
assessment that models this phase

LIQUID (Gd–Ru)

Id: phase:gd-ru:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1124.72–4000 K, x(Ru) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:gd-ru:liquid
tdb: tdb:GdRu-23Kar.tdb:LIQUID

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

GdRu-23Kar.tdb: LIQUID, type code %, sha256 b82e45001d6e5254…

34: PHASE LIQUID:L % 1 1 !
35: CONST LIQUID:L : GD RU : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-022-01023-x S. Kardellass, V. P. Vassiliev, K. Mahdouk, N. Laaroussi, N. Selhaoui, Excess Thermodynamic Properties of Solutions in Ln-Ru (Ln = Nd, Gd, Dy) Binary Systems Based on Quadratic, Exponential and Combined Models Supported by Ab-Initio Calculations, J. Phase Equilib. Diffus. 44, 43-75 (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}
}