Ga–Nb phases

12 phases (tier A 7, tier C 3, liquid 1, needs_review 1); 10 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 · Ga–Nb system page · Markdown · field reference

Phases of the Ga–Nb system (12)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
ORTHORHOMBIC_A11 phase:ga-nb:a11-orthorhombic	alpha-Ga · A11 · oC8 · Cmce (64)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–302.91 K, x(Nb) 0–0	0	1
BCC_A2 phase:ga-nb:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–3005 K, x(Nb) 0.84335–1	0	1
FCC_A1 phase:ga-nb:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
GA13NB5 phase:ga-nb:ga13nb5	Ga13Nb5 · oC36 · Cmmm (65)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1531.43 K, x(Nb) 0.27778–0.27778	4	1
GA3NB_D022 phase:ga-nb:ga3nb-d022	Al3Ti · D0_22 · tI8 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1393.64 K, x(Nb) 0.25–0.25	0	1
GA3NB5_D8M phase:ga-nb:ga3nb5-d8m	W5Si3 · D8_m · tI32 · I4/mcm (140)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2202.28 K, x(Nb) 0.625–0.625	0	1
GA4NB phase:ga-nb:ga4nb		needs_review	stable in 1 of 1 calculated diagram(s): 1446.2–1544.7 K, x(Nb) 0.2–0.2	2	1
GA4NB5 phase:ga-nb:ga4nb5	Ga4Ti5 · hP18 · P6_3/mcm (193)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1804.68 K, x(Nb) 0.55556–0.55556	2	1
GA5NB4 phase:ga-nb:ga5nb4	Ga5Nb4 · tP144 · P4_2/mnm (136)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1567.57 K, x(Nb) 0.44444–0.44444	4	1
GANB3_A15 phase:ga-nb:ganb3-a15	Cr3Si · A15 · cP8 · Pm-3n (223)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2126.41 K, x(Nb) 0.75094–0.80218	0	1
HCP_A3 phase:ga-nb:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
LIQUID phase:ga-nb:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 302.91–4000 K, x(Nb) 0–1	0	1

ORTHORHOMBIC_A11 (Ga–Nb)

Id: phase:ga-nb:a11-orthorhombic; status assigned
Structure: alpha-Ga · A11 · oC8 · Cmce (64); type st:a11-alpha-ga-oc8; tier A: standard phase name; confidence high
Stoichiometry: Ga 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–302.91 K, x(Nb) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-nb:a11-orthorhombic
tdb: tdb:GaNb-23Tam.tdb:ORTHORHOMBIC_A11

TDB models of ORTHORHOMBIC_A11 (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: ORTHORHOMBIC_A11, type code %, sha256 b16cd159aa8a4628…

43: PHASE ORTHORHOMBIC_A11 % 1 1 !
44: CONST ORTHORHOMBIC_A11 : GA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase

BCC_A2 (Ga–Nb)

Id: phase:ga-nb: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): 300–3005 K, x(Nb) 0.84335–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-nb:bcc-a2
tdb: tdb:GaNb-23Tam.tdb:BCC_A2

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

GaNb-23Tam.tdb: BCC_A2, type code %B, sha256 b16cd159aa8a4628…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : GA NB% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase

FCC_A1 (Ga–Nb)

Id: phase:ga-nb: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:ga-nb:fcc-a1
tdb: tdb:GaNb-23Tam.tdb:FCC_A1

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

GaNb-23Tam.tdb: FCC_A1, type code %A, sha256 b16cd159aa8a4628…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : GA NB : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase

GA13NB5 (Ga–Nb)

Id: phase:ga-nb:ga13nb5; status assigned
Structure: Ga13Nb5 · oC36 · Cmmm (65); type st:ga13nb5-oc36; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ga 0.7222, Nb 0.2778
Stability: stable in 1 of 1 calculated diagram(s): 300–1531.43 K, x(Nb) 0.27778–0.27778
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-nb:ga13nb5
paper: paper:10.1016/j.calphad.2023.102596:Ga13Nb5
tdb: tdb:GaNb-23Tam.tdb:GA13NB5

TDB models of GA13NB5 (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: GA13NB5, type code %, sha256 b16cd159aa8a4628…

58: PHASE GA13NB5 % 2 13 5 !
59: CONST GA13NB5 : GA : NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase; reports values for this phase

GA3NB_D022 (Ga–Nb)

Id: phase:ga-nb:ga3nb-d022; status assigned
Structure: Al3Ti · D0_22 · tI8 · I4/mmm (139); type st:d0-22-al3ti-ti8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaacxx and oqmd-30302, space group 139
Stoichiometry: Ga 0.7500, Nb 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–1393.64 K, x(Nb) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ga-nb:ga3nb-d022
mp: mp:mp-aaaaacxx
oqmd: oqmd:oqmd-30302
tdb: tdb:GaNb-23Tam.tdb:GA3NB_D022

TDB models of GA3NB_D022 (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: GA3NB_D022, type code %, sha256 b16cd159aa8a4628…

53: PHASE GA3NB_D022 % 2 3 1 !
54: CONST GA3NB_D022 : GA : NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase

GA3NB5_D8M (Ga–Nb)

Id: phase:ga-nb:ga3nb5-d8m; status assigned
Structure: W5Si3 · D8_m · tI32 · I4/mcm (140); type st:d8-m-w5si3-ti32; tier A: standard phase name; confidence high
Stoichiometry: Ga 0.3750, Nb 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 300–2202.28 K, x(Nb) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-nb:ga3nb5-d8m
tdb: tdb:GaNb-23Tam.tdb:GA3NB5_D8M

TDB models of GA3NB5_D8M (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: GA3NB5_D8M, type code %, sha256 b16cd159aa8a4628…

74: PHASE GA3NB5_D8M % 2 3 5 !
75: CONST GA3NB5_D8M : GA : NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase

GA4NB (Ga–Nb)

Id: phase:ga-nb:ga4nb; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Ga4Nb) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Ga4Nb) — Hallstedt 2025 mmc2 row for GA4NB: Ga4Nb
Stoichiometry: Ga 0.8000, Nb 0.2000
Stability: stable in 1 of 1 calculated diagram(s): 1446.2–1544.7 K, x(Nb) 0.2–0.2
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-nb:ga4nb
paper: paper:10.1016/j.calphad.2023.102596:ht_Ga4Nb
tdb: tdb:GaNb-23Tam.tdb:GA4NB

TDB models of GA4NB (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: GA4NB, type code %, sha256 b16cd159aa8a4628…

48: PHASE GA4NB % 2 4 1 !
49: CONST GA4NB : GA : NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase; reports values for this phase

GA4NB5 (Ga–Nb)

Id: phase:ga-nb:ga4nb5; status assigned
Structure: Ga4Ti5 · hP18 · P6_3/mcm (193); type st:ga4ti5-hp18; 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: Ga 0.4444, Nb 0.5556
Stability: stable in 1 of 1 calculated diagram(s): 300–1804.68 K, x(Nb) 0.55556–0.55556
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-nb:ga4nb5
paper: paper:10.1016/j.calphad.2023.102596:Ga4Nb5
tdb: tdb:GaNb-23Tam.tdb:GA4NB5

TDB models of GA4NB5 (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: GA4NB5, type code %, sha256 b16cd159aa8a4628…

68: PHASE GA4NB5 % 2 4 5 !
69: CONST GA4NB5 : GA : NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase; reports values for this phase

GA5NB4 (Ga–Nb)

Id: phase:ga-nb:ga5nb4; status assigned
Structure: Ga5Nb4 · tP144 · P4_2/mnm (136); type st:ga5nb4-tp144; 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: Ga 0.5556, Nb 0.4444
Stability: stable in 1 of 1 calculated diagram(s): 300–1567.57 K, x(Nb) 0.44444–0.44444
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ga-nb:ga5nb4
paper: paper:10.1016/j.calphad.2023.102596:Ga5Nb4
tdb: tdb:GaNb-23Tam.tdb:GA5NB4

TDB models of GA5NB4 (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: GA5NB4, type code %, sha256 b16cd159aa8a4628…

63: PHASE GA5NB4 % 2 5 4 !
64: CONST GA5NB4 : GA : NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase; reports values for this phase

GANB3_A15 (Ga–Nb)

Id: phase:ga-nb:ganb3-a15; status assigned
Structure: Cr3Si · A15 · cP8 · Pm-3n (223); type st:a15-cr3si-cp8; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–2126.41 K, x(Nb) 0.75094–0.80218
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-nb:ganb3-a15
tdb: tdb:GaNb-23Tam.tdb:GANB3_A15

TDB models of GANB3_A15 (1): PHASE and CONSTITUENT statements as written

GaNb-23Tam.tdb: GANB3_A15, type code %, sha256 b16cd159aa8a4628…

79: PHASE GANB3_A15 % 2 1 3 !
80: CONST GANB3_A15 : GA% NB : NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase

HCP_A3 (Ga–Nb)

Id: phase:ga-nb: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: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-nb:hcp-a3
tdb: tdb:GaNb-23Tam.tdb:HCP_A3

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

GaNb-23Tam.tdb: HCP_A3, type code %, sha256 b16cd159aa8a4628…

38: PHASE HCP_A3 % 2 1 0.5 !
39: CONST HCP_A3 : GA NB : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023).
assessment that models this phase

LIQUID (Ga–Nb)

Id: phase:ga-nb:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 302.91–4000 K, x(Nb) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-nb:liquid
tdb: tdb:GaNb-23Tam.tdb:LIQUID

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

GaNb-23Tam.tdb: LIQUID, type code %, sha256 b16cd159aa8a4628…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : GA NB : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2023.102596 Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (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}
}