Ga–Pd phases

10 phases (tier A 6, tier B 1, tier C 1, 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 · Ga–Pd system page · Markdown · field reference

Phases of the Ga–Pd system (10)
Phase	Structure	Basis	Stability (calculated)	TDB models
ORTHORHOMBIC_A11 phase:ga-pd:a11-orthorhombic	alpha-Ga · A11 · oC8 · Cmce (64)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 297.43–302.91 K, x(Pd) 0–0	1
BCC_A2 phase:ga-pd:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
FCC_A1 phase:ga-pd:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2499.24 K, x(Pd) 0.91085–1	1
GA3PD5 phase:ga-pd:ga3pd5	Ge3Rh5 · oP16 · Pbam (55)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1324.01 K, x(Pd) 0.625–0.625	1
GA5PD phase:ga-pd:ga5pd	Ga5Pd · tI24 · I4/mcm (140)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–454.06 K, x(Pd) 0.16667–0.16667	1
GA7PD3 phase:ga-pd:ga7pd3		needs_review	stable in 1 of 1 calculated diagram(s): 300–702.1 K, x(Pd) 0.3–0.3	1
GAPD_B20 phase:ga-pd:gapd-b20	FeSi · B20 · cP8 · P2_13 (198)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1302.98 K, x(Pd) 0.5–0.5	1
GAPD2_C37 phase:ga-pd:gapd2-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1539.73 K, x(Pd) 0.66667–0.74419	1
HCP_A3 phase:ga-pd:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
LIQUID phase:ga-pd:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 297.43–2500 K, x(Pd) 0–1	1

ORTHORHOMBIC_A11 (Ga–Pd)

Id: phase:ga-pd: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): 297.43–302.91 K, x(Pd) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-pd:a11-orthorhombic
tdb: tdb:GaPd-99Gro.tdb:ORTHORHOMBIC_A11

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

GaPd-99Gro.tdb: ORTHORHOMBIC_A11, type code %, sha256 1d2b39ec052d1b19…

47: PHASE ORTHORHOMBIC_A11 % 1 1 !
48: CONST ORTHORHOMBIC_A11 : GA : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

BCC_A2 (Ga–Pd)

Id: phase:ga-pd:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; 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-pd:bcc-a2
tdb: tdb:GaPd-99Gro.tdb:BCC_A2

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

GaPd-99Gro.tdb: BCC_A2, type code %B, sha256 1d2b39ec052d1b19…

37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : GA PD : VA : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

FCC_A1 (Ga–Pd)

Id: phase:ga-pd: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): 300–2499.24 K, x(Pd) 0.91085–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-pd:fcc-a1
tdb: tdb:GaPd-99Gro.tdb:FCC_A1

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

GaPd-99Gro.tdb: FCC_A1, type code %A, sha256 1d2b39ec052d1b19…

32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : GA PD% : VA : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

GA3PD5 (Ga–Pd)

Id: phase:ga-pd:ga3pd5; status assigned
Structure: Ge3Rh5 · oP16 · Pbam (55); type st:ge3rh5-op16; 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 0.3750, Pd 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 300–1324.01 K, x(Pd) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-pd:ga3pd5
tdb: tdb:GaPd-99Gro.tdb:GA3PD5

TDB models of GA3PD5 (1): PHASE and CONSTITUENT statements as written

GaPd-99Gro.tdb: GA3PD5, type code %, sha256 1d2b39ec052d1b19…

67: PHASE GA3PD5 % 2 3 5 !
68: CONST GA3PD5 : GA : PD : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

GA5PD (Ga–Pd)

Id: phase:ga-pd:ga5pd; status assigned
Structure: Ga5Pd · tI24 · I4/mcm (140); type st:ga5pd-ti24; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Ga 0.8333, Pd 0.1667
Stability: stable in 1 of 1 calculated diagram(s): 300–454.06 K, x(Pd) 0.16667–0.16667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ga-pd:ga5pd
mp: mp:mp-aaaabtjg
oqmd: oqmd:oqmd-17279
tdb: tdb:GaPd-99Gro.tdb:GA5PD

TDB models of GA5PD (1): PHASE and CONSTITUENT statements as written

GaPd-99Gro.tdb: GA5PD, type code %, sha256 1d2b39ec052d1b19…

52: PHASE GA5PD % 2 5 1 !
53: CONST GA5PD : GA : PD : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

GA7PD3 (Ga–Pd)

Id: phase:ga-pd:ga7pd3; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:sgte_mmc2_row_disagrees_with_dft; no_structure_token; sgte_mmc2_row_disagrees_with_dft
Candidate (dft_mp): Im-3m (229) — on-hull MP Ga7Pd3 at x(PD)=0.3000
Candidate (dft_oqmd): Im-3m (229) — on-hull OQMD Ga7 Pd3 at x(PD)=0.3000
Candidate (sgte_mmc2): Ga7Pd3 · mC20 · C2/m (12) — Hallstedt 2025 mmc2 row for GA7PD3: Ga7Pd3
Candidate (tdb_comment): Ga7Pd3 · mC20 · C2/m — GaPd-99Gro.tdb: 'Prototype Ga7Pd3 (mC20, C2/m)'
Stoichiometry: Ga 0.7000, Pd 0.3000
Stability: stable in 1 of 1 calculated diagram(s): 300–702.1 K, x(Pd) 0.3–0.3
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-pd:ga7pd3
tdb: tdb:GaPd-99Gro.tdb:GA7PD3

TDB models of GA7PD3 (1): PHASE and CONSTITUENT statements as written

GaPd-99Gro.tdb: GA7PD3, type code %, sha256 1d2b39ec052d1b19…

57: PHASE GA7PD3 % 2 7 3 !
58: CONST GA7PD3 : GA : PD : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

GAPD_B20 (Ga–Pd)

Id: phase:ga-pd:gapd-b20; status assigned
Structure: FeSi · B20 · cP8 · P2_13 (198); type st:b20-fesi-cp8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacjjlu and oqmd-23801, space group 198
Stoichiometry: Ga 0.5000, Pd 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1302.98 K, x(Pd) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ga-pd:gapd-b20
mp: mp:mp-aaacjjlu
oqmd: oqmd:oqmd-23801
tdb: tdb:GaPd-99Gro.tdb:GAPD_B20

TDB models of GAPD_B20 (1): PHASE and CONSTITUENT statements as written

GaPd-99Gro.tdb: GAPD_B20, type code %, sha256 1d2b39ec052d1b19…

62: PHASE GAPD_B20 % 2 1 1 !
63: CONST GAPD_B20 : GA : PD : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

GAPD2_C37 (Ga–Pd)

Id: phase:ga-pd:gapd2-c37; status assigned
Structure: Co2Si · C37 · oP12 · Pnma (62); type st:c37-co2si-op12; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1539.73 K, x(Pd) 0.66667–0.74419
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-pd:gapd2-c37
tdb: tdb:GaPd-99Gro.tdb:GAPD2_C37

TDB models of GAPD2_C37 (1): PHASE and CONSTITUENT statements as written

GaPd-99Gro.tdb: GAPD2_C37, type code %, sha256 1d2b39ec052d1b19…

72: PHASE GAPD2_C37 % 2 1 2 !
73: CONST GAPD2_C37 : GA% PD : PD : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

HCP_A3 (Ga–Pd)

Id: phase:ga-pd: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-pd:hcp-a3
tdb: tdb:GaPd-99Gro.tdb:HCP_A3

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

GaPd-99Gro.tdb: HCP_A3, type code %A, sha256 1d2b39ec052d1b19…

42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : GA PD : VA : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
assessment that models this phase

LIQUID (Ga–Pd)

Id: phase:ga-pd:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 297.43–2500 K, x(Pd) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ga-pd:liquid
tdb: tdb:GaPd-99Gro.tdb:LIQUID

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

GaPd-99Gro.tdb: LIQUID, type code %, sha256 1d2b39ec052d1b19…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : GA PD : !

Example references (1 of 1; assessments first):

doi:10.1361/105497199770340608 J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999).
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}
}