Ag–Gd phases

7 phases (tier A 5, tier C 1, liquid 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 · Ag–Gd system page · Markdown · field reference

Phases of the Ag–Gd system (7)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AG2GD_C11B phase:ag-gd:ag2gd-c11b	MoSi2 · C11_b · tI6 · I4/mmm (139)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1104.66 K, x(Gd) 0.33333–0.33333	10	2
AG51GD14 phase:ag-gd:ag51gd14	Ag51Gd14 · hP68 · P6/m (175)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1245.13 K, x(Gd) 0.21538–0.21538	16	2
AGGD_B2 phase:ag-gd:aggd-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1395.91 K, x(Gd) 0.5–0.5	15	2
BCC_A2 phase:ag-gd:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1507.85–2499.83 K, x(Gd) 0.99849–1	3	2
FCC_A1 phase:ag-gd:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1239.85 K, x(Gd) 0–0.00856	9	2
HCP_A3 phase:ag-gd:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1582.85 K, x(Gd) 0.99713–1	5	2
LIQUID phase:ag-gd:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1052.14–2500 K, x(Gd) 0–1	37	2

AG2GD_C11B (Ag–Gd)

Id: phase:ag-gd:ag2gd-c11b; status assigned
Structure: MoSi2 · C11_b · tI6 · I4/mmm (139); type st:c11-b-mosi2-ti6; tier A: standard phase name; confidence high
Stoichiometry: Ag 0.6667, Gd 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–1104.66 K, x(Gd) 0.33333–0.33333
Literature: 10 values (10 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ag-gd:ag2gd-c11b
paper: paper:10.1016/j.jallcom.2007.11.049:Ag2Gd, paper:10.1016/j.jallcom.2008.09.129:Ag2Gd
tdb: tdb:AgGd-08Wan.tdb:AG2GD_C11B, tdb:AgGd-09Wan.tdb:AG2GD_C11B

TDB models of AG2GD_C11B (2): PHASE and CONSTITUENT statements as written

AgGd-08Wan.tdb: AG2GD_C11B, type code %, sha256 7fcc4d1b12e901c5…

48: PHASE AG2GD_C11B % 2 2 1 !
49: CONST AG2GD_C11B : AG : GD : !

AgGd-09Wan.tdb: AG2GD_C11B, type code %, sha256 80addf620c78d7fe…

51: PHASE AG2GD_C11B % 2 2 1 !
52: CONST AG2GD_C11B : AG : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2008.09.129 S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Gd and Ag–Nd systems, Journal of Alloys and Compounds 476, 245-252 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.11.049 H. Wang, L.G. Zhang, W.J. Zhu, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Ag–Gd binary system, Journal of Alloys and Compounds 466, 165-168 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(72)90049-5 Gonde Kiessler, Erich Gebhardt, Siegfried Steeb, Das system silber-gadolinium, Journal of the Less Common Metals 26, 293-298 (1972).
cited as the source of values for this phase
doi:10.1007/bf02869227 K. A. Gschneidner, F. W. Calderwood, The Ag−Gd (silver-gadolinium) system, Bulletin of Alloy Phase Diagrams 6, 138-140 (1985).
cited as the source of values for this phase

AG51GD14 (Ag–Gd)

Id: phase:ag-gd:ag51gd14; status assigned
Structure: Ag51Gd14 · hP68 · P6/m (175); type st:ag51gd14-hp68; 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: Ag 0.7846, Gd 0.2154
Stability: stable in 2 of 2 calculated diagram(s): 300–1245.13 K, x(Gd) 0.21538–0.21538
Literature: 16 values (16 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ag-gd:ag51gd14
paper: paper:10.1016/j.jallcom.2007.11.049:Ag51Gd14, paper:10.1016/j.jallcom.2008.09.129:Ag51Gd14
tdb: tdb:AgGd-08Wan.tdb:AG51GD14, tdb:AgGd-09Wan.tdb:AG51GD14

TDB models of AG51GD14 (2): PHASE and CONSTITUENT statements as written

AgGd-08Wan.tdb: AG51GD14, type code %, sha256 7fcc4d1b12e901c5…

43: PHASE AG51GD14 % 2 51 14 !
44: CONST AG51GD14 : AG : GD : !

AgGd-09Wan.tdb: AG51GD14, type code %, sha256 80addf620c78d7fe…

46: PHASE AG51GD14 % 2 51 14 !
47: CONST AG51GD14 : AG : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2008.09.129 S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Gd and Ag–Nd systems, Journal of Alloys and Compounds 476, 245-252 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.11.049 H. Wang, L.G. Zhang, W.J. Zhu, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Ag–Gd binary system, Journal of Alloys and Compounds 466, 165-168 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(72)90049-5 Gonde Kiessler, Erich Gebhardt, Siegfried Steeb, Das system silber-gadolinium, Journal of the Less Common Metals 26, 293-298 (1972).
cited as the source of values for this phase
doi:10.1007/bf02869227 K. A. Gschneidner, F. W. Calderwood, The Ag−Gd (silver-gadolinium) system, Bulletin of Alloy Phase Diagrams 6, 138-140 (1985).
cited as the source of values for this phase

AGGD_B2 (Ag–Gd)

Id: phase:ag-gd:aggd-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaabewyd and oqmd-10632, space group 221
Stoichiometry: Ag 0.5000, Gd 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 300–1395.91 K, x(Gd) 0.5–0.5
Literature: 15 values (15 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ag-gd:aggd-b2
mp: mp:mp-aaabewyd
oqmd: oqmd:oqmd-10632
paper: paper:10.1016/j.jallcom.2007.11.049:AgGd, paper:10.1016/j.jallcom.2008.09.129:AgGd
tdb: tdb:AgGd-08Wan.tdb:AGGD_B2, tdb:AgGd-09Wan.tdb:AGGD_B2

TDB models of AGGD_B2 (2): PHASE and CONSTITUENT statements as written

AgGd-08Wan.tdb: AGGD_B2, type code %, sha256 7fcc4d1b12e901c5…

53: PHASE AGGD_B2 % 2 1 1 !
54: CONST AGGD_B2 : AG : GD : !

AgGd-09Wan.tdb: AGGD_B2, type code %A, sha256 80addf620c78d7fe…

56: PHASE AGGD_B2 %A 2 1 1 !
57: CONST AGGD_B2 : AG : GD : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2008.09.129 S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Gd and Ag–Nd systems, Journal of Alloys and Compounds 476, 245-252 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.11.049 H. Wang, L.G. Zhang, W.J. Zhu, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Ag–Gd binary system, Journal of Alloys and Compounds 466, 165-168 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(72)90049-5 Gonde Kiessler, Erich Gebhardt, Siegfried Steeb, Das system silber-gadolinium, Journal of the Less Common Metals 26, 293-298 (1972).
cited as the source of values for this phase
doi:10.1007/bf02869227 K. A. Gschneidner, F. W. Calderwood, The Ag−Gd (silver-gadolinium) system, Bulletin of Alloy Phase Diagrams 6, 138-140 (1985).
cited as the source of values for this phase

BCC_A2 (Ag–Gd)

Id: phase:ag-gd: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 2 of 2 calculated diagram(s): 1507.85–2499.83 K, x(Gd) 0.99849–1
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-gd:bcc-a2
paper: paper:10.1016/j.jallcom.2008.09.129:βGd
tdb: tdb:AgGd-08Wan.tdb:BCC_A2, tdb:AgGd-09Wan.tdb:BCC_A2

TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

AgGd-08Wan.tdb: BCC_A2, type code %B, sha256 7fcc4d1b12e901c5…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : AG GD% : VA : !

AgGd-09Wan.tdb: BCC_A2, type code %B, sha256 80addf620c78d7fe…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : AG GD% : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2008.09.129 S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Gd and Ag–Nd systems, Journal of Alloys and Compounds 476, 245-252 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.11.049 H. Wang, L.G. Zhang, W.J. Zhu, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Ag–Gd binary system, Journal of Alloys and Compounds 466, 165-168 (2008).
assessment that models this phase
doi:10.1007/bf02869227 K. A. Gschneidner, F. W. Calderwood, The Ag−Gd (silver-gadolinium) system, Bulletin of Alloy Phase Diagrams 6, 138-140 (1985).
cited as the source of values for this phase
doi:10.1016/0022-5088(72)90049-5 Gonde Kiessler, Erich Gebhardt, Siegfried Steeb, Das system silber-gadolinium, Journal of the Less Common Metals 26, 293-298 (1972).
cited as the source of values for this phase

FCC_A1 (Ag–Gd)

Id: phase:ag-gd: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 2 of 2 calculated diagram(s): 300–1239.85 K, x(Gd) 0–0.00856
Literature: 9 values (9 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ag-gd:fcc-a1
paper: paper:10.1016/j.jallcom.2007.11.049:Fcc(Ag), paper:10.1016/j.jallcom.2008.09.129:(Ag)
tdb: tdb:AgGd-08Wan.tdb:FCC_A1, tdb:AgGd-09Wan.tdb:FCC_A1

TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

AgGd-08Wan.tdb: FCC_A1, type code %A, sha256 7fcc4d1b12e901c5…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : AG% GD : VA : !

AgGd-09Wan.tdb: FCC_A1, type code %A, sha256 80addf620c78d7fe…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : AG% GD : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2008.09.129 S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Gd and Ag–Nd systems, Journal of Alloys and Compounds 476, 245-252 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.11.049 H. Wang, L.G. Zhang, W.J. Zhu, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Ag–Gd binary system, Journal of Alloys and Compounds 466, 165-168 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(72)90049-5 Gonde Kiessler, Erich Gebhardt, Siegfried Steeb, Das system silber-gadolinium, Journal of the Less Common Metals 26, 293-298 (1972).
cited as the source of values for this phase
doi:10.1007/bf02869227 K. A. Gschneidner, F. W. Calderwood, The Ag−Gd (silver-gadolinium) system, Bulletin of Alloy Phase Diagrams 6, 138-140 (1985).
cited as the source of values for this phase

HCP_A3 (Ag–Gd)

Id: phase:ag-gd: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 2 of 2 calculated diagram(s): 300–1582.85 K, x(Gd) 0.99713–1
Literature: 5 values (5 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ag-gd:hcp-a3
paper: paper:10.1016/j.jallcom.2007.11.049:Gd, paper:10.1016/j.jallcom.2008.09.129:αGd
tdb: tdb:AgGd-08Wan.tdb:HCP_A3, tdb:AgGd-09Wan.tdb:HCP_A3

TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

AgGd-08Wan.tdb: HCP_A3, type code %A, sha256 7fcc4d1b12e901c5…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : AG GD% : VA : !

AgGd-09Wan.tdb: HCP_A3, type code %A, sha256 80addf620c78d7fe…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : AG GD% : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2008.09.129 S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Gd and Ag–Nd systems, Journal of Alloys and Compounds 476, 245-252 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.11.049 H. Wang, L.G. Zhang, W.J. Zhu, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Ag–Gd binary system, Journal of Alloys and Compounds 466, 165-168 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(72)90049-5 Gonde Kiessler, Erich Gebhardt, Siegfried Steeb, Das system silber-gadolinium, Journal of the Less Common Metals 26, 293-298 (1972).
cited as the source of values for this phase
doi:10.1007/bf02869227 K. A. Gschneidner, F. W. Calderwood, The Ag−Gd (silver-gadolinium) system, Bulletin of Alloy Phase Diagrams 6, 138-140 (1985).
cited as the source of values for this phase

LIQUID (Ag–Gd)

Id: phase:ag-gd:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1052.14–2500 K, x(Gd) 0–1
Literature: 37 values (37 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ag-gd:liquid
paper: paper:10.1016/j.jallcom.2007.11.049:L, paper:10.1016/j.jallcom.2008.09.129:L
tdb: tdb:AgGd-08Wan.tdb:LIQUID, tdb:AgGd-09Wan.tdb:LIQUID

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

AgGd-08Wan.tdb: LIQUID, type code %, sha256 7fcc4d1b12e901c5…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : AG GD : !

AgGd-09Wan.tdb: LIQUID, type code %, sha256 80addf620c78d7fe…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : AG GD : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2008.09.129 S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Gd and Ag–Nd systems, Journal of Alloys and Compounds 476, 245-252 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2007.11.049 H. Wang, L.G. Zhang, W.J. Zhu, H.S. Liu, Z.P. Jin, Thermodynamic assessment of the Ag–Gd binary system, Journal of Alloys and Compounds 466, 165-168 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(72)90049-5 Gonde Kiessler, Erich Gebhardt, Siegfried Steeb, Das system silber-gadolinium, Journal of the Less Common Metals 26, 293-298 (1972).
cited as the source of values for this phase
doi:10.1007/bf02869227 K. A. Gschneidner, F. W. Calderwood, The Ag−Gd (silver-gadolinium) system, Bulletin of Alloy Phase Diagrams 6, 138-140 (1985).
cited as the source of 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}
}