Ag–Al phases

5 phases (tier A 4, liquid 1); 5 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–Al system page · Markdown · field reference

Phases of the Ag–Al system (5)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ag-al:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 859.31–2500 K, x(Al) 0.20553–1	20	5
CUB_A13 phase:ag-al:cub-a13	beta-Mn · A13 · cP20 · P4_132 (213)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–740.16 K, x(Al) 0.16245–0.31021	6	5
FCC_A1 phase:ag-al:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–2499.72 K, x(Al) 0–1	25	5
HCP_A3 phase:ag-al:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–1007.61 K, x(Al) 0.06933–0.99	32	5
LIQUID phase:ag-al:liquid	liquid	liquid	stable in 5 of 5 calculated diagram(s): 829.98–2500 K, x(Al) 0–1	74	5

BCC_A2 (Ag–Al)

Id: phase:ag-al: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 5 of 5 calculated diagram(s): 859.31–2500 K, x(Al) 0.20553–1
Literature: 20 values (20 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:ag-al:bcc-a2
paper: paper:10.1007/bf00810049:β, paper:10.1016/j.jallcom.2004.04.126:β
system_alias: system_alias:ag-al:beta
tdb: tdb:AgAl-04Wit.tdb:BCC_A2, tdb:AgAl-20Ter.tdb:BCC_A2, tdb:AgAl-80Spe.tdb:BCC_A2, tdb:AgAl-87Spe.tdb:BCC_A2, tdb:AgAl-95Lim-LB.tdb:BCC_A2

TDB models of BCC_A2 (5): PHASE and CONSTITUENT statements as written

AgAl-04Wit.tdb: BCC_A2, type code %B, sha256 5e45c3ca7a36f2e6…

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

AgAl-20Ter.tdb: BCC_A2, type code %B, sha256 a837f56ad4c96476…

42: PHASE BCC_A2 %B 2 1 3 !
43: CONST BCC_A2 : AG AL : VA : !

AgAl-80Spe.tdb: BCC_A2, type code %B, sha256 f7ece3c580423ee3…

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

AgAl-87Spe.tdb: BCC_A2, type code %B, sha256 bc64253f66e7370a…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : AG AL : VA : !

AgAl-95Lim-LB.tdb: BCC_A2, type code %B, sha256 50d3ba34c63e1b8b…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : AG AL : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2004.04.126 V.T. Witusiewicz, U. Hecht, S.G. Fries, S. Rex, The Ag–Al–Cu system, Journal of Alloys and Compounds 385, 133-143 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/BF00810049 P.J. Spencer, O. Kubaschewski, Monatshefte Chem., 118, 155-67(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(95)00014-6 S.S. Lim, P.L. Rossiter, J.E. Tibballs, Calphad, 19, 131-41(1995).
assessment that models this phase
doi:10.1016/j.calphad.2020.101739 S. Terlicka, A. Debski, W. Gierlotka, A. Wierzbicka-Miernik, A. Budziak, A. Sypien, M. Zabrocki, W. Gasior, Calphad, 68, 101739(2020).
assessment that models this phase

CUB_A13 (Ag–Al)

Id: phase:ag-al:cub-a13; status assigned
Structure: beta-Mn · A13 · cP20 · P4_132 (213); type st:a13-beta-mn-cp20; tier A: standard phase name; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 300–740.16 K, x(Al) 0.16245–0.31021
Literature: 6 values (6 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:ag-al:cub-a13
paper: paper:10.1007/bf00810049:μ, paper:10.1016/j.jallcom.2004.04.126:µ
system_alias: system_alias:ag-al:mu
tdb: tdb:AgAl-04Wit.tdb:CUB_A13, tdb:AgAl-20Ter.tdb:CUB_A13, tdb:AgAl-80Spe.tdb:CUB_A13, tdb:AgAl-87Spe.tdb:CUB_A13, tdb:AgAl-95Lim-LB.tdb:CUB_A13

TDB models of CUB_A13 (5): PHASE and CONSTITUENT statements as written

AgAl-04Wit.tdb: CUB_A13, type code %, sha256 5e45c3ca7a36f2e6…

43: PHASE CUB_A13 % 2 1 1 !
44: CONST CUB_A13 : AG AL : VA : !

AgAl-20Ter.tdb: CUB_A13, type code %, sha256 a837f56ad4c96476…

52: PHASE CUB_A13 % 2 1 1 !
53: CONST CUB_A13 : AG AL : VA : !

AgAl-80Spe.tdb: CUB_A13, type code %, sha256 f7ece3c580423ee3…

46: PHASE CUB_A13 % 2 1 1 !
47: CONST CUB_A13 : AG AL : VA : !

AgAl-87Spe.tdb: CUB_A13, type code %, sha256 bc64253f66e7370a…

51: PHASE CUB_A13 % 2 1 1 !
52: CONST CUB_A13 : AG AL : VA : !

AgAl-95Lim-LB.tdb: CUB_A13, type code %, sha256 50d3ba34c63e1b8b…

42: PHASE CUB_A13 % 2 1 1 !
43: CONST CUB_A13 : AG AL : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2004.04.126 V.T. Witusiewicz, U. Hecht, S.G. Fries, S. Rex, The Ag–Al–Cu system, Journal of Alloys and Compounds 385, 133-143 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/BF00810049 P.J. Spencer, O. Kubaschewski, Monatshefte Chem., 118, 155-67(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(95)00014-6 S.S. Lim, P.L. Rossiter, J.E. Tibballs, Calphad, 19, 131-41(1995).
assessment that models this phase
doi:10.1016/j.calphad.2020.101739 S. Terlicka, A. Debski, W. Gierlotka, A. Wierzbicka-Miernik, A. Budziak, A. Sypien, M. Zabrocki, W. Gasior, Calphad, 68, 101739(2020).
assessment that models this phase

FCC_A1 (Ag–Al)

Id: phase:ag-al: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 5 of 5 calculated diagram(s): 300–2499.72 K, x(Al) 0–1
Literature: 25 values (25 accepted) from 2 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:ag-al:fcc-a1
paper: paper:10.1007/bf00810049:(Ag), paper:10.1007/bf00810049:(Al), paper:10.1016/j.jallcom.2004.04.126:(Ag), paper:10.1016/j.jallcom.2004.04.126:(Al)
tdb: tdb:AgAl-04Wit.tdb:FCC_A1, tdb:AgAl-20Ter.tdb:FCC_A1, tdb:AgAl-80Spe.tdb:FCC_A1, tdb:AgAl-87Spe.tdb:FCC_A1, tdb:AgAl-95Lim-LB.tdb:FCC_A1

TDB models of FCC_A1 (5): PHASE and CONSTITUENT statements as written

AgAl-04Wit.tdb: FCC_A1, type code %A, sha256 5e45c3ca7a36f2e6…

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

AgAl-20Ter.tdb: FCC_A1, type code %A, sha256 a837f56ad4c96476…

37: PHASE FCC_A1 %A 2 1 1 !
38: CONST FCC_A1 : AG% AL% : VA : !

AgAl-80Spe.tdb: FCC_A1, type code %A, sha256 f7ece3c580423ee3…

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

AgAl-87Spe.tdb: FCC_A1, type code %A, sha256 bc64253f66e7370a…

36: PHASE FCC_A1 %A 2 1 1 !
37: CONST FCC_A1 : AG% AL% : VA : !

AgAl-95Lim-LB.tdb: FCC_A1, type code %A, sha256 50d3ba34c63e1b8b…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : AG% AL% : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2004.04.126 V.T. Witusiewicz, U. Hecht, S.G. Fries, S. Rex, The Ag–Al–Cu system, Journal of Alloys and Compounds 385, 133-143 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/BF00810049 P.J. Spencer, O. Kubaschewski, Monatshefte Chem., 118, 155-67(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(95)00014-6 S.S. Lim, P.L. Rossiter, J.E. Tibballs, Calphad, 19, 131-41(1995).
assessment that models this phase
doi:10.1016/j.calphad.2020.101739 S. Terlicka, A. Debski, W. Gierlotka, A. Wierzbicka-Miernik, A. Budziak, A. Sypien, M. Zabrocki, W. Gasior, Calphad, 68, 101739(2020).
assessment that models this phase

HCP_A3 (Ag–Al)

Id: phase:ag-al: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 5 of 5 calculated diagram(s): 300–1007.61 K, x(Al) 0.06933–0.99
Literature: 32 values (32 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:ag-al:hcp-a3
paper: paper:10.1007/bf00810049:ζ, paper:10.1016/j.jallcom.2004.04.126:ζ
system_alias: system_alias:ag-al:zeta
tdb: tdb:AgAl-04Wit.tdb:HCP_A3, tdb:AgAl-20Ter.tdb:HCP_A3, tdb:AgAl-80Spe.tdb:HCP_A3, tdb:AgAl-87Spe.tdb:HCP_A3, tdb:AgAl-95Lim-LB.tdb:HCP_A3

TDB models of HCP_A3 (5): PHASE and CONSTITUENT statements as written

AgAl-04Wit.tdb: HCP_A3, type code %A, sha256 5e45c3ca7a36f2e6…

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

AgAl-20Ter.tdb: HCP_A3, type code %A, sha256 a837f56ad4c96476…

47: PHASE HCP_A3 %A 2 1 0.5 !
48: CONST HCP_A3 : AG AL : VA : !

AgAl-80Spe.tdb: HCP_A3, type code %A, sha256 f7ece3c580423ee3…

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

AgAl-87Spe.tdb: HCP_A3, type code %A, sha256 bc64253f66e7370a…

46: PHASE HCP_A3 %A 2 1 0.5 !
47: CONST HCP_A3 : AG AL : VA : !

AgAl-95Lim-LB.tdb: HCP_A3, type code %A, sha256 50d3ba34c63e1b8b…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : AG AL : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2004.04.126 V.T. Witusiewicz, U. Hecht, S.G. Fries, S. Rex, The Ag–Al–Cu system, Journal of Alloys and Compounds 385, 133-143 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/BF00810049 P.J. Spencer, O. Kubaschewski, Monatshefte Chem., 118, 155-67(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(95)00014-6 S.S. Lim, P.L. Rossiter, J.E. Tibballs, Calphad, 19, 131-41(1995).
assessment that models this phase
doi:10.1016/j.calphad.2020.101739 S. Terlicka, A. Debski, W. Gierlotka, A. Wierzbicka-Miernik, A. Budziak, A. Sypien, M. Zabrocki, W. Gasior, Calphad, 68, 101739(2020).
assessment that models this phase

LIQUID (Ag–Al)

Id: phase:ag-al:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 829.98–2500 K, x(Al) 0–1
Literature: 74 values (74 accepted) from 2 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:ag-al:liquid
paper: paper:10.1007/bf00810049:L, paper:10.1016/j.jallcom.2004.04.126:L, paper:10.1016/j.jallcom.2004.04.126:liquid
tdb: tdb:AgAl-04Wit.tdb:LIQUID, tdb:AgAl-20Ter.tdb:LIQUID, tdb:AgAl-80Spe.tdb:LIQUID, tdb:AgAl-87Spe.tdb:LIQUID, tdb:AgAl-95Lim-LB.tdb:LIQUID

TDB models of LIQUID (5): PHASE and CONSTITUENT statements as written

AgAl-04Wit.tdb: LIQUID, type code %, sha256 5e45c3ca7a36f2e6…

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

AgAl-20Ter.tdb: LIQUID, type code %, sha256 a837f56ad4c96476…

32: PHASE LIQUID:L % 1 1 !
33: CONST LIQUID:L : AG AL : !

AgAl-80Spe.tdb: LIQUID, type code %, sha256 f7ece3c580423ee3…

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

AgAl-87Spe.tdb: LIQUID, type code %, sha256 bc64253f66e7370a…

31: PHASE LIQUID:L % 1 1 !
32: CONST LIQUID:L : AG AL : !

AgAl-95Lim-LB.tdb: LIQUID, type code %, sha256 50d3ba34c63e1b8b…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : AG AL : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2004.04.126 V.T. Witusiewicz, U. Hecht, S.G. Fries, S. Rex, The Ag–Al–Cu system, Journal of Alloys and Compounds 385, 133-143 (2004).
assessment that models this phase; reports values for this phase
doi:10.1007/BF00810049 P.J. Spencer, O. Kubaschewski, Monatshefte Chem., 118, 155-67(1987).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(95)00014-6 S.S. Lim, P.L. Rossiter, J.E. Tibballs, Calphad, 19, 131-41(1995).
assessment that models this phase
doi:10.1016/j.calphad.2020.101739 S. Terlicka, A. Debski, W. Gierlotka, A. Wierzbicka-Miernik, A. Budziak, A. Sypien, M. Zabrocki, W. Gasior, Calphad, 68, 101739(2020).
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}
}