Ag–Sc phases

7 phases (tier A 6, 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–Sc system page · Markdown · field reference

Phases of the Ag–Sc system (7)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AG2SC_C11B phase:ag-sc:ag2sc-c11b	MoSi2 · C11_b · tI6 · I4/mmm (139)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1427.79 K, x(Sc) 0.33333–0.33333	7	2
AG4SC_D1A phase:ag-sc:ag4sc-d1a	MoNi4 · D1_a · tI10 · I4/m (87)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1217.88 K, x(Sc) 0.2–0.2	6	2
AGSC_B2 phase:ag-sc:agsc-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1502.89 K, x(Sc) 0.5–0.5	6	2
BCC_A2 phase:ag-sc:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1607.9–2499.64 K, x(Sc) 0.99988–1	3	2
FCC_A1 phase:ag-sc:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1234.93 K, x(Sc) 0–0.11506	6	2
HCP_A3 phase:ag-sc:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1812.9 K, x(Sc) 0.99985–1	2	2
LIQUID phase:ag-sc:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1167.38–2500 K, x(Sc) 0–1	20	2

AG2SC_C11B (Ag–Sc)

Id: phase:ag-sc:ag2sc-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, Sc 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–1427.79 K, x(Sc) 0.33333–0.33333
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-sc:ag2sc-c11b
paper: paper:10.1016/j.jallcom.2008.02.018:Ag2Sc
tdb: tdb:AgSc-08GTT.tdb:AG2SC_C11B, tdb:AgSc-09Liu.tdb:AG2SC_C11B

TDB models of AG2SC_C11B (2): PHASE and CONSTITUENT statements as written

AgSc-08GTT.tdb: AG2SC_C11B, type code %, sha256 db418ccc9bec81b8…

45: PHASE AG2SC_C11B % 2 2 1 !
46: CONST AG2SC_C11B : AG : SC : !

AgSc-09Liu.tdb: AG2SC_C11B, type code %, sha256 e16ba0ef60c77667…

50: PHASE AG2SC_C11B % 2 2 1 !
51: CONST AG2SC_C11B : AG : SC : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2008.02.018 X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(75)90196-4 Isolde Stapf, Gonde Kiessler, Erich Gebhardt, Das system Silber-Scandium, Journal of the Less Common Metals 39, 219-225 (1975).
cited as the source of values for this phase
doi:10.1007/bf02868084 K. A. Gschneidner, F. W. Calderwood, The Ag−Sc (Silver-Scandium) system, Bulletin of Alloy Phase Diagrams 4, 375-377 (1983).
cited as the source of values for this phase

AG4SC_D1A (Ag–Sc)

Id: phase:ag-sc:ag4sc-d1a; status assigned
Structure: MoNi4 · D1_a · tI10 · I4/m (87); type st:d1-a-moni4-ti10; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaabsxm and oqmd-10666, space group 87
Stoichiometry: Ag 0.8000, Sc 0.2000
Stability: stable in 2 of 2 calculated diagram(s): 300–1217.88 K, x(Sc) 0.2–0.2
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ag-sc:ag4sc-d1a
mp: mp:mp-aaaabsxm
oqmd: oqmd:oqmd-10666
paper: paper:10.1016/j.jallcom.2008.02.018:Ag4Sc
tdb: tdb:AgSc-08GTT.tdb:AG4SC_D1A, tdb:AgSc-09Liu.tdb:AG4SC_D1A

TDB models of AG4SC_D1A (2): PHASE and CONSTITUENT statements as written

AgSc-08GTT.tdb: AG4SC_D1A, type code %, sha256 db418ccc9bec81b8…

40: PHASE AG4SC_D1A % 2 4 1 !
41: CONST AG4SC_D1A : AG : SC : !

AgSc-09Liu.tdb: AG4SC_D1A, type code %, sha256 e16ba0ef60c77667…

45: PHASE AG4SC_D1A % 2 4 1 !
46: CONST AG4SC_D1A : AG : SC : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2008.02.018 X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868084 K. A. Gschneidner, F. W. Calderwood, The Ag−Sc (Silver-Scandium) system, Bulletin of Alloy Phase Diagrams 4, 375-377 (1983).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90196-4 Isolde Stapf, Gonde Kiessler, Erich Gebhardt, Das system Silber-Scandium, Journal of the Less Common Metals 39, 219-225 (1975).
cited as the source of values for this phase

AGSC_B2 (Ag–Sc)

Id: phase:ag-sc:agsc-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-aaaaaqqf and oqmd-10665, space group 221
Stoichiometry: Ag 0.5000, Sc 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 300–1502.89 K, x(Sc) 0.5–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ag-sc:agsc-b2
mp: mp:mp-aaaaaqqf
oqmd: oqmd:oqmd-10665
paper: paper:10.1016/j.jallcom.2008.02.018:AgSc
tdb: tdb:AgSc-08GTT.tdb:AGSC_B2, tdb:AgSc-09Liu.tdb:AGSC_B2

TDB models of AGSC_B2 (2): PHASE and CONSTITUENT statements as written

AgSc-08GTT.tdb: AGSC_B2, type code %, sha256 db418ccc9bec81b8…

50: PHASE AGSC_B2 % 2 1 1 !
51: CONST AGSC_B2 : AG : SC : !

AgSc-09Liu.tdb: AGSC_B2, type code %, sha256 e16ba0ef60c77667…

55: PHASE AGSC_B2 % 2 1 1 !
56: CONST AGSC_B2 : AG : SC : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2008.02.018 X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(75)90196-4 Isolde Stapf, Gonde Kiessler, Erich Gebhardt, Das system Silber-Scandium, Journal of the Less Common Metals 39, 219-225 (1975).
cited as the source of values for this phase

BCC_A2 (Ag–Sc)

Id: phase:ag-sc: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): 1607.9–2499.64 K, x(Sc) 0.99988–1
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-sc:bcc-a2
paper: paper:10.1016/j.jallcom.2008.02.018:βSc
tdb: tdb:AgSc-08GTT.tdb:BCC_A2, tdb:AgSc-09Liu.tdb:BCC_A2

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

AgSc-08GTT.tdb: BCC_A2, type code %, sha256 db418ccc9bec81b8…

30: PHASE BCC_A2 % 2 1 3 !
31: CONST BCC_A2 : AG SC% : VA : !

AgSc-09Liu.tdb: BCC_A2, type code %B, sha256 e16ba0ef60c77667…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : AG SC% : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2008.02.018 X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868084 K. A. Gschneidner, F. W. Calderwood, The Ag−Sc (Silver-Scandium) system, Bulletin of Alloy Phase Diagrams 4, 375-377 (1983).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90196-4 Isolde Stapf, Gonde Kiessler, Erich Gebhardt, Das system Silber-Scandium, Journal of the Less Common Metals 39, 219-225 (1975).
cited as the source of values for this phase

FCC_A1 (Ag–Sc)

Id: phase:ag-sc: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): 300–1234.93 K, x(Sc) 0–0.11506
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-sc:fcc-a1
paper: paper:10.1016/j.jallcom.2008.02.018:(Ag)
tdb: tdb:AgSc-08GTT.tdb:FCC_A1, tdb:AgSc-09Liu.tdb:FCC_A1

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

AgSc-08GTT.tdb: FCC_A1, type code %, sha256 db418ccc9bec81b8…

25: PHASE FCC_A1 % 2 1 1 !
26: CONST FCC_A1 : AG% SC : VA : !

AgSc-09Liu.tdb: FCC_A1, type code %A, sha256 e16ba0ef60c77667…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : AG% SC : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2008.02.018 X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02868084 K. A. Gschneidner, F. W. Calderwood, The Ag−Sc (Silver-Scandium) system, Bulletin of Alloy Phase Diagrams 4, 375-377 (1983).
cited as the source of values for this phase
doi:10.1016/0022-5088(75)90196-4 Isolde Stapf, Gonde Kiessler, Erich Gebhardt, Das system Silber-Scandium, Journal of the Less Common Metals 39, 219-225 (1975).
cited as the source of values for this phase

HCP_A3 (Ag–Sc)

Id: phase:ag-sc: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): 300–1812.9 K, x(Sc) 0.99985–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-sc:hcp-a3
paper: paper:10.1016/j.jallcom.2008.02.018:αSc
tdb: tdb:AgSc-08GTT.tdb:HCP_A3, tdb:AgSc-09Liu.tdb:HCP_A3

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

AgSc-08GTT.tdb: HCP_A3, type code %, sha256 db418ccc9bec81b8…

35: PHASE HCP_A3 % 2 1 0.5 !
36: CONST HCP_A3 : AG SC% : VA : !

AgSc-09Liu.tdb: HCP_A3, type code %A, sha256 e16ba0ef60c77667…

40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : AG SC% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2008.02.018 X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(75)90196-4 Isolde Stapf, Gonde Kiessler, Erich Gebhardt, Das system Silber-Scandium, Journal of the Less Common Metals 39, 219-225 (1975).
cited as the source of values for this phase

LIQUID (Ag–Sc)

Id: phase:ag-sc:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1167.38–2500 K, x(Sc) 0–1
Literature: 20 values (20 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-sc:liquid
paper: paper:10.1016/j.jallcom.2008.02.018:L
tdb: tdb:AgSc-08GTT.tdb:LIQUID, tdb:AgSc-09Liu.tdb:LIQUID

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

AgSc-08GTT.tdb: LIQUID, type code %, sha256 db418ccc9bec81b8…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : AG SC : !

AgSc-09Liu.tdb: LIQUID, type code %, sha256 e16ba0ef60c77667…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : AG SC : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2008.02.018 X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(75)90196-4 Isolde Stapf, Gonde Kiessler, Erich Gebhardt, Das system Silber-Scandium, Journal of the Less Common Metals 39, 219-225 (1975).
cited as the source of values for this phase
doi:10.1007/bf02868084 K. A. Gschneidner, F. W. Calderwood, The Ag−Sc (Silver-Scandium) system, Bulletin of Alloy Phase Diagrams 4, 375-377 (1983).
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}
}