Ag–Sm phases

9 phases (tier A 5, tier C 1, liquid 1, needs_review 2); 9 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–Sm system page · Markdown · field reference

Phases of the Ag–Sm system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
AG2SM_ALPHA phase:ag-sm:ag2sm-alpha		needs_review	stable in 1 of 1 calculated diagram(s): 300–966.92 K, x(Sm) 0.33333–0.33333	6	1
AG2SM_BETA phase:ag-sm:ag2sm-beta		needs_review	stable in 1 of 1 calculated diagram(s): 966.92–1061.99 K, x(Sm) 0.33333–0.33333	6	1
AG51SM14 phase:ag-sm:ag51sm14	Ag51Gd14 · hP68 · P6/m (175)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1214.39 K, x(Sm) 0.21538–0.21538	14	1
AGSM_B2 phase:ag-sm:agsm-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1226.63 K, x(Sm) 0.5–0.5	13	1
BCC_A2 phase:ag-sm:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1195.4–2500 K, x(Sm) 0.99937–1	0	1
FCC_A1 phase:ag-sm:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1235.93 K, x(Sm) 0–0	4	1
HCP_A3 phase:ag-sm:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 930.02–1195.4 K, x(Sm) 0.99913–1	0	1
LIQUID phase:ag-sm:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 953.55–2500 K, x(Sm) 0–1	17	1
RHOMB_C19 phase:ag-sm:rhomb-c19	CdCl2 · C19 · hR3 · R-3m (166)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1191.87 K, x(Sm) 1–1	0	1

AG2SM_ALPHA (Ag–Sm)

Id: phase:ag-sm:ag2sm-alpha; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_oqmd): I4/mmm (139) — on-hull OQMD Ag2 Sm1 at x(SM)=0.3333
Candidate (sgte_mmc2): (Ag2Sm-alpha) — Hallstedt 2025 mmc2 row for AG2SM_ALPHA: Ag2Sm-alpha
Stoichiometry: Ag 0.6667, Sm 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–966.92 K, x(Sm) 0.33333–0.33333
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-sm:ag2sm-alpha
paper: paper:10.1007/s11669-020-00813-5:αAg2Sm
tdb: tdb:AgSm-20Zho.tdb:AG2SM_ALPHA

TDB models of AG2SM_ALPHA (1): PHASE and CONSTITUENT statements as written

AgSm-20Zho.tdb: AG2SM_ALPHA, type code %, sha256 032995b1ab9a604b…

65: PHASE AG2SM_ALPHA % 2 2 1 !
66: CONST AG2SM_ALPHA : AG : SM : !

Example references (5 of 5; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(80)90217-9 Isolde Stapf, Gonde Kiessler, Hermann Jehn, Erich Gebhardt, Adolf Mulokozi, Der aufbau des systems silber-samarium, Journal of the Less Common Metals 71, P19-P27 (1980).
cited as the source of values for this phase
doi:10.1016/0364-5916(83)90030-5 A.K. Niessen, F.R. de Boer, R. Boom, P.F. de Chatel, W.C.M. Mattens, A.R. Miedema, CALPHAD 7 (1983) 51–70.
cited as the source of values for this phase
doi:10.1016/j.jallcom.2005.07.069 S.V. Meschel, O.J. Kleppa, Thermochemistry of some binary alloys of Samarium with the noble metals (Cu, Ag, Au) by high temperature direct synthesis calorimetry, Journal of Alloys and Compounds 416, 93-97 (2006).
cited as the source of values for this phase
doi:10.1134/s0036024414020265 V. S. Sudavtsova, M. A. Shevchenko, V. V. Berezutskii, M. I. Ivanov, V. G. Kudin, Thermodynamic properties of melts of the binary Ag(Au)-Sm systems, Russ. J. Phys. Chem. 88, 200-206 (2014).
cited as the source of values for this phase

AG2SM_BETA (Ag–Sm)

Id: phase:ag-sm:ag2sm-beta; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_oqmd): I4/mmm (139) — on-hull OQMD Ag2 Sm1 at x(SM)=0.3333
Candidate (sgte_mmc2): (Ag2Sm-beta) — Hallstedt 2025 mmc2 row for AG2SM_BETA: Ag2Sm-beta
Stoichiometry: Ag 0.6667, Sm 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 966.92–1061.99 K, x(Sm) 0.33333–0.33333
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-sm:ag2sm-beta
paper: paper:10.1007/s11669-020-00813-5:βAg2Sm
tdb: tdb:AgSm-20Zho.tdb:AG2SM_BETA

TDB models of AG2SM_BETA (1): PHASE and CONSTITUENT statements as written

AgSm-20Zho.tdb: AG2SM_BETA, type code %, sha256 032995b1ab9a604b…

70: PHASE AG2SM_BETA % 2 2 1 !
71: CONST AG2SM_BETA : AG : SM : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(80)90217-9 Isolde Stapf, Gonde Kiessler, Hermann Jehn, Erich Gebhardt, Adolf Mulokozi, Der aufbau des systems silber-samarium, Journal of the Less Common Metals 71, P19-P27 (1980).
cited as the source of values for this phase

AG51SM14 (Ag–Sm)

Id: phase:ag-sm:ag51sm14; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ag 0.7846, Sm 0.2154
Stability: stable in 1 of 1 calculated diagram(s): 300–1214.39 K, x(Sm) 0.21538–0.21538
Literature: 14 values (14 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-sm:ag51sm14
paper: paper:10.1007/s11669-020-00813-5:Ag51Sm14
tdb: tdb:AgSm-20Zho.tdb:AG51SM14

TDB models of AG51SM14 (1): PHASE and CONSTITUENT statements as written

AgSm-20Zho.tdb: AG51SM14, type code %, sha256 032995b1ab9a604b…

60: PHASE AG51SM14 % 2 51 14 !
61: CONST AG51SM14 : AG : SM : !

Example references (5 of 5; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(80)90217-9 Isolde Stapf, Gonde Kiessler, Hermann Jehn, Erich Gebhardt, Adolf Mulokozi, Der aufbau des systems silber-samarium, Journal of the Less Common Metals 71, P19-P27 (1980).
cited as the source of values for this phase
doi:10.1016/0364-5916(83)90030-5 A.K. Niessen, F.R. de Boer, R. Boom, P.F. de Chatel, W.C.M. Mattens, A.R. Miedema, CALPHAD 7 (1983) 51–70.
cited as the source of values for this phase
doi:10.1016/j.jallcom.2005.07.069 S.V. Meschel, O.J. Kleppa, Thermochemistry of some binary alloys of Samarium with the noble metals (Cu, Ag, Au) by high temperature direct synthesis calorimetry, Journal of Alloys and Compounds 416, 93-97 (2006).
cited as the source of values for this phase
doi:10.1134/s0036024414020265 V. S. Sudavtsova, M. A. Shevchenko, V. V. Berezutskii, M. I. Ivanov, V. G. Kudin, Thermodynamic properties of melts of the binary Ag(Au)-Sm systems, Russ. J. Phys. Chem. 88, 200-206 (2014).
cited as the source of values for this phase

AGSM_B2 (Ag–Sm)

Id: phase:ag-sm:agsm-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-aaaaadrf and oqmd-10667, space group 221
Stoichiometry: Ag 0.5000, Sm 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1226.63 K, x(Sm) 0.5–0.5
Literature: 13 values (13 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ag-sm:agsm-b2
mp: mp:mp-aaaaadrf
oqmd: oqmd:oqmd-10667
paper: paper:10.1007/s11669-020-00813-5:AgSm
tdb: tdb:AgSm-20Zho.tdb:AGSM_B2

TDB models of AGSM_B2 (1): PHASE and CONSTITUENT statements as written

AgSm-20Zho.tdb: AGSM_B2, type code %, sha256 032995b1ab9a604b…

75: PHASE AGSM_B2 % 2 1 1 !
76: CONST AGSM_B2 : AG : SM : !

Example references (5 of 5; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(80)90217-9 Isolde Stapf, Gonde Kiessler, Hermann Jehn, Erich Gebhardt, Adolf Mulokozi, Der aufbau des systems silber-samarium, Journal of the Less Common Metals 71, P19-P27 (1980).
cited as the source of values for this phase
doi:10.1016/0364-5916(83)90030-5 A.K. Niessen, F.R. de Boer, R. Boom, P.F. de Chatel, W.C.M. Mattens, A.R. Miedema, CALPHAD 7 (1983) 51–70.
cited as the source of values for this phase
doi:10.1016/j.jallcom.2005.07.069 S.V. Meschel, O.J. Kleppa, Thermochemistry of some binary alloys of Samarium with the noble metals (Cu, Ag, Au) by high temperature direct synthesis calorimetry, Journal of Alloys and Compounds 416, 93-97 (2006).
cited as the source of values for this phase
doi:10.1134/s0036024414020265 V. S. Sudavtsova, M. A. Shevchenko, V. V. Berezutskii, M. I. Ivanov, V. G. Kudin, Thermodynamic properties of melts of the binary Ag(Au)-Sm systems, Russ. J. Phys. Chem. 88, 200-206 (2014).
cited as the source of values for this phase

BCC_A2 (Ag–Sm)

Id: phase:ag-sm: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): 1195.4–2500 K, x(Sm) 0.99937–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-sm:bcc-a2
tdb: tdb:AgSm-20Zho.tdb:BCC_A2

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

AgSm-20Zho.tdb: BCC_A2, type code %B, sha256 032995b1ab9a604b…

45: PHASE BCC_A2 %B 2 1 3 !
46: CONST BCC_A2 : AG SM% : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase

FCC_A1 (Ag–Sm)

Id: phase:ag-sm:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Ag 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–1235.93 K, x(Sm) 0–0
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-sm:fcc-a1
paper: paper:10.1007/s11669-020-00813-5:(Ag)
tdb: tdb:AgSm-20Zho.tdb:FCC_A1

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

AgSm-20Zho.tdb: FCC_A1, type code %A, sha256 032995b1ab9a604b…

40: PHASE FCC_A1 %A 2 1 1 !
41: CONST FCC_A1 : AG : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(80)90217-9 Isolde Stapf, Gonde Kiessler, Hermann Jehn, Erich Gebhardt, Adolf Mulokozi, Der aufbau des systems silber-samarium, Journal of the Less Common Metals 71, P19-P27 (1980).
cited as the source of values for this phase

HCP_A3 (Ag–Sm)

Id: phase:ag-sm: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 1 of 1 calculated diagram(s): 930.02–1195.4 K, x(Sm) 0.99913–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-sm:hcp-a3
tdb: tdb:AgSm-20Zho.tdb:HCP_A3

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

AgSm-20Zho.tdb: HCP_A3, type code %A, sha256 032995b1ab9a604b…

50: PHASE HCP_A3 %A 2 1 0.5 !
51: CONST HCP_A3 : AG SM% : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase

LIQUID (Ag–Sm)

Id: phase:ag-sm:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 953.55–2500 K, x(Sm) 0–1
Literature: 17 values (17 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-sm:liquid
paper: paper:10.1007/s11669-020-00813-5:Liquid
tdb: tdb:AgSm-20Zho.tdb:LIQUID

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

AgSm-20Zho.tdb: LIQUID, type code %, sha256 032995b1ab9a604b…

35: PHASE LIQUID:L % 1 1 !
36: CONST LIQUID:L : AG SM : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-5088(80)90217-9 Isolde Stapf, Gonde Kiessler, Hermann Jehn, Erich Gebhardt, Adolf Mulokozi, Der aufbau des systems silber-samarium, Journal of the Less Common Metals 71, P19-P27 (1980).
cited as the source of values for this phase

RHOMB_C19 (Ag–Sm)

Id: phase:ag-sm:rhomb-c19; status assigned
Structure: CdCl2 · C19 · hR3 · R-3m (166); type st:c19-cdcl2-hr3; tier A: standard phase name; confidence high
Stoichiometry: Sm 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–1191.87 K, x(Sm) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ag-sm:rhomb-c19
tdb: tdb:AgSm-20Zho.tdb:RHOMB_C19

TDB models of RHOMB_C19 (1): PHASE and CONSTITUENT statements as written

AgSm-20Zho.tdb: RHOMB_C19, type code %, sha256 032995b1ab9a604b…

55: PHASE RHOMB_C19 % 1 1 !
56: CONST RHOMB_C19 : SM : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (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}
}