Ag–Sm system

39 accepted literature values from 1 paper(s) (experimental 21, model 13, DFT 2, unspecified 3); 1 calculated phase diagram(s). 8 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (9) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	21
model	13
DFT	2
unspecified	3

Accepted values by property group
Property group	Values
invariant reaction	21
phase transition	4
formation	14

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
AgSm-20Zho.tdb	J. Zhou, B. Hu, Y. Jiang, C. Qiu, Y. Du, H. Yin, J. Phase Equilib. Diffus., 41, 257-68(2020). doi:10.1007/s11669-020-00813-5	`032995b1ab9a604b3298a9574fd08f16a76b37e63b56e35a659fd2ff5512d608`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AgSm-20Zho.tdb	1195.4	LIQUID (x(Sm) 0.86512) + HCP_A3 (x(Sm) 0.99927) + BCC_A2 (x(Sm) 0.99937)
AgSm-20Zho.tdb	1061.99	AG51SM14 (x(Sm) 0.21538) + AG2SM_BETA (x(Sm) 0.33333) + LIQUID (x(Sm) 0.33647)
AgSm-20Zho.tdb	1061.99	AG51SM14 (x(Sm) 0.21538) + AG2SM_BETA (x(Sm) 0.33333) + LIQUID (x(Sm) 0.33641)
AgSm-20Zho.tdb	1061.99	AG51SM14 (x(Sm) 0.21538) + AG2SM_BETA (x(Sm) 0.33333) + LIQUID (x(Sm) 0.3362)
AgSm-20Zho.tdb	1054.77	AG2SM_BETA (x(Sm) 0.33333) + LIQUID (x(Sm) 0.35721) + AGSM_B2 (x(Sm) 0.5)
AgSm-20Zho.tdb	1054.77	AG2SM_BETA (x(Sm) 0.33333) + LIQUID (x(Sm) 0.35752) + AGSM_B2 (x(Sm) 0.5)
AgSm-20Zho.tdb	1054.77	AG2SM_BETA (x(Sm) 0.33333) + LIQUID (x(Sm) 0.35712) + AGSM_B2 (x(Sm) 0.5)
AgSm-20Zho.tdb	1030.62	FCC_A1 (x(Sm) 0) + LIQUID (x(Sm) 0.09154) + AG51SM14 (x(Sm) 0.21538)
AgSm-20Zho.tdb	1030.62	FCC_A1 (x(Sm) 0) + LIQUID (x(Sm) 0.09153) + AG51SM14 (x(Sm) 0.21538)
AgSm-20Zho.tdb	966.92	AG2SM_BETA (x(Sm) 0.33333) + AG2SM_ALPHA (x(Sm) 0.33333) + AGSM_B2 (x(Sm) 0.5)
AgSm-20Zho.tdb	966.92	AG51SM14 (x(Sm) 0.21538) + AG2SM_ALPHA (x(Sm) 0.33333) + AG2SM_BETA (x(Sm) 0.33333)
AgSm-20Zho.tdb	953.55	AGSM_B2 (x(Sm) 0.5) + LIQUID (x(Sm) 0.73204) + HCP_A3 (x(Sm) 0.99917)
AgSm-20Zho.tdb	953.55	AGSM_B2 (x(Sm) 0.5) + LIQUID (x(Sm) 0.73207) + HCP_A3 (x(Sm) 0.99917)
AgSm-20Zho.tdb	930.02	AGSM_B2 (x(Sm) 0.5) + HCP_A3 (x(Sm) 0.99931) + RHOMB_C19 (x(Sm) 1)
AgSm-20Zho.tdb	930.02	AGSM_B2 (x(Sm) 0.5) + HCP_A3 (x(Sm) 0.99931) + RHOMB_C19 (x(Sm) 1)
AgSm-20Zho.tdb	930.02	AGSM_B2 (x(Sm) 0.5) + HCP_A3 (x(Sm) 0.99931) + RHOMB_C19 (x(Sm) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ag–Sm system (21)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1233.15	congruent melting: Liquid -> AgSm	Liquid: Sm 0.5; AgSm: Sm 0.5	experimental	[1] Zhou 2020 cites Stapf 1980 doi	Table 6, p. 9, row 13 report
1233.15	congruent melting: Liquid -> AgSm	Liquid: Ag 0.5, Sm 0.5; AgSm: Ag 0.5, Sm 0.5	experimental	[1] Zhou 2020 cites Gebhardt 1964	Table 6, p. 9, row 14 report
1226.15	congruent melting: Liquid -> AgSm	Liquid: Sm 0.5; AgSm: Sm 0.5	model	[1] Zhou 2020	Table 6, p. 9, row 12 report
1214.15	congruent melting: Liquid -> Ag51Sm14	Liquid: Sm 0.215; Ag51Sm14: Sm 0.215	model	[1] Zhou 2020	Table 6, p. 9, row 15 report
1208.15	congruent melting: Liquid -> Ag51Sm14	Liquid: Ag 0.784615, Sm 0.215385; Ag51Sm14: Ag 0.784615, Sm 0.215385	experimental	[1] Zhou 2020 cites Stapf 1980 doi	Table 6, p. 9, row 16 report
1183.15	congruent melting: Liquid -> Ag51Sm14	Liquid: Ag 0.784615, Sm 0.215385; Ag51Sm14: Ag 0.784615, Sm 0.215385	experimental	[1] Zhou 2020 cites Gebhardt 1964	Table 6, p. 9, row 17 report
1063.15	peritectic		experimental	[1] Zhou 2020 cites Stapf 1980 doi	p. 4 report	According to their work, three stoichiometric compounds Ag3Sm (melting point 935 C), bAg2Sm (peritectic formation at 790 C), and AgSm (melting point 960 C) have been reported.
1063.15	peritectic: Liquid + Ag51Sm14 -> βAg2Sm	Ag51Sm14: Sm 0.36; βAg2Sm: Ag 0.666667, Sm 0.333333	experimental	[1] Zhou 2020 cites Stapf 1980 doi	Table 6, p. 9, row 6 report
1062.15	peritectic: Liquid + Ag51Sm14 -> βAg2Sm	Liquid: Sm 0.336; Ag51Sm14: Sm 0.215; βAg2Sm: Sm 0.333	model	[1] Zhou 2020	Table 6, p. 9, row 5 report
1055.15	eutectic: Liquid -> βAg2Sm + AgSm	Liquid: Sm 0.356; βAg2Sm: Sm 0.333; AgSm: Sm 0.5	model	[1] Zhou 2020	Table 6, p. 9, row 7 report
1054.15	eutectic: Liquid -> (Ag) + Ag51Sm14	Ag51Sm14: Ag 0.784615, Sm 0.215385	experimental	[1] Zhou 2020 cites Gschneidner 1970	Table 6, p. 9, row 4 report
1048.15	eutectic: Liquid -> (Ag) + Ag51Sm14	Liquid: Sm 0.115; Ag51Sm14: Ag 0.784615, Sm 0.215385	experimental	[1] Zhou 2020 cites Gebhardt 1964	Table 6, p. 9, row 3 report
1048.15	eutectic: Liquid -> βAg2Sm + AgSm	Liquid: Sm 0.37; βAg2Sm: Ag 0.666667, Sm 0.333333; AgSm: Ag 0.5, Sm 0.5	experimental	[1] Zhou 2020 cites Stapf 1980 doi	Table 6, p. 9, row 8 report
1043.15	peritectic		experimental	[1] Zhou 2020 cites Gebhardt 1964	p. 2 report	In their work, three compounds Ag3Sm (melting point 910 C), Ag2Sm (peritectic formation at 770 C), and AgSm (melting point 960 C) have been reported.
1033.15	eutectic: Liquid -> (Ag) + Ag51Sm14	Liquid: Sm 0.1; Ag51Sm14: Ag 0.784615, Sm 0.215385	experimental	[1] Zhou 2020 cites Stapf 1980 doi	Table 6, p. 9, row 2 report
1030.15	eutectic: Liquid -> (Ag) + Ag51Sm14	Liquid: Sm 0.092; (Ag): Sm 0; Ag51Sm14: Sm 0.215	model	[1] Zhou 2020	Table 6, p. 9, row 1 report
967.15	polymorphic: αAg2Sm -> βAg2Sm	αAg2Sm: Ag 0.666667, Sm 0.333333; βAg2Sm: Ag 0.666667, Sm 0.333333	experimental	[1] Zhou 2020 cites Stapf 1980 doi	Table 6, p. 9, row 19 report
967.15	polymorphic: αAg2Sm -> βAg2Sm	αAg2Sm: Sm 0.333; βAg2Sm: Ag 0.666667, Sm 0.333333	model	[1] Zhou 2020	Table 6, p. 9, row 18 report
963.15	eutectic: Liquid -> AgSm + (αSm)	Liquid: Sm 0.76; AgSm: Ag 0.5, Sm 0.5; (αSm): Ag 0.666667, Sm 0.333333	experimental	[1] Zhou 2020 cites Gebhardt 1964	Table 6, p. 9, row 11 report
953.15	eutectic: Liquid -> AgSm + (αSm)	Liquid: Sm 0.743; AgSm: Sm 0.5; (αSm): Sm 1	model	[1] Zhou 2020	Table 6, p. 9, row 9 report
948.15	eutectic: Liquid -> AgSm + (αSm)	Liquid: Sm 0.82; AgSm: Ag 0.5, Sm 0.5; (αSm): Ag 0.666667, Sm 0.333333	experimental	[1] Zhou 2020 cites Stapf 1980 doi	Table 6, p. 9, row 10 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Ag–Sm system (14)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Ag51Sm14	Ag51Sm14	-28 kJ/mol-atom	298.15	model	-23.765 (mp-aaacrjve)		[1] Zhou 2020 cites Niessen 1983 doi	Table 7, p. 10, row 10 report
Ag51Sm14	Ag51Sm14	-23.7 kJ/mol-atom	298.15	unspecified	-23.765 (mp-aaacrjve)		[1] Zhou 2020 cites Sudavtsova 2014 doi	Table 7, p. 10, row 12 report
Ag51Sm14	Ag51Sm14	-21.9 kJ/mol-atom	298.15	model	-23.765 (mp-aaacrjve)		[1] Zhou 2020	Table 7, p. 10, row 14 report
Ag51Sm14	Ag51Sm14	-16.8 kJ/mol-atom ± 3.5	298.15	experimental	-23.765 (mp-aaacrjve)		[1] Zhou 2020 cites Meschel 2006 doi	Table 7, p. 10, row 11 report
Ag51Sm14		-15.8 kJ/mol-atom	0.15	DFT			[1] Zhou 2020 cites The	Table 7, p. 10, row 13 report
AgSm	AgSm	-42 kJ/mol-atom	298.15	model	-26.737 (mp-aaaaadrf)	-28.228 (oqmd-10667)	[1] Zhou 2020 cites Niessen 1983 doi	Table 7, p. 10, row 1 report
AgSm	AgSm	-37 kJ/mol-atom ± 2.7	298.15	experimental	-26.737 (mp-aaaaadrf)	-28.228 (oqmd-10667)	[1] Zhou 2020 cites Meschel 2006 doi	Table 7, p. 10, row 2 report
AgSm		-28.2 kJ/mol-atom	0.15	DFT			[1] Zhou 2020 cites The	Table 7, p. 10, row 4 report
AgSm	AgSm	-27.8 kJ/mol-atom	298.15	model	-26.737 (mp-aaaaadrf)	-28.228 (oqmd-10667)	[1] Zhou 2020	Table 7, p. 10, row 5 report
AgSm	AgSm	-23 kJ/mol-atom	298.15	unspecified	-26.737 (mp-aaaaadrf)	-28.228 (oqmd-10667)	[1] Zhou 2020 cites Sudavtsova 2014 doi	Table 7, p. 10, row 3 report
αAg2Sm	Ag2Sm	-40 kJ/mol-atom	298.15	model		-28.101 (oqmd-1378024)	[1] Zhou 2020 cites Niessen 1983 doi	Table 7, p. 10, row 6 report
αAg2Sm	Ag2Sm	-25.6 kJ/mol-atom	298.15	model		-28.101 (oqmd-1378024)	[1] Zhou 2020	Table 7, p. 10, row 9 report
αAg2Sm	Ag2Sm	-24.1 kJ/mol-atom ± 2.4	298.15	experimental		-28.101 (oqmd-1378024)	[1] Zhou 2020 cites Meschel 2006 doi	Table 7, p. 10, row 7 report
αAg2Sm	Ag2Sm	-23.5 kJ/mol-atom	298.15	unspecified		-28.101 (oqmd-1378024)	[1] Zhou 2020 cites Sudavtsova 2014 doi	Table 7, p. 10, row 8 report

Other properties

Phase transition (4)

Phase transition, Ag–Sm system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1183.15 K	1183.15	Ag3Sm	experimental	[1] Zhou 2020 cites Gebhardt 1964	p. 2 report	In their work, three compounds Ag3Sm (melting point 910 C), Ag2Sm (peritectic formation at 770 C), and AgSm (melting point 960 C) have been reported.
Phase transition	1208.15 K	1208.15	Ag3Sm	experimental	[1] Zhou 2020 cites Stapf 1980 doi	p. 4 report	According to their work, three stoichiometric compounds Ag3Sm (melting point 935 C), bAg2Sm (peritectic formation at 790 C), and AgSm (melting point 960 C) have been reported.
Phase transition	1233.15 K	1233.15	AgSm	experimental	[1] Zhou 2020 cites Gebhardt 1964	p. 2 report	In their work, three compounds Ag3Sm (melting point 910 C), Ag2Sm (peritectic formation at 770 C), and AgSm (melting point 960 C) have been reported.
Phase transition	1233.15 K	1233.15	AgSm	experimental	[1] Zhou 2020 cites Stapf 1980 doi	p. 4 report	According to their work, three stoichiometric compounds Ag3Sm (melting point 935 C), bAg2Sm (peritectic formation at 790 C), and AgSm (melting point 960 C) have been reported.

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

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). doi:10.1007/s11669-020-00813-5

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
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 the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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). 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_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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}
}