Fe–Sm system

21 accepted literature values from 1 paper(s) (experimental 10, model 7, unspecified 4); 2 calculated phase diagram(s). 1 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 (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	10
model	7
unspecified	4

Accepted values by property group
Property group	Values
invariant reaction	8
heat capacity / entropy / enthalpy	13

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
FeSm-02Zin.tdb	M. Zinkevich, N. Mattern, A. Handstein, O. Gutfleisch, J. Alloys Compd., 339, 118-139(2002). doi:10.1016/S0925-8388(01)01990-9	`f9381a4b6ae265f751a70c7b1f63fa4b333dfedc7bde7e50c8747281e5ab6e15`	viewer · TDB · JSON
FeSm-17Che.tdb	X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). doi:10.1016/j.calphad.2017.07.005	`ee2803e2feb0f4079fedacbaeac954f514b798afe00180bce358ed7098f11454`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FeSm-02Zin.tdb	1625.13	FCC_A1 (x(Sm) 0.00292) + BCC_A2 (x(Sm) 0.00442) + LIQUID (x(Sm) 0.16755)
FeSm-02Zin.tdb	1555.73	FCC_A1 (x(Sm) 0.00293) + FE17SM2 (x(Sm) 0.10526) + LIQUID (x(Sm) 0.25611)
FeSm-02Zin.tdb	1555.73	FCC_A1 (x(Sm) 0.00293) + FE17SM2 (x(Sm) 0.10526) + LIQUID (x(Sm) 0.25591)
FeSm-02Zin.tdb	1286.86	FE17SM2 (x(Sm) 0.10526) + FE3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.54411)
FeSm-02Zin.tdb	1286.86	FE17SM2 (x(Sm) 0.10526) + FE3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.54409)
FeSm-02Zin.tdb	1286.86	FE17SM2 (x(Sm) 0.10526) + FE3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.54414)
FeSm-02Zin.tdb	1194.59	LIQUID (x(Sm) 0.92144) + BCC_A2 (x(Sm) 0.99953) + HCP_A3 (x(Sm) 0.99964)
FeSm-02Zin.tdb	1192.36	RHOMB_C19 (x(Sm) 1) + BCC_A2 (x(Sm) 1) + HCP_A3 (x(Sm) 1)
FeSm-02Zin.tdb	1185.33	FCC_A1 (x(Sm) 1.200e-4) + BCC_A2 (x(Sm) 1.600e-4) + FE17SM2 (x(Sm) 0.10526)
FeSm-02Zin.tdb	1172.48	FE3SM (x(Sm) 0.25) + FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.63119)
FeSm-02Zin.tdb	1172.48	FE3SM (x(Sm) 0.25) + FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.6312)
FeSm-02Zin.tdb	997.59	FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.76803) + HCP_A3 (x(Sm) 0.99916)
FeSm-02Zin.tdb	997.59	FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.76827) + HCP_A3 (x(Sm) 0.99916)
FeSm-02Zin.tdb	977	FE2SM_C15 (x(Sm) 0.33333) + HCP_A3 (x(Sm) 0.99927) + RHOMB_C19 (x(Sm) 0.99953)
FeSm-02Zin.tdb	977	FE2SM_C15 (x(Sm) 0.33333) + HCP_A3 (x(Sm) 0.99927) + RHOMB_C19 (x(Sm) 0.99953)
FeSm-17Che.tdb	1666.01	FCC_A1 (x(Sm) 1.100e-4) + BCC_A2 (x(Sm) 1.600e-4) + LIQUID (x(Sm) 0.09595)
FeSm-17Che.tdb	1666.01	FCC_A1 (x(Sm) 1.100e-4) + BCC_A2 (x(Sm) 1.600e-4) + LIQUID (x(Sm) 0.09596)
FeSm-17Che.tdb	1666.01	FCC_A1 (x(Sm) 1.100e-4) + BCC_A2 (x(Sm) 1.600e-4) + LIQUID (x(Sm) 0.09594)
FeSm-17Che.tdb	1555.58	FCC_A1 (x(Sm) 9.000e-5) + FE17SM2 (x(Sm) 0.10526) + LIQUID (x(Sm) 0.21737)
FeSm-17Che.tdb	1555.58	FCC_A1 (x(Sm) 9.000e-5) + FE17SM2 (x(Sm) 0.10526) + LIQUID (x(Sm) 0.21712)
FeSm-17Che.tdb	1555.58	FCC_A1 (x(Sm) 9.000e-5) + FE17SM2 (x(Sm) 0.10526) + LIQUID (x(Sm) 0.21719)
FeSm-17Che.tdb	1286.29	FE17SM2 (x(Sm) 0.10526) + FE3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.51577)
FeSm-17Che.tdb	1286.29	FE17SM2 (x(Sm) 0.10526) + FE3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.51565)
FeSm-17Che.tdb	1286.29	FE17SM2 (x(Sm) 0.10526) + FE3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.51589)
FeSm-17Che.tdb	1194.99	LIQUID (x(Sm) 0.91637) + BCC_A2 (x(Sm) 0.99999) + HCP_A3 (x(Sm) 1)
FeSm-17Che.tdb	1194.99	LIQUID (x(Sm) 0.91662) + BCC_A2 (x(Sm) 0.99999) + HCP_A3 (x(Sm) 1)
FeSm-17Che.tdb	1184.83	FCC_A1 (x(Sm) 0) + BCC_A2 (x(Sm) 1.000e-5) + FE17SM2 (x(Sm) 0.10526)
FeSm-17Che.tdb	1173.81	FE3SM (x(Sm) 0.25) + FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.63436)
FeSm-17Che.tdb	1173.81	FE3SM (x(Sm) 0.25) + FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.63417)
FeSm-17Che.tdb	1173.81	FE3SM (x(Sm) 0.25) + FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.63442)
FeSm-17Che.tdb	1006.71	LIQUID (x(Sm) 0.77317) + HCP_A3 (x(Sm) 1) + RHOMB_C19 (x(Sm) 1)
FeSm-17Che.tdb	1006.71	LIQUID (x(Sm) 0.77341) + RHOMB_C19 (x(Sm) 1) + HCP_A3 (x(Sm) 1)
FeSm-17Che.tdb	994.67	FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.76403) + RHOMB_C19 (x(Sm) 1)
FeSm-17Che.tdb	994.67	FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.76414) + RHOMB_C19 (x(Sm) 1)
FeSm-17Che.tdb	994.67	FE2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.76396) + RHOMB_C19 (x(Sm) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull FeSm-02Zin

Invariant reactions (literature)

Invariant reactions reported in the literature for the Fe–Sm system (8)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1558	peritectic: Liquid + f.c.c. Fe -> Fe17Sm2	Liquid: Sm 0.247; f.c.c. Fe: Sm 0; Fe17Sm2: Sm 0.105	unspecified	[1] Zinkevich 2002	Table 6, p. 13, row 2 report
1553	peritectic: Liquid + f.c.c. Fe -> Fe17Sm2	Fe17Sm2: Sm 0.105263	experimental	[1] Zinkevich 2002 cites Buschow 1971 doi	Table 6, p. 13, row 1 report
1287	peritectic: Liquid + Fe17Sm2 -> Fe3Sm	Liquid: Sm 0.544; Fe17Sm2: Sm 0.105; Fe3Sm: Sm 0.25	unspecified	[1] Zinkevich 2002	Table 6, p. 13, row 4 report
1283	peritectic: Liquid + Fe17Sm2 -> Fe3Sm	Fe17Sm2: Sm 0.105263; Fe3Sm: Sm 0.25	experimental	[1] Zinkevich 2002 cites Buschow 1971 doi	Table 6, p. 13, row 3 report
1173	peritectic: Liquid + Fe3Sm -> Fe2Sm	Fe3Sm: Sm 0.25; Fe2Sm: Sm 0.333333	experimental	[1] Zinkevich 2002 cites Buschow 1971 doi	Table 6, p. 13, row 5 report
1172	peritectic: Liquid + Fe3Sm -> Fe2Sm	Liquid: Sm 0.631; Fe3Sm: Sm 0.25; Fe2Sm: Sm 0.333	unspecified	[1] Zinkevich 2002	Table 6, p. 13, row 6 report
997	eutectic: Liquid -> Fe2Sm + α-Sm	Liquid: Sm 0.768; Fe2Sm: Sm 0.333; α-Sm: Sm 1	unspecified	[1] Zinkevich 2002	Table 6, p. 13, row 8 report
993	eutectic: Liquid -> Fe2Sm + α-Sm	Liquid: Sm 0.75; Fe2Sm: Sm 0.333333	experimental	[1] Zinkevich 2002 cites Buschow 1971 doi	Table 6, p. 13, row 7 report

Other properties

Heat capacity / entropy / enthalpy (13)

Heat capacity / entropy / enthalpy, Fe–Sm system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy	35.18 J/mol (basis unstated)/K	298.15	Fe17Sm2 alloy: Sm 0.105263	model	[1] Zinkevich 2002	Table 7, p. 13, row 2 report
Heat capacity	29.1 J/mol (basis unstated)/K	272	Fe17Sm2 alloy: Sm 0.105263	experimental	[1] Zinkevich 2002	Table 7, p. 13, row 3 report
Heat capacity	25.95 J/mol (basis unstated)/K	272	Fe17Sm2 alloy: Sm 0.105263	model	[1] Zinkevich 2002	Table 7, p. 13, row 4 report
Heat capacity	29.4 J/mol (basis unstated)/K	277	Fe17Sm2 alloy: Sm 0.105263	experimental	[1] Zinkevich 2002	Table 7, p. 13, row 5 report
Heat capacity	26.42 J/mol (basis unstated)/K	277	Fe17Sm2 alloy: Sm 0.105263	model	[1] Zinkevich 2002	Table 7, p. 13, row 6 report
Heat capacity	29.7 J/mol (basis unstated)/K	282	Fe17Sm2 alloy: Sm 0.105263	experimental	[1] Zinkevich 2002	Table 7, p. 13, row 7 report
Heat capacity	26.92 J/mol (basis unstated)/K	282	Fe17Sm2 alloy: Sm 0.105263	model	[1] Zinkevich 2002	Table 7, p. 13, row 8 report
Heat capacity	27.45 J/mol (basis unstated)/K	287	Fe17Sm2 alloy: Sm 0.105263	model	[1] Zinkevich 2002	Table 7, p. 13, row 10 report
Heat capacity	29.9 J/mol (basis unstated)/K	287	Fe17Sm2 alloy: Sm 0.105263	experimental	[1] Zinkevich 2002	Table 7, p. 13, row 9 report
Heat capacity	30.2 J/mol (basis unstated)/K	293	Fe17Sm2 alloy: Sm 0.105263	experimental	[1] Zinkevich 2002	Table 7, p. 13, row 11 report
Heat capacity	28 J/mol (basis unstated)/K	293	Fe17Sm2 alloy: Sm 0.105263	model	[1] Zinkevich 2002	Table 7, p. 13, row 12 report
Heat capacity	28.57 J/mol (basis unstated)/K	298.15	Fe17Sm2 alloy: Sm 0.105263	model	[1] Zinkevich 2002	Table 7, p. 13, row 14 report
Heat capacity	30.3 J/mol (basis unstated)/K	298.15	Fe17Sm2 alloy: Sm 0.105263	experimental	[1] Zinkevich 2002	Table 7, p. 13, row 13 report

Sources

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

M. Zinkevich, N. Mattern, A. Handstein, O. Gutfleisch, Thermodynamics of Fe–Sm, Fe–H, and H–Sm systems and its application to the hydrogen–disproportionation–desorption–recombination (HDDR) process for the system Fe17Sm2–H2, Journal of Alloys and Compounds 339, 118-139 (2002). doi:10.1016/s0925-8388(01)01990-9

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}
}