Fe–Sc system

20 accepted literature values from 1 paper(s) (experimental 9, model 11); 3 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (10) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	9
model	11

Accepted values by property group
Property group	Values
invariant reaction	19
phase transition	1

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
FeSc-08GTT.tdb	GTT, unpublished, 2008.	`03241f90e3714bbbe6cd11076ff31117c4582a7f7faa5e4366b1e2dc23951df1`	viewer · TDB · JSON
FeSc-08Liu.tdb	X.J. Liu, P. Yu, C.P. Wang, K. Ishida, J. Alloys Compd., 466, 169-75(2008). doi:10.1016/j.jallcom.2007.11.069	`f94a03a213b6b09e3c16e670921e05c519a338e59ea32186af6175215195b7e1`	viewer · TDB · JSON
FeSc-16Xu.tdb	K. Xu, S. Liu, F. Zhang, Y. Du, Z. Jin, Calphad, 54, 158-64(2016). doi:10.1016/j.calphad.2016.07.002	`c17fcad5d8cfa739c426becf49819462b986ee56892228f9e932da3438d3cfba`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FeSc-08GTT.tdb	1649.67	FCC_A1 (x(Sc) 0.00812) + BCC_A2 (x(Sc) 0.00864) + LIQUID (x(Sc) 0.07193)
FeSc-08GTT.tdb	1583.16	LIQUID (x(Sc) 0.88241) + BCC_A2 (x(Sc) 0.99454) + HCP_A3 (x(Sc) 0.99926)
FeSc-08GTT.tdb	1559.73	FCC_A1 (x(Sc) 0.01552) + LIQUID (x(Sc) 0.10827) + FE2SC_LAVES (x(Sc) 0.33333)
FeSc-08GTT.tdb	1559.73	FCC_A1 (x(Sc) 0.0155) + LIQUID (x(Sc) 0.1082) + FE2SC_LAVES (x(Sc) 0.33333)
FeSc-08GTT.tdb	1239.52	FE2SC_LAVES (x(Sc) 0.33333) + LIQUID (x(Sc) 0.74887) + HCP_A3 (x(Sc) 0.99922)
FeSc-08GTT.tdb	1239.52	FE2SC_LAVES (x(Sc) 0.33333) + LIQUID (x(Sc) 0.74889) + HCP_A3 (x(Sc) 0.99922)
FeSc-08GTT.tdb	1181.5	BCC_A2 (x(Sc) 0.00246) + FCC_A1 (x(Sc) 0.00276) + FE2SC_LAVES (x(Sc) 0.33333)
FeSc-08GTT.tdb	1181.49	BCC_A2 (x(Sc) 0.00241) + FCC_A1 (x(Sc) 0.00271) + FE2SC_LAVES (x(Sc) 0.33333)
FeSc-08GTT.tdb	1141.94	FE2SC_LAVES (x(Sc) 0.33333) + FESC7 (x(Sc) 0.875) + HCP_A3 (x(Sc) 0.99958)
FeSc-08GTT.tdb	1141.94	FE2SC_LAVES (x(Sc) 0.33333) + FESC7 (x(Sc) 0.875) + HCP_A3 (x(Sc) 0.99958)
FeSc-08GTT.tdb	1141.94	FE2SC_LAVES (x(Sc) 0.33333) + FESC7 (x(Sc) 0.875) + HCP_A3 (x(Sc) 0.99958)
FeSc-08Liu.tdb	1806	FE2SC_C36 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.42608)
FeSc-08Liu.tdb	1805.99	FE2SC_C36 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.42681)
FeSc-08Liu.tdb	1805.99	FE2SC_C36 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.42673)
FeSc-08Liu.tdb	1654.74	FCC_A1 (x(Sc) 0.01019) + BCC_A2 (x(Sc) 0.01039) + LIQUID (x(Sc) 0.06126)
FeSc-08Liu.tdb	1552.53	LIQUID (x(Sc) 0.87057) + BCC_A2 (x(Sc) 0.98667) + HCP_A3 (x(Sc) 0.99729)
FeSc-08Liu.tdb	1545.49	FCC_A1 (x(Sc) 0.02806) + LIQUID (x(Sc) 0.10017) + FE2SC_C36 (x(Sc) 0.33)
FeSc-08Liu.tdb	1545.49	FCC_A1 (x(Sc) 0.02802) + LIQUID (x(Sc) 0.1001) + FE2SC_C36 (x(Sc) 0.33)
FeSc-08Liu.tdb	1520.72	FE2SC_C36 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.63496)
FeSc-08Liu.tdb	1520.72	FE2SC_C36 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.63485)
FeSc-08Liu.tdb	1474.72	FCC_A1 (x(Sc) 0.02306) + FE2SC_C14 (x(Sc) 0.33) + FE2SC_C36 (x(Sc) 0.33)
FeSc-08Liu.tdb	1474.72	FCC_A1 (x(Sc) 0.02303) + FE2SC_C36 (x(Sc) 0.33) + FE2SC_C14 (x(Sc) 0.33)
FeSc-08Liu.tdb	1474.72	FE2SC_C14 (x(Sc) 0.33) + FE2SC_C36 (x(Sc) 0.33) + LIQUID (x(Sc) 0.65051)
FeSc-08Liu.tdb	1474.72	FE2SC_C36 (x(Sc) 0.33) + FE2SC_C14 (x(Sc) 0.33) + LIQUID (x(Sc) 0.65061)
FeSc-08Liu.tdb	1240.46	FE2SC_C14 (x(Sc) 0.33) + LIQUID (x(Sc) 0.75349) + HCP_A3 (x(Sc) 0.99466)
FeSc-08Liu.tdb	1240.46	FE2SC_C14 (x(Sc) 0.33) + LIQUID (x(Sc) 0.75351) + HCP_A3 (x(Sc) 0.99466)
FeSc-08Liu.tdb	1205.94	FCC_A1 (x(Sc) 0.0048) + BCC_A2 (x(Sc) 0.00627) + FE2SC_C14 (x(Sc) 0.33)
FeSc-08Liu.tdb	1205.94	FCC_A1 (x(Sc) 0.00477) + BCC_A2 (x(Sc) 0.00624) + FE2SC_C14 (x(Sc) 0.33)
FeSc-08Liu.tdb	1161.8	FE2SC_C14 (x(Sc) 0.33) + FE6SC29 (x(Sc) 0.82857) + HCP_A3 (x(Sc) 0.99646)
FeSc-08Liu.tdb	1161.8	FE2SC_C14 (x(Sc) 0.33) + FE6SC29 (x(Sc) 0.82857) + HCP_A3 (x(Sc) 0.99646)
FeSc-08Liu.tdb	1161.8	FE2SC_C14 (x(Sc) 0.33) + FE6SC29 (x(Sc) 0.82857) + HCP_A3 (x(Sc) 0.99646)
FeSc-16Xu.tdb	1808.11	FE2SC_C14 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.40651)
FeSc-16Xu.tdb	1808.11	FE2SC_C14 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.40598)
FeSc-16Xu.tdb	1808.1	FE2SC_C14 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.4062)
FeSc-16Xu.tdb	1653.45	FCC_A1 (x(Sc) 0.01069) + BCC_A2 (x(Sc) 0.01093) + LIQUID (x(Sc) 0.06718)
FeSc-16Xu.tdb	1556.35	FE2SC_C14 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.58532)
FeSc-16Xu.tdb	1556.35	FE2SC_C14 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.58544)
FeSc-16Xu.tdb	1556.35	FE2SC_C14 (x(Sc) 0.33) + FE2SC_C15 (x(Sc) 0.36) + LIQUID (x(Sc) 0.58549)
FeSc-16Xu.tdb	1553.7	FCC_A1 (x(Sc) 0.02586) + LIQUID (x(Sc) 0.1042) + FE2SC_C14 (x(Sc) 0.33)
FeSc-16Xu.tdb	1553.7	FCC_A1 (x(Sc) 0.02583) + LIQUID (x(Sc) 0.10414) + FE2SC_C14 (x(Sc) 0.33)
FeSc-16Xu.tdb	1544.28	LIQUID (x(Sc) 0.85332) + BCC_A2 (x(Sc) 0.98552) + HCP_A3 (x(Sc) 0.99761)
FeSc-16Xu.tdb	1248.47	FE2SC_C14 (x(Sc) 0.33) + LIQUID (x(Sc) 0.73651) + HCP_A3 (x(Sc) 0.9947)
FeSc-16Xu.tdb	1248.47	FE2SC_C14 (x(Sc) 0.33) + LIQUID (x(Sc) 0.7366) + HCP_A3 (x(Sc) 0.99471)
FeSc-16Xu.tdb	1207.99	FCC_A1 (x(Sc) 0.00592) + BCC_A2 (x(Sc) 0.00746) + FE2SC_C14 (x(Sc) 0.33)
FeSc-16Xu.tdb	1207.99	FCC_A1 (x(Sc) 0.0059) + BCC_A2 (x(Sc) 0.00744) + FE2SC_C14 (x(Sc) 0.33)
FeSc-16Xu.tdb	1161.12	FE2SC_C14 (x(Sc) 0.33) + FE6SC29 (x(Sc) 0.83) + HCP_A3 (x(Sc) 0.99663)
FeSc-16Xu.tdb	1161.12	FE2SC_C14 (x(Sc) 0.33) + FE6SC29 (x(Sc) 0.83) + HCP_A3 (x(Sc) 0.99663)
FeSc-16Xu.tdb	1161.12	FE2SC_C14 (x(Sc) 0.33) + FE6SC29 (x(Sc) 0.83) + HCP_A3 (x(Sc) 0.99664)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull FeSc-08GTT · CALPHAD hull FeSc-08Liu

Invariant reactions (literature)

Invariant reactions reported in the literature for the Fe–Sc system (19)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1838.15	congruent melting: L -> βFe2Sc	L: Sc 0.333; βFe2Sc: Sc 0.333	model	[1] Liu 2008	Table 4, p. 5, row 14 report
1838.15	congruent melting: L -> βFe2Sc	L: Sc 0.333; βFe2Sc: Sc 0.333	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 13 report
1811.15	congruent melting: L -> δFe	L: Sc 0; δFe: Sc 0	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 1 report
1811.15	congruent melting: L -> δFe	L: Sc 0; δFe: Sc 0	model	[1] Liu 2008	Table 4, p. 5, row 2 report
1798.15	peritectic: L + βFe2Sc -> λFe2Sc	βFe2Sc: Sc 0.333; λFe2Sc: Sc 0.357	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 17 report
1798.15	peritectic: L + βFe2Sc -> λFe2Sc	L: Sc 0.442; βFe2Sc: Sc 0.333; λFe2Sc: Sc 0.357	model	[1] Liu 2008	Table 4, p. 5, row 18 report
1653.15	peritectic: δFe -> γFe + L	δFe: Sc 0.012; γFe: Sc 0.013; L: Sc 0.065	model	[1] Liu 2008	Table 4, p. 5, row 6 report
1653.15	peritectic: δFe -> γFe + L		experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 5 report
1553.15	eutectic: L -> (γFe) + βFe2Sc	L: Sc 0.102; (γFe): Sc 0.03; βFe2Sc: Sc 0.333	model	[1] Liu 2008	Table 4, p. 5, row 12 report
1553.15	eutectic: L -> (γFe) + βFe2Sc	L: Sc 0.115; βFe2Sc: Sc 0.333	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 11 report
1544.15	peritectic: βSc -> L + αSc	βSc: Sc 0.985; L: Sc 0.859; αSc: Sc 0.997	model	[1] Liu 2008	Table 4, p. 5, row 28 report
1473.15	polymorphic: βFe2Sc -> αFe2Sc	βFe2Sc: Sc 0.333; αFe2Sc: Sc 0.333	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 15 report
1473.15	polymorphic: βFe2Sc -> αFe2Sc	βFe2Sc: Sc 0.333; αFe2Sc: Sc 0.333	model	[1] Liu 2008	Table 4, p. 5, row 16 report
1248.15	eutectic: L -> αFe2Sc + αSc	L: Sc 0.751; αFe2Sc: Sc 0.333; αSc: Sc 0.995	model	[1] Liu 2008	Table 4, p. 5, row 20 report
1248.15	eutectic: L -> αFe2Sc + αSc	L: Sc 0.74; αFe2Sc: Sc 0.333	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 19 report
1208.15	peritectoid: γFe + αFe2Sc -> αFe	γFe: Sc 0.005; αFe2Sc: Sc 0.333; αFe: Sc 0.007	model	[1] Liu 2008	Table 4, p. 5, row 10 report
1208.15	peritectoid: γFe + αFe2Sc -> αFe	αFe2Sc: Sc 0.333	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 9 report
1138.15	peritectoid: αFe2Sc + αSc -> Fe6Sc29	αFe2Sc: Sc 0.333; Fe6Sc29: Sc 0.875	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 21 report
1138.15	peritectoid: αFe2Sc + αSc -> Fe6Sc29	αFe2Sc: Sc 0.333; αSc: Sc 0.997; Fe6Sc29: Sc 0.829	model	[1] Liu 2008	Table 4, p. 5, row 22 report

Other properties

Phase transition (1)

Phase transition, Fe–Sc system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	542.15 K	542.15	magnetic	model	[1] Liu 2008 cites Ikeda 1974 doi	p. 2 report	Moreover, the Curie temperature of the ␣Fe2 Sc phase was reported to be 269 ◦ C [16].

Sources

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

X.J. Liu, P. Yu, C.P. Wang, K. Ishida, Thermodynamic evaluation of the Co–Sc and Fe–Sc systems, Journal of Alloys and Compounds 466, 169-175 (2008). doi:10.1016/j.jallcom.2007.11.069

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}
}