Sc–Sn system

28 accepted literature values from 1 paper(s) (experimental 17, model 5, unspecified 6); 1 calculated phase diagram(s). 13 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 (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	17
model	5
unspecified	6

Accepted values by property group
Property group	Values
invariant reaction	13
phase transition	5
formation	10

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
ScSn-13Idd.tdb	A. Iddaoudi, N. Selhaoi, M. Ait Amar, S. Kardellass, R. Karioui, L. Bouirden, Calphad, 41, 71-75(2013). doi:10.1016/j.calphad.2013.01.006	`a0ba1a0cb0016f10cc30d7b3693d56879ea52f2d3a6d9d6fc7800a376a3a155f`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
ScSn-13Idd.tdb	1916.67	SC5SN3_D88 (x(Sn) 0.375) + SC5SN3_HT (x(Sn) 0.375) + LIQUID (x(Sn) 0.47634)
ScSn-13Idd.tdb	1916.67	LIQUID (x(Sn) 0.26604) + SC5SN3_D88 (x(Sn) 0.375) + SC5SN3_HT (x(Sn) 0.375)
ScSn-13Idd.tdb	1643.94	SC5SN3_D88 (x(Sn) 0.375) + SC6SN5 (x(Sn) 0.45455) + LIQUID (x(Sn) 0.54961)
ScSn-13Idd.tdb	1643.94	SC5SN3_D88 (x(Sn) 0.375) + SC6SN5 (x(Sn) 0.45455) + LIQUID (x(Sn) 0.54952)
ScSn-13Idd.tdb	1542.97	BCC_A2 (x(Sn) 0.06751) + LIQUID (x(Sn) 0.15374) + SC5SN3_D88 (x(Sn) 0.375)
ScSn-13Idd.tdb	1443.01	HCP_A3 (x(Sn) 0.04683) + BCC_A2 (x(Sn) 0.06017) + SC5SN3_D88 (x(Sn) 0.375)
ScSn-13Idd.tdb	1225.79	SC6SN5 (x(Sn) 0.45455) + SC11SN10 (x(Sn) 0.47619) + LIQUID (x(Sn) 0.67183)
ScSn-13Idd.tdb	1225.79	SC6SN5 (x(Sn) 0.45455) + SC11SN10 (x(Sn) 0.47619) + LIQUID (x(Sn) 0.67178)
ScSn-13Idd.tdb	1225.79	SC6SN5 (x(Sn) 0.45455) + SC11SN10 (x(Sn) 0.47619) + LIQUID (x(Sn) 0.67189)
ScSn-13Idd.tdb	1146.67	SC11SN10 (x(Sn) 0.47619) + SCSN2 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.69336)
ScSn-13Idd.tdb	1146.67	SC11SN10 (x(Sn) 0.47619) + SCSN2 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.69307)
ScSn-13Idd.tdb	1146.67	SC11SN10 (x(Sn) 0.47619) + SCSN2 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.69341)
ScSn-13Idd.tdb	504.71	SCSN2 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99877) + BCT_A5 (x(Sn) 1)
ScSn-13Idd.tdb	504.71	SCSN2 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99877) + BCT_A5 (x(Sn) 1)
ScSn-13Idd.tdb	504.71	SCSN2 (x(Sn) 0.66667) + LIQUID (x(Sn) 0.99877) + BCT_A5 (x(Sn) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Sc–Sn system (13)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1728	Liq + Sc6Sn5 <-> α-Sc5Sn3	Sc6Sn5: Sn 0.454545; α-Sc5Sn3: Sn 0.375	experimental	[1] Iddaoudi 2013 cites Palenzona 1995 doi	Table 3, p. 3, row 9 report
1645	Liq + Sc6Sn5 <-> α-Sc5Sn3	Sc6Sn5: Sn 0.454545; α-Sc5Sn3: Sn 0.375	experimental	[1] Iddaoudi 2013	Table 3, p. 3, row 11 report
1643	Liq + Sc6Sn5 <-> α-Sc5Sn3	Sc6Sn5: Sn 0.454545; α-Sc5Sn3: Sn 0.375	unspecified	[1] Iddaoudi 2013 cites Podarevskaya 2005 doi	Table 3, p. 3, row 10 report
1543	Liq <-> Sc + α-Sc5Sn3	α-Sc5Sn3: Sn 0.375	unspecified	[1] Iddaoudi 2013 cites Podarevskaya 2005 doi	Table 3, p. 3, row 17 report
1543	Liq <-> Sc + α-Sc5Sn3	α-Sc5Sn3: Sn 0.375	experimental	[1] Iddaoudi 2013	Table 3, p. 3, row 18 report
1238	Liq + Sc11Sn10 <-> Sc6Sn5	Sc11Sn10: Sn 0.47619; Sc6Sn5: Sn 0.454545	unspecified	[1] Iddaoudi 2013 cites Podarevskaya 2005 doi	Table 3, p. 3, row 7 report
1238	Liq + Sc11Sn10 <-> Sc6Sn5	Sc11Sn10: Sn 0.47619; Sc6Sn5: Sn 0.454545	experimental	[1] Iddaoudi 2013	Table 3, p. 3, row 8 report
1218	Liq + Sc11Sn10 <-> Sc6Sn5	Sc11Sn10: Sn 0.47619; Sc6Sn5: Sn 0.454545	experimental	[1] Iddaoudi 2013 cites Palenzona 1995 doi	Table 3, p. 3, row 6 report
1163	Liq + ScSn2 <-> Sc11Sn10	ScSn2: Sn 0.666667; Sc11Sn10: Sn 0.47619	experimental	[1] Iddaoudi 2013 cites Palenzona 1995 doi	Table 3, p. 3, row 3 report
1148	Liq + ScSn2 <-> Sc11Sn10	ScSn2: Sn 0.666667; Sc11Sn10: Sn 0.47619	unspecified	[1] Iddaoudi 2013 cites Podarevskaya 2005 doi	Table 3, p. 3, row 4 report
1147	Liq + ScSn2 <-> Sc11Sn10	ScSn2: Sn 0.666667; Sc11Sn10: Sn 0.47619	experimental	[1] Iddaoudi 2013	Table 3, p. 3, row 5 report
504.7	Liq <-> Sn + ScSn2	Sn: Sn 1; ScSn2: Sn 0.666667	experimental	[1] Iddaoudi 2013	Table 3, p. 3, row 2 report
498	Liq <-> Sn + ScSn2	Sn: Sn 1; ScSn2: Sn 0.666667	experimental	[1] Iddaoudi 2013 cites Palenzona 1995 doi	Table 3, p. 3, row 1 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, Sc–Sn system (10)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Sc11Sn10		-52.72 kJ/mol-atom		model			[1] Iddaoudi 2013	Table 4, p. 4, row 3 report
Sc11Sn10		-49.3 kJ/mol-atom ± 1.5	298.15	experimental			[1] Iddaoudi 2013 cites Podarevskaya 1992	Table 4, p. 4, row 4 report
Sc6Sn5	Sc6Sn5	-53.661 kJ/mol-atom		model	-64.306 (mp-aaacqumy)		[1] Iddaoudi 2013	Table 4, p. 4, row 5 report
Sc6Sn5	Sc6Sn5	-51.5 kJ/mol-atom ± 1.4	298.15	experimental	-64.306 (mp-aaacqumy)		[1] Iddaoudi 2013 cites Podarevskaya 1992	Table 4, p. 4, row 6 report
ScSn2	ScSn2	-48.9 kJ/mol-atom ± 5.7	298.15	experimental	-45.195 (mp-aaaaadog)	-51.348 (oqmd-18467)	[1] Iddaoudi 2013 cites Lebedev 1989	Table 4, p. 4, row 2 report
ScSn2	ScSn2	-44.922 kJ/mol-atom		model	-45.195 (mp-aaaaadog)	-51.348 (oqmd-18467)	[1] Iddaoudi 2013	Table 4, p. 4, row 1 report
α-Sc5Sn3	Sc5Sn3	-70.2 kJ/mol-atom ± 1.8	298.15	experimental	-65.964 (mp-aaaabaep)	-69.463 (oqmd-31054)	[1] Iddaoudi 2013 cites Meschel 1996 doi	Table 4, p. 4, row 9 report
α-Sc5Sn3	Sc5Sn3	-56.02 kJ/mol-atom		model	-65.964 (mp-aaaabaep)	-69.463 (oqmd-31054)	[1] Iddaoudi 2013	Table 4, p. 4, row 7 report
α-Sc5Sn3	Sc5Sn3	-55.2 kJ/mol-atom ± 1.2	298.15	experimental	-65.964 (mp-aaaabaep)	-69.463 (oqmd-31054)	[1] Iddaoudi 2013 cites Podarevskaya 1992	Table 4, p. 4, row 8 report
β-Sc5Sn3	Sc5Sn3	-55.997 kJ/mol-atom		model	-65.964 (mp-aaaabaep)	-69.463 (oqmd-31054)	[1] Iddaoudi 2013	Table 4, p. 4, row 10 report

Other properties

Phase transition (5)

Phase transition, Sc–Sn system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1988 K	1988	α-Sc5Sn3 <-> β-Sc5Sn3 α-Sc5Sn3: Sn 0.375; β-Sc5Sn3: Sn 0.375	experimental	[1] Iddaoudi 2013	Table 3, p. 3, row 13 report
Phase transition	1988 K	1988	α-Sc5Sn3 <-> β-Sc5Sn3 α-Sc5Sn3: Sn 0.375; β-Sc5Sn3: Sn 0.375	unspecified	[1] Iddaoudi 2013 cites Podarevskaya 2005 doi	Table 3, p. 3, row 12 report
Phase transition	2070 K	2070	Liq <-> β-Sc5Sn3 Liq: Sn 0.375; β-Sc5Sn3: Sn 0.375	experimental	[1] Iddaoudi 2013	Table 3, p. 3, row 16 report
Phase transition	2073 K	2073	Liq <-> β-Sc5Sn3 Liq: Sn 0.375; β-Sc5Sn3: Sn 0.375	experimental	[1] Iddaoudi 2013 cites Palenzona 1995 doi	Table 3, p. 3, row 14 report
Phase transition	2073 K	2073	Liq <-> β-Sc5Sn3 Liq: Sn 0.375; β-Sc5Sn3: Sn 0.375	unspecified	[1] Iddaoudi 2013 cites Podarevskaya 2005 doi	Table 3, p. 3, row 15 report

Sources

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

A. Iddaoudi, N. Selhaoui, M. Ait Amar, S. Kardellass, R. Karioui, L. Bouirden, Thermodynamic assessment of the Sc–Sn system, Calphad 41, 71-75 (2013). doi:10.1016/j.calphad.2013.01.006

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}
}