Sc system

42 accepted literature values from 10 paper(s) (experimental 12, model 19, DFT 2, unspecified 9); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	12
model	19
DFT	2
unspecified	9

Accepted values by property group
Property group	Values
invariant reaction	10
phase transition	9
crystal structure	23

Invariant reactions (literature)

Invariant reactions reported in the literature for the Sc system (10)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1814.15	congruent melting: L -> βSc	L: Sc 1; βSc: Sc 1	model	[1] Liu 2008	Table 4, p. 5, row 24 report
1814.15	congruent melting: L -> βSc	L: Sc 1; βSc: Sc 1	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 23 report
1703.15	(βSc) -> (αSc)	(βSc): ; (αSc):	experimental	[2] Qin 2015 cites Eremenko 1988 doi	Table 4, p. 5, row 15 report
1610.15	polymorphic: βSc -> αSc	αSc: Sc 1	model	[3] Murray 1998	Table 1, p. 1, row 11 report
1610.15	polymorphic: βSc -> αSc	αSc:	model	[4] Spear 1990	Table I, p. 1, row 2 report
1610.15	polymorphic: βSc ↔ αSc	αSc: Sc 1	experimental	[1] Liu 2008 cites Okamoto 2000	Table 2, p. 4, row 3 report
1610.15	polymorphic: βSc -> αSc	βSc: Sc 1; αSc: Sc 1	experimental	[1] Liu 2008 cites Okamoto 2000	Table 4, p. 5, row 25 report
1610.15	polymorphic: βSc ↔ αSc	αSc: Sc 1	model	[1] Liu 2008	Table 2, p. 4, row 4 report
1610.15	polymorphic: βSc -> αSc	βSc: Sc 1; αSc: Sc 1	model	[1] Liu 2008	Table 4, p. 5, row 26 report
1608.15	(βSc) -> (αSc)	(βSc): ; (αSc):	model	[2] Qin 2015	Table 4, p. 5, row 16 report

Other properties

Phase transition (9)

Phase transition, Sc system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1607.15 K	1607.15	polymorphic: βSc <-> αSc βSc:	experimental	[5] Wang 2009 cites Beaudry 1963	Table 5, p. 5, row 4 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc -> αSc βSc:	experimental	[6] Liu 2009 cites Okamoto 1991	Table 7, p. 6, row 3 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc -> αSc αSc: Sc 1	model	[6] Liu 2009	Table 3, p. 4, row 5 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc -> αSc βSc:	model	[6] Liu 2009	Table 7, p. 6, row 4 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc -> αSc αSc:	model	[6] Liu 2009	Table 5, p. 5, row 14 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc -> αSc αSc:	experimental	[6] Liu 2009 cites Spear 1990 doi	Table 5, p. 5, row 13 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc -> αSc αSc: Sc 1	experimental	[6] Liu 2009 cites Gschneidner 1983 doi	Table 3, p. 4, row 4 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc <-> αSc βSc:	unspecified	[5] Wang 2009 cites Beaudry 1978	Table 5, p. 5, row 5 report
Phase transition	1610.15 K	1610.15	polymorphic: βSc <-> αSc βSc:	model	[5] Wang 2009	Table 5, p. 5, row 6 report

Crystal structure (23)

Crystal structure, Sc system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	3.3082 Å	0	(αSc) alloy: Sc 1	DFT	[7] Cheng 2012	Table 3, p. 3, row 3 report
Lattice a	3.296 Å	298.15	(αSc) (αSc): Sc 1; (ɑSc): Sc 1	experimental	[8] Cao 2014 cites Semenova 1997 doi	Table 2, p. 3, row 1 report
Lattice a	3.308 Å ± 0.008	298.15	(αSc) alloy: Sc 1	unspecified	[8] Cao 2014 cites Saw 1983 doi	Table 2, p. 3, row 2 report
Lattice a	3.3088 Å	298.15 (<)	(αSc) alloy: Sc 1	model	[9] Chen 2012 cites King 1981 doi	Table 2, p. 2, row 4 report
Lattice a	4.73 Å	298.15	(βSc) (βSc): Sc 1	experimental	[8] Cao 2014 cites Semenova 1997 doi	Table 2, p. 3, row 4 report
Lattice a	3.3088 Å	298.15	αSc αSc: Sc 1	unspecified	[3] Murray 1998	Table 3, p. 1, row 7 report
Lattice a	3.3088 Å	298.15	αSc alloy: Sc 1	model	[10] Hu 2018 cites Villars 1997	Table 1, p. 2, row 2 report
Lattice a	3.3088 Å	298.15	αSc αSc: Sc 1	unspecified	[4] Spear 1990	Table 3, p. 3, row 1 report
Lattice a	4.541 Å	298.15	βSc βSc: Sc 1	unspecified	[4] Spear 1990	Table 3, p. 3, row 2 report
Lattice a	3.73 Å	298.15	βSc alloy: Sc 1	model	[10] Hu 2018 cites Villars 1997	Table 1, p. 2, row 3 report
Lattice a	4.541 Å	298.15	βSc βSc: Sc 1	unspecified	[3] Murray 1998	Table 3, p. 1, row 6 report
Lattice a	3.73 Å	1814 (<)	(βSc) alloy: Sc 1	model	[9] Chen 2012 cites Massalski 1986	Table 2, p. 2, row 5 report
Lattice b	3.3088 Å	298.15	αSc alloy: Sc 1	model	[10] Hu 2018 cites Villars 1997	Table 1, p. 2, row 2 report
Lattice b	3.73 Å	298.15	βSc alloy: Sc 1	model	[10] Hu 2018 cites Villars 1997	Table 1, p. 2, row 3 report
Lattice c	5.1769 Å	0	(αSc) alloy: Sc 1	DFT	[7] Cheng 2012	Table 3, p. 3, row 3 report
Lattice c	5.235 Å	298.15	(αSc) (αSc): Sc 1; (ɑSc): Sc 1	experimental	[8] Cao 2014 cites Semenova 1997 doi	Table 2, p. 3, row 1 report
Lattice c	5.268 Å	298.15	(αSc) alloy: Sc 1	unspecified	[8] Cao 2014 cites Saw 1983 doi	Table 2, p. 3, row 2 report
Lattice c	5.268 Å	298.15 (<)	(αSc) alloy: Sc 1	model	[9] Chen 2012 cites King 1981 doi	Table 2, p. 2, row 4 report
Lattice c	3.18 Å	298.15	(βSc) (βSc): Sc 1	experimental	[8] Cao 2014 cites Semenova 1997 doi	Table 2, p. 3, row 4 report
Lattice c	5.268 Å	298.15	αSc αSc: Sc 1	unspecified	[3] Murray 1998	Table 3, p. 1, row 7 report
Lattice c	5.268 Å	298.15	αSc alloy: Sc 1	model	[10] Hu 2018 cites Villars 1997	Table 1, p. 2, row 2 report
Lattice c	5.268 Å	298.15	αSc αSc: Sc 1	unspecified	[4] Spear 1990	Table 3, p. 3, row 1 report
Lattice c	3.73 Å	298.15	βSc alloy: Sc 1	model	[10] Hu 2018 cites Villars 1997	Table 1, p. 2, row 3 report

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
Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). doi:10.1007/s10973-014-4216-2
J. L. Murray, The Al-Sc (aluminum-scandium) system, JPE 19, 380-384 (1998). doi:10.1361/105497198770342120
K. E. Spear, P. K. Liao, The B-Sc (Boron-Scandium) system, Bulletin of Alloy Phase Diagrams 11, 321-324 (1990). doi:10.1007/bf02843307
S.L. Wang, C.P. Wang, X.J. Liu, K. Ishida, Thermodynamic assessments of the Ag–Y and Sc–Y systems, Journal of Alloys and Compounds 476, 187-192 (2009). doi:10.1016/j.jallcom.2008.09.053
X.J. Liu, S.L. Wang, C.P. Wang, Thermodynamic assessments of the Sc–M (M: Ag, B and Th) systems, Journal of Alloys and Compounds 469, 186-192 (2009). doi:10.1016/j.jallcom.2008.02.018
Kaiming Cheng, Biao Hu, Yong Du, Honghui Xu, Qiannan Gao, Thermodynamic modeling of the Ge–Sc system supported by key experiments and first-principles calculation, Calphad 37, 18-24 (2012). doi:10.1016/j.calphad.2011.12.010
Zhaoping Cao, Shuhong Liu, Xu Fang, Kaiming Cheng, Qiannan Gao, Yong Du et al., Experimental investigation and thermodynamic analysis of the Sc–Ni system supplemented with first-principles calculations, Thermochimica Acta 586, 30-39 (2014). doi:10.1016/j.tca.2014.04.006
Chong Chen, Man Wang, Yong Du, Qiannan Gao, Biao Hu, Shuhong Liu, Thermodynamic modeling of the Sr–X (X=H, Li, Na, Sc) systems, Calphad 38, 17-22 (2012). doi:10.1016/j.calphad.2012.03.001
J.L. Hu, H. Bo, L.B. Liu, Z.P. Jin, Thermodynamic study of the Al-Sc-Y system, Thermochimica Acta 661, 147-159 (2018). doi:10.1016/j.tca.2018.01.018

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 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_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}
}