Scandium perrhenate is an inorganic compound, with the chemical formula Sc(ReO4)3. Its thermal stability is lower than that of the corresponding compounds of the yttrium and lanthanum perrhenates.Ovchinnikov, K. V.; Nikolaev, E. N.; Semenov, G. A. Mass-spectrometric study of the in vacuo thermal decomposition of scandium, yttrium, and lanthanum perrhenates. Zhurnal Obshchei Khimii, 1983. 53 (5): 966-968. ISSN: 0044-460X.
Preparation and properties
Scandium perrhenate can be obtained by reacting perrhenic acid with scandium oxide.Yi, Xianwu; et al. Series of Inorganic Chemistry - Vol 7. Scandium; Rare Earth Elements. Science Press. pp. 57. 3.9.6 Manganates and Rhenates of Scandium. (in Chinese) From the solution, the trihydrate of scandium perrhenate can be precipitated, which loses water at 50 °C to obtain Sc(ReO4)3·H2O, and obtains the anhydrous form at 140 °C. Scandium oxide and rhenium(VII) oxide are formed at 550 °C.Komissarova, L. N.; Varfolomeev, M. B.; Ivanov, V. I.; Plyushchev, V. E. Preparation and properties of scandium perrhenates. Doklady Akademii Nauk SSSR, 1965. 160 (3): 608-611. .
Scandium perrhenate trihydrate is a crystal in the triclinic crystal system, with space group P, a=7.333, b=7.985, c=20.825 Å; α=93.35, β=92.20, γ=97.42°.Khrustalev, V. N.; Varkholomeev, M. B.; Struchkov, Yu. T. Crystal structure of scandium perrhenate trihydrate. Zhurnal Neorganicheskoi Khimii, 1997. 42 (11): 1779-1784. .
Scandium perrhenate can crystallize with ammonium perrhenate in water to form NH4Sc(ReO4)4·4H2O.Khrustalev, V. N.; Varfolomeev, M. B.; Shamrai, N. B.; Struchkov, Yu. T. Synthesis and crystal structure of double ammonium indium and ammonium scandium perrhenate tetrahydrates. Zhurnal Neorganicheskoi Khimii, 1996. 41 (4): 549-553. .
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