Crystal Structure of α-K3H4[SiW9Al3(H2O)3O37]·7H2O

Abstract

Abstract: The title complex was obtained from α-SiW₉. The crystal structure determination shows that the complex crystallizes in the monoclinic space group P2₁/α with α= 1. 0996 nm, b=3. 9181nm, c=1. 1987 nm, β= 114. 30°, D_c= 3. 60 g/cm³, Z=4, the final R= 0.081, and the SiW₉O₃₄in the complex is A-αa-type tri-lacuna heteropoly anion. Three Al atoms fill into the lacunas linking each other by sharing a corner of the octahedra AlO₅(H₂O) and with three W₂O₁₀by sharing a edge of octahedra, completing a pseudo-Keggin unit. K⁺ions and crystal water molecules lie in between the anions.

Key words: Potassium aluminotungstosilicate, Trisubstituted heteropoly complex, Crystal structure, Isomer

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Qu Lun-yu, Chen Ya-guang, Peng Jun, Lin Yong-hua, Yu Zuo-long. Crystal Structure of α-K₃H₄[SiW₉Al₃(H₂O)₃O₃₇]·7H₂O[J]. Chem. J. Chinese Universities, 1991, 12(8): 1009.

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Crystal Structure of α-K₃H₄[SiW₉Al₃(H₂O)₃O₃₇]·7H₂O

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