CRYSTAL-STRUCTURE OF STRONTIUM PERRHENATE SESQUIHYDRATE SR(REO4)2-CENTER-DOT-1,5H2O

Single crystals of Se(ReO4)2.1.5H2O were prepared at room temperature from an aqueous solution of Sr(ReO4)2. The structure has been studied by X-ray diffractometry and was refined to the R and R(w) values of 0. 00 and 0.118 respectively. The salt crystallizes in monoclinic symmetr y belonging to the space group P2(1)/n the lattice constants a = 13.20 7 angstrom, b = 10.028 angstrom, c = 13.538 angstrom and beta = 92.3-d egrees; Z = 8). The three-dimensional network is formed by ReO4 tetrah edra and SrO9 polyhedra connected by their corners. The water molecule s are coordinated exclusively with Sr2+. Structure relations with othe r perrhenates are discussed.