June 1996 issue
The composition of Sr(ReO4)2.2H2O has been reconfirmed as the dihydrate. The structure contains trigonal bipyramidal disordered ReO4 groups with two partially occupied
Mg2As2O7.2H2O and Zn2As2O7.2H2O have been prepared by hydrothermal methods. They are isotypic and have a framework structure characterized by zigzag infinite chains of edge-sharing MO6 octahedra linked by As2O7 groups to form a three-dimensional structure containing intersecting tunnels.
In Bi7.5Y0.5O12 and Bi7.68Ti0.32O12.16, Y and Ti atoms replace Bi atoms in the β-Bi2O3 structure and additional O atoms are incorporated. This causes local disorder and irregular displacements of all the atoms.