July 2000 issue
The single-crystal structure of the title compound shows the anion to have the Anderson structure based on six WO6 octahedral edge-sharing units surrounding a central MnO6 octahedron. Varying interactions from the O atoms of the MnO6 octahedron to surrounding water molecules result in differences in the Mn—O distances.
Precise X-ray structural determinations of two Cr3+ α-alums are presented, each at 293 and at 12 K.
The structure of dipotassium titanium trisilicate hydrate has been refined and the hydrogen-bonding geometry elucidated. The structure is a three-dimensional mixed framework with channels formed by six- and eight-membered rings. K+ ions and water molecules are located in the channels.
This new organic zincoarsenate is built up from a two-dimensional framework of ZnO5 and ZnO6 polyhedra, and AsO4 tetrahedra. Trigonally coordinated O atoms are present in these layers. The organic cations are inserted between the inorganic sheets.