Cover illustration: A Tetrameric Macrocycle with 2,5-Dithio-1,3,4-thiadiazole Subunits, see
Rugutt, Fronczek, Watkins & Pappalardo, pages 81-84. Displacement ellipsoids are plotted at the 75% probability level. S atoms are shown in yellow, N atoms are shown in blue, O atoms are shown in red and C atoms are shown in green.
The structure of K3Al2As1.92P1.08O12, prepared by solid-state reaction, contains AlO4 and (As,P)O4 tetrahedra which share corners to form a three-dimensional framework. The structure is related to those of the compounds MIMIIXO4 and tridymite.
The structure of NaInAs2O7, prepared by solid-state reaction, contains InO6 octahedra and As2O7 diarsenate groups. These are linked by In—O—As bridges to form a three-dimensional framework containing cages within which the Na+ ions are located.
The structure of (NH4)4(H6ZnMo6O24).6H2O is composed of (H6ZnMo6O24)4− anions, NH4+ cations and water molecules linked by hydrogen bonds. The anion is formed from six edge-sharing octahedral MoO6 units surrounding a central ZnO6 octahedron with all metal ions lying in a common plane.
Os3Sn15O14 is a metal-rich stannate containing Os-centered Sn6 octahedra. The OsSn6 units are linked to form triple chains in which the oxidation state of the linking Sn atoms is +1 and the oxidation state of the terminal Sn atoms is +2.
K2MgWO2(PO4)2 undergoes at least five phase transitions between room temperature and its melting point. The structure of the room-temperature form is triclinic pseudo-tetragonal (space group P1) and is composed of chains of alternately corner-linked [WO6] and [MgO6] octahedra connected via [PO4] tetrahedra.