June 1995 issue
The structures of the two polymorphic forms of K2Ce(NO3)6 are built from discrete irregular [Ce(NO3)6]2− icosahedra. The K atoms ensure the continuity of the structures by ionic contacts.
The triclinic structure of Ba(ReO4)2.H2O closely resembles the pseudomonoclinic space group P2/c pattern with one formula in the asymmetric unit. The BaO10 polyhedron is made up from eight O atoms pertaining to isolated ReO4 tetrahedra and two O atoms from water molecules.
The O atoms in CuFe2(OH)2(AsO4)2 are cubic close packed; between successive layers only alternate octahedral or tetrahedral sites are occupied by Cu[4+2] or Fe and As atoms. Neighbouring sheets of octahedra are linked by bifurcated hydrogen bonds.
Hexaammineruthenium(III) trichloride forms monoclinic crystals containing four inequivalent Ru(NH3)6 fragments. The structure is consistent with the ESR spectrum of the compound.
The refinement of the structure of phosphorus pentoxide at 233 K results in P—O bond lengths and P—O—P bond angles which are in good agreement with those found in other crystalline phosphates. This is in contrast with the results of an earlier study of this compound.