Cover illustration: Diethyl Methano-C60-fullerne-61,61-dicarboxylate Chloroform Solvate at 193 K, C60C(CO2C2H5)2. CHCl3, see Paulus & Bingel, pages 143-146. The displacement ellipsoids are shown at the 50% probability level.
PbSe2O5 forms a three-dimensional network with each diselenite ion bridging five Pb ions and with five diselenite ions grouped around each Pb ion. The coordination around Pb comprises six O atoms forming a dented one-sided octahedron with 2 + 2 O atoms near Pb but with longer Pb-O distances.
LiBrO4.H2ZO, whose found to be isomorphic with NaBrO4.H2O and NaClO4.H2O. Dynamic disordering of the H atoms (detailed by magnetic resonance methods for NaClO4.H2O) is found to be significant in the title salt.