Three different mixed Cu(i)–Cu(ii) Pb selenite chlorides obtained using chemical vapor transport reactions are based up metal-oxide selenite honeycomb layers.

Cu 3 (SeO 4 ) 2 (SeO 3 OH) 2 (H 2 O) 16 (1) is a novel copper selenate hydrate and the first inorganic compound to contain linear octahedral-tetrahedral heptamers. The heptamers are formed by successive polymerization of two SeO 3 OH tetrahedra, two SeO 4 tetrahedra, and three Cu(H 2 O) 4 O 2 octahedra.

Cu 3(SeO4)2(SeO3OH)2(H2O)16 -The First Example of a Linear Octahedral--Tetrahedral Heptamer in InorganicCompounds. -Single crystals of the new copper selenate Cu 3(SeO4)2(SeO3OH) 2(H2O)16 are obtained by hydrothermal reaction of an aqueous solution of (UO2)NO3, Cu(NO3)2, and H2SeO4 (autoclave, 180 C, 72 h) followed by slow solvent evaporation. The compound crystallizes in the triclinin space group P1 with Z = 1. The title heptamers are formed by successive polymerization of two SeO 3OH tetrahedra, two SeO4 tetrahedra, and three Cu(H2O)4O2 octahedra. The octahedra and tetrahedra are linked in trans-configuration which is in agreement with the Jahn-Teller distortion of the octahedral coordination geometry of Cu 2+ . -(GURZHIY, V. V.; AL-SHURAY, A.; BRITVIN, S. N.; KRIVOVICHEV*, S. V.; Eur. J. Inorg. Chem. 2015, 32, 5311-5313, http://dx.