Abstract: | Single crystals of PbRe2O6 were obtained from a stoichiometric mixture of PbO and ReO3 at 500°C. The structure was determined by Patterson methods from X-ray four-circle diffractometer data using 2 270 (392 unique) reflections; RW(F) = 0.036. PbRe2O6 crystallizes in the trigonal space group R3m with a = 10.359(6) Å, c = 11.092(6) Å and Z = 9. The compound is isotypic with the trigonal modification of PbNb2O6 and contains an Re2O10 unit. Unlike other compounds containing this species, there is no metal-metal bonding. |