Synthesis and Structure of the Double Oxide Pb6Re6O19

Pb₆Re₆O₁₉ oxide has been synthesized in a sealed evacuted silica tube and by high-pressure high-temperature technique. Its crystal structure, refined from X-ray powder data (a = 9.3162(1) Å, space group Pn3, R_I = 0.021, R_p = 0.067), is based on a three-dimensional network of Re₂O₁₀ groups linked together by corner sharing. The short Re–Re separation inside the Re₂O₁₀ groups (2.45 Å) indicates the presence of a metal-metal bonding.