Abstract
AbstractReV2O3(P2O7) was obtained in chemical vapour transport experiments (700 → 600 °C, addition of I2; bronze coloured, needle shaped single crystals) as well as by isothermal heating. The crystal structure, which is isostructural to WV2O3(P2O7), was refined from single‐crystal X‐ray diffraction data (C2/c, Z = 4, a = 12.2503(5) Å, b = 12.6731(5) Å, c = 5.2188(2) Å, β = 89.968(2)°; 1194 independent reflections, 66 variables, 8 atoms in asymmetric unit, R1 = 0.023, wR2 = 0.049). It consists of [P2O7] groups and highly distorted [ReO6] octahedra [1.822(4) ≤ d(Re–O) ≤ 2.031(4) Å]. The latter forming ribbons [ReO3/1O3/2], which can be regarded as sections of the ReO3 structure type. The infrared spectrum of ReV2O3(P2O7) is reported. An assignment of selected vibrational modes for Re–O and P–O is given.
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