Notizen: The Crystal Structure of β-CsReO4, the Room-Temperature Modification of Cesium Perrhenate

Abstract

The crystal structure of β-CsReO4, the roomtemperature modification of cesium perrhenate, was determined from single-crystal X-ray data as orthorhombic, space group P nma, a = 5.7556(9), b = 5.9964(8), c = 14.310(2) Å and Z = 4. The structure was refined to R = 0.027, Rw = 0.023 for 779 absorption-corrected reflections. It represents an orthorhombic distortion of the tetragonal high-temperature phase α-CsReO4. The structure of β-CsReO4 comprises isolated ReO4 tetrahedra, linked together by Cs ions. The average Re-O distance was found to be 1.714(4) Å.