Preparation, crystal structure, and electrical resistivity of SbRe2O6 with a Re-Re bond

摘要

The rhenium compound SbRe2O6 has been prepared by reaction of SbOReO4. 2H(2)O with rhenium metal in a sealed silica tube. Its structure was determined by single-crystal X-ray diffraction. Crystal data: monoclinic C2/c, a = 16.048(2) Angstrom, b = 4.920(1) Angstrom, c = 5.480(2) Angstrom, beta = 91.90(2)degrees, V = 432.4(2) Angstrom(3), Z = 4, R (R-w) = 0.028(0.028) for 560 reflections. The structure comprises Re2O6 layers, which are slices of the rutile structure along the 10 (1) over bar plane, and antimony atoms connecting the layers. The Re2O6 layers contain pairs of ReO6 octahedra sharing an edge and the Re-Re distance is 2.517(1) Angstrom. SbRe2O6 has ordered stacking of Re2O6 layers in the sequence ABAB .... The electrical resistivity of SbRe2O6 along the be plane shows metallic behavior (2 mu Omega-cm at 5 K and 61 mu Omega-cm at 280 K). (C) 1998 Academic Press. [References: 23]