Preparation and crystal structure of a new high-pressure phase (V0.5Re0.5)O2 with rutile-type structure

The new complex oxide (V0.5Re0.5)O-2 has been synthesized under high pressure of 60 kbar at 1000 C, and its crystal structure determined by single crystal X-ray diffraction data analysis (S.G.: P4(2)/mnm, a = 4.6357(4) Angstrom, c = 2.8292(3) Angstrom, V = 60.80(1) Angstrom(3)). This compound adopts a rutile-type structure with random cation distribution on one crystallographic site. The substitution of 50% vanadium by rhenium stabilizes the high temperature form of VO2 at room temperature. The cation ratio of 1: 1 was confirmed by EDX analysis performed by electron microscopy on the same crystals used for X-ray diffraction.