Chemical vapour transport of transition metal oxides (III) crystal growth of Ti1−xRuxO2 and doped TiO2

Single crystals of the system Ti_1?xRu_xO₂ have been prepared by chemical vapour transport in closed ampoules using halide transport agents. The crystals are single phased for x ≦ 0.02 and 0.98 ≦ x. In the intermediate range a highly ordered two phased system is found. The pure RuO₂ crystals are substantially larger than any grown by open sysem chemical vapour transport. Single crystals of TiO₂ doped with other impurities have also been prepared.