Electron doping into Cd 3 TeO 6 with a 1:1 ordered perovskite-type structure was carried out by two methods: the introduction of oxygen vacancies, and the atomic substitution of In for Cd. Both methods turned polycrystalline samples into metallic conductors while single crystals with metallic conductivity were obtained by the second method. The resistivity and thermoelectric power of the single-crystal indium-substituted sample were 0.6 mΩ·cm and -50 µV·K -1 , respectively, giving a power factor of 4 × 10 -4 W·K -2 ·m -1 , which is the highest among nontransition metal oxides.
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Shan et al. (2002) studied this question.
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