Synthesis, structural characterisation, semiconducting
properties and magnetic measurements of
Ti3(1x)Mx M0
2xO6 (M=Co, Ni; M0=Sb, Nb) solid
solutions were reported by Pico et al.1012 These authors
established the compositional range for which the rutile
structure was maintained (0.14x40.3). Samples were
prepared from a powdered mixture of TiO2, CoCO3 or
NiCO3 and Sb2O5 or Nb2O5, in stoichiometric amounts
by heating in air from 1423 to 1523 K for 72 h. In these
phases, all the cations were randomly distributed in the
parent lattice and no cooperative interactions took place. Coloration of these materials was not included in
these studies.