Scandium telluride

Men kov et al. (1959, 1961) synthesised two scandium tellurides and determined their crystal structures. The data of Men kov et al. (1959) about the cubic y -AhOs-type structure for the compound Sc2Te3 had not been confirmed by a single-crystal structure investigation of that phase performed by White and Dismukes (1965) (see table 12). The latter authors obtained also a specimen of Sc2.3Te3 composition isotypic with Sc2Te3 with the lattice parameters a=4.113, c=4.051 A. This result seems to indicate the occurrence... 

The lattice is rhombohedral R3tn. The scandium atoms occupy the octahedral sites situated between each layer of tellurium. One layer of cations in two is completely full, while the other has only 5 of its sites occupied in a disordered way. A nonstoichiometric Sc7/3Tej telluride is described in the same crystal structure with a partial filling of the vacant sites (White et al., 1965b). 

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