Design in solid state chemistry based on phase homologies. Sb4Te3 and Sb8Te9 as new members of the series (Sb2Te3)m·(Sb2)n

Sb4Te3 and Sb8Te9 are members of the homology (Sb2Te3)m·(Sb2)n, with structures consisting of Sb2- and Sb2Te3-type slabs stacked along [001]; electrical conductivity and thermopower are reported for several members of this family.