The Bi-Te, Bi-Se, and Sb-Te systems have been assessed. The compounds Bi2Te3, Bi2Se3, and Sb2Te3 have been assessed using a 3 sublattice model and the intrinsic carriers of each compound have been assessed. The homologous series between the end-members have been assessed using a stoichiometric mixture of the end-members and a metastability has been assumed between them.
