The mixed polychalcogenorhenate(IV) anions [Re4Q4(S3)4(S4)2](4-) (Q = S, Te): syntheses and crystal structures of [NMe4]5[Me2NH2]3[Re4Se4(S3)4(S4)2](2)*2.25H2O and [NH4]4[Re4Te4(S3)4(S4)2]*8H2O.