Citation: Antje Mrotzek; Lykourgos Iordanidis; Mercouri G. Kanatzidis (2001). New Members of the Homologous Series Am[M6Se8]m[M5+nSe9+n]: The Quaternary Phases A1-xM'3-xBi11+xSe20 and A1+xM'3-2xBi7+xSe14 (A = K, Rb, Cs; M' = Sn, Pb). Inorganic Chemistry, 40, pp. 6204-6211.