文摘
Pb2BiS2I3 (I), Sn2BiS2I3 (II), and Sn2BiSI5 (III) are prepared by solid state reaction of stoichiometric amounts of PbS and BiI3 for (I) (silica tube, 500 °C, 72 h; ≈90% yield) and from a 2:1:2:3.15 molar mixture of Sn, Bi, S, and I2 for mainly (II) and minor amounts of (III) (evacuated silica tubes, 500 °C, 24 h).