Synthesis, characterization and electrical properties of quaternary selenodiphosphates: AMP(2)SE(6) with A = Cu, Ag and M = Bi, Sb

Abstract

The new quaternary selenophosphate phases AMP2Se6 (A ¼ Cu, Ag and M ¼ Bi, Sb) were synthesized by ceramic methods at 1023 K. These phases were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray analysis (EDX) and a.c. and d.c. electrical conductivity measurements. The phases all show values of electrical conductivity, s, of about 10 4 O 1 cm 1 at 303 K and photoconductive effect. The conductivity is nearly five orders of magnitude larger than that of related phases.