Crystal Structures of the Cu6Hg0.973SiS5.973 and Ag6Hg0.897SiS5.897 Compounds.

Abstract The crystal structures of the Cu 6 Hg 0.973 SiS 5.973 and Ag 6 Hg 0.897 SiS 5.897 compounds were investigated using X-ray powder diffraction. These compounds are isostructural with Ag 6 Hg 0.82 GeS 5.82 (space group P2 1 3 , a =1.05547 nm). Lattice parameters are: a =0.98938(1) nm for Cu 6 Hg 0.973 SiS 5.973 and a =1.05055(2) nm for Ag 6 Hg 0.897 SiS 5.897 . Atomic parameters were refined in the anisotropic approximation ( R I =0.0698 for Cu 6 Hg 0.973 SiS 5.973 and R I =0.0718 for Ag 6 Hg 0.897 SiS 5.897 ).