Synthese und Kristallstrukturen der quaternären Chalkogenidchloride AgBi2S3Cl und AgBi2Se3Cl

Synthesis and Crystal Structures of the Quaternary Chalcogenide Chlorides AgBi₂S₃Cl and AgBi₂Se₃Cl Grey crystals of AgBi₂S₃Cl and AgBi₂Se₃Cl were synthesized from AgCl and Bi₂S₃ or Bi₂Se₃by cooling stoichiometric melts from 790 K to room temperature. X‐ray diffraction on powders and single‐crystals revealed that the compounds crystallize isostructural with space group type P 2₁/m. In the crystal structure of AgBi₂S₃Cl the bismuth(III) cations have a capped trigonal prismatic coordination of sulfide and chloride ions. The prisms constitute a three‐dimensional framework by sharing common edges and faces. Silver(I) cations, which have a distorted octahedral coordination of sulfide ions, fill linear channels. Parallels to the crystal structures of Cu₃Bi₂S₄Cl and Pr₂Br₅ can be seen.