Vapour growth and structural characterization of the new indium bismuth sulphide halides InBi2S4Cl and InBi2S4Br

The title compounds were prepared for the first time, and ledge-shaped single crystals were grown by chemical vapour transport. InBi₂S₄Cl(Br) crystallizes in the space group $\text{C}\text{2}\text{m}$ with lattice parameters a = 12.383 (12.55), b = 3.899 (3.90), $\text{c}\text{= 8.514 (8.58)}\text{A}\text{?}$, and β = 115.30 (115.2)°; Z = 2. The crystal structure of InBi₂S₄Cl was determined from 816 independent reflexions and refined to R = 4.0%. The indium atoms occupy the center of distorted sulphur octahedra which are linked to chains running in y-direction. They are interconnected by bands of bismuth and chlorine atoms. Bismuth is irregularly surrounded by six sulphur and two chlorine atoms.