Synthesis and crystal structure of the quaternary semiconductor Cu2NiGeS4, A new stannite-type compound

Abstract

The crystal structure of the quaternary compound Cu2NiGeS4, belonging to the system I2-II-IV-VI4, was characterized by Rietveld refinement using X-ray powder diffraction data. This material crystallizes with a stannite structure in the tetragonal space group 142m (No 121), Z = 2, unit cell parameters a = 5.3384(1) Å, c = 10.5732(3) Å, V = 301.32(3) Å3, acknowledged as a normal valence adamantanestructure.