Figure 1
(a) Ball-and-stick model of bulk α-As4S4 viewed from the [111] direction. (b) The positions of the centres of mass c1 to c4 of the cage-like molecules. (c) A geometric representation of the As4S4 cage-like molecule, highlighting the As4 disphenoic group and the S4 planar square. Colour coding for atoms: green – As, yellow – S. |