Abstract
DURING the course of investigations of solid solutions involving van der Waals solids it was found that sulphur and tin tetraiodide combine readily in carbon disulphide or benzene solution forming a stable compound, the formula of which was determined as SnI4.2S8. The substance is orange in colour, has a measured density of 2.85 g/c.c., and melts at 101° C. It crystallizes either as orthorhombic pyramids by evaporation of a carbon disulphide solution or as third-order prisms by cooling of a saturated benzene solution, leading to the assignment of the point group mm2. (A metastable monoclinic modification of density = 2.80 g/c.c. was also observed during rapid cooling of benzene solutions.)
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