Microstructure of Fibrous Sulphur

Abstract

PRINS et al.^1–4 have shown, using X-ray diffraction, that fibrous sulphur (S_ψ) is made up of a long-chained polymeric component (S_μ) together with a crystalline allotrope (S_γ). Prins et al.² have also proposed a model for the polymer in which the sulphur atoms are arranged in a helical structure with 3$\frac{1}{3}$ atoms per turn; later, Prins and Tuinstra³ suggested the possibility of a spiral superstructure of these helices, with a longitudinal repeat distance of 78 Å.