X-ray powder diffraction patterns of titanium carbosulphide and τ titanium sulphide

Abstract

The X-ray powder diffraction pattern of titanium carbosulphide has been calculated from crystal structure data and has been shown to be in good agreement with observations, but to differ significantly from previously published patterns. In a steel in which the concentration of sulphur was more than sufficient to form titanium carbosulphide with all the carbon present, hexagonal TiS was formed and not τ Ti₂S. It is argued, on the basis of this and other evidence, that the phase initially identified as τ Ti₂S was, in fact, titanium carbosulphide, and that τ Ti₂S does not exist.