Diffuse X-ray scattering in WO3

Abstract

The diffuse scattering in WO₃ has been investigated using high-resolution X-ray methods. The structure of the (040)/(400) diffraction profiles in a densely twinned orthorhombic crystal has been mapped. The scattering is characterised by strong, well defined Bragg peaks with a diffuse streak between these of intensity three orders of magnitude lower, arising from the domain walls. Comparison with a símple analytical model for the scattering from such a microstructure suggests an effective domain wall width of around 4 unit cells.