MESO - a program to convert X-ray diffraction data from angular to reciprocal space

A computer code has been developed to convert X-ray diffraction data genera ted by Siemens X-1000 and Siemens HISTAR area detectors and INEL CPS 120 li near detectors from angular to reciprocal space. Programs have been written to visualize and analyse the resulting data using AVS (Advanced Visual Sys tems Inc., MA, USA). Two examples of the application of MESO to problems in X-ray diffuse scattering are presented. Firstly, the 'butterfly' associate d with tweed microstructure in the high-temperature superconductor YBa2(Cu1 -xMx)(3)O7-delta. Secondly, the 'dog bone' generated by scattering off doma in walls in the perovskite-like WO3.