Quantitative powder diffraction using a (2+3) surface diffractometer and an area detector.

X-ray diffractometers primarily designed for surface x-ray diffraction are often used to measure the diffraction from powders, textured materials, and fiber-texture samples in so-called $2\theta$ scans. There are, however, very few examples where the measured intensity is directly used, such as for Rietveld refinement, as is common with other powder diffraction data. Although the underlying physics is known, converting the data is time-consuming and the appropriate corrections are dispersed across several publications, often not with powder diffraction in mind. In this paper we present the angle calculations and correction factors required to calculate meaningful intensities for $2\theta$ scans with a (2+3)-type diffractometer and an area detector at the I07 beamline, Diamond Light Source. We also discuss some of the limitations with respect to texture and instrumental resolution, and what kind of information one can hope to obtain.