Benchmarking 3D-ΔPDF analysis using in-house X-ray sources

Measurement of diffuse scattering data and subsequent three-dimensional difference pair-distribution function (3D-ΔPDF) analysis of correlated disorder are compared for in-house and synchrotron sources.

Updating direct methods III. Reduction of structural complexity when first-rank semi-invariants are estimated via the Patterson map

A novel theory for the one-phase semi-invariant estimates is presented. The theoretical approach uses the Patterson map as prior information.

Double-slit X-ray dynamical diffraction in elastically deformed crystals

The double-slit Laue symmetrical case dynamical diffraction of X-rays in a crystal influenced by a constant temperature gradient is investigated. The dynamical diffraction double-slit interference fringes are formed; for the period of the fringes an expression is obtained, which depends on the modulus of the temperature gradient and is polarization sensitive.

Refuting `a new theory for X-ray diffraction' – a reciprocal-space approach

A `new theory for X-ray diffraction' proposed by Fewster in 2014 is shown to be based on a conceptual error. Residual intensity away from Bragg peaks is also discussed.