Accessible reciprocal-space region for non-coplanar Bragg and Laue geometries

Abstract

Accurate shapes of the accessible reciprocal-space region for non-coplanar Bragg and Laue geometries are given. Vector formulae for finding these regions and for experimental geometry calculations for obtaining diffraction from any accessible (using a given wavelength) reciprocal node are presented. A method for converting these formulae to scalar equations is proposed. Solutions are given and illustrated as three-dimensional figures in reciprocal space. © 2008 International Union of Crystallography.