The diffraction intensity distributions for orthorhombic crystals containing ordered twin boundaries of the system (110)<1¯10> were calculated in the kinematic approach using the Monte Carlo computer simulation technique. A simple model of short-range order in the arrangement of the twin boundaries was assumed to generate the nano-twinned structure. Analysis of the intensity distributions showed that such a twin boundary distribution resulted in the formation of extra peaks along the reciprocal lattice rods that were perpendicular to the close-packed planes. These extra peak intensities and positions were dependent upon the most probable distances between the twin boundaries and on the degree of short-range order.

Diffraction Features due to Ordered Distribution of Twin Boundaries in Orthorhombic Ni-Mn-Ga Crystals. A.Ustinov, L.Olikhovska, N.Glavatska, I.Glavatskyy: Journal of Applied Crystallography, 2009, 42[2], 211-6