Equations for diffuse scattering from disordered alloys with H.C.P. structure

General equations are presented for the diffuse scattering due to local atomic arrangements and displacements in disordered alloys having h.c.p. structure. The scattering due to static and dynamic displacements is treated separately. The calculations show that the second-order terms in displacements are sufficient for observing the direct effect of temperature factors, common to all contributions of diffuse scattering. A new data analysis scheme, using asymmetry of diffuse scattering around superlattice reflections, is presented for a complete separation of various components. (orig.)