The results of a comparative evaluation of the March model and the generalized spherical harmonic description for preferred orientation using X-ray powder diffraction data for molybdite (MoO₃) and calcite show that the generalized spherical harmonic description generally provides superior figures-of-merit compared with the March model.

The March model and the generalized spherical harmonic description for modelling preferred orientation with pressed molybdite and calcite neutron powder diffraction data, with reference to the reliability of the formulations and their use in correcting intensities for texture bias, are presented.