EMPIRICAL TEXTURE CORRECTIONS FOR ASYMMETRIC DIFFRACTION AND INCLINEDTEXTURES

Empirical corrections for the preferred orientation of grains in powde r specimens have been generalized. Treatment of asymmetric diffraction geometries [Seemann-Bohlin (Guinier) geometry; glancing-angle geometr y] is included. Inclined textures (in which the maximum of the pole de nsity of preferentially oriented planes is declined from the direction of the diffraction vector) can be also treated. The distribution func tion of the poles of preferentially oriented planes does not need to b e axially symmetric even in the case of inclined textures. Rapid spinn ing around one axis is needed in this case. The texture-correction pro cedure has been implemented in the computer program DBWS-9006PC for Ri etveld refinement.