Polarization factors in the symmetrical case of three-wave diffraction

Particular results of an unconventional approach to the geometry of multiple diffraction are presented. The scalar relations between polarization components of three waves in the symmetrical case, i.e. when the triplet of diffraction vectors forms an isosceles triangle, are considered. The polarization factors are given in simple trigonometric form as functions of the Bragg angle of principal reflection and of a crystallographic parameter, which unambiguously describes such a three-wave configuration.