Spin and electric field gradient texture studies by Moessbauer spectroscopy with polarized gamma rays

From Moessbauer spectra of 57Fe with elliptically polarized radiation we fit the coefficients of the spin (or electric field gradient) texture function expanded in real spherical harmonics up to 1=2. We determine, and show in perspective graphs, the spin texture of the surface of a transformer metal sheet (Fe-Si), of magnetic videotapes (demagnetized and magnetized) and the electric field gradient texture of a power of an organometallic compound. We calculate some averages that have an important physical significance. (orig.)