

Axial texture gives asymmetric doublet spectra of ^{57}Fe and ^{119}Sn, excess of I_{π} component (δI_{π}) could be evaluated for perfect axial textures in different geometries of Messbauer experiments. The δI_{π} dependency on asymmetry parameter η and on the orientation of EFG tensor principal axes in single particle relatively the axial texture axis can be presented as
δI_{π} = I_{π}  0.5 = 3 [8 (1+a^{2})]^{1} * (1  3cos^{2} γ_{0} )]*
*[1/3 (a^{2}  1) + 0.5 sin^{2} Θ_{0} (1  a^{2} + 2 * 3^{1/2} * a cos 2 Β_{0})],
where
a = η [3^{1/2} (1 + (1 + η^{2}/3 )^{1/2})] ^{1}
γ_{0} is the angle between the gammarays and the normal to the sample plain (axial texture);
Θ_{0} is the angle between the EFG tensor main axis (z) and the preferential crystallographic direction n of nonisometric particles in the texture.
Β_{0}  the angle between xaxis and the line, which is common for the xy plain and the plane, perpendicular to the n direction.
The δI_{π} value depends on two factors. The first one depends just on geometry of Messbauer experiment (the angle γ_{0} ), the second  just on the sample properties: local field parameter η and features of axial texture used  Θ_{0} and Β_{0}.
