  The interaction of anisotropic point defects in anisotropic media is studied
in the framework of anisotropic elasticity with eigendistortion. For this
purpose key-equations and their solutions for anisotropic point defects in an
anisotropic medium based on the anisotropic Green tensor are derived. The
material force, interaction energy and torque between two point defects as well
as between a point defect and a dislocation loop are given. We discuss
so-called contact terms and point out similarities between elastic, electric,
and magnetic dipoles. The plastic, the elastic and the total volume changes
caused by an anisotropic point defect in an anisotropic material and the
related Eshelby factor are determined. Thereby, the Eshelby factor is given in
terms of the Eshelby tensor.
