Abstract
From EPR and ligand field parameter some significant structural details of Cu(II)-compounds can be determined to a notable accuracy: a) the symmetry (tetragonal or orhombic) of Jahn-Teller distorted octahedral Cu(II)-sites, and b) the ordering of Jahn-Teller coupled Cu(II)-polyhedra with respect to each other as well as to the crystallographic axes of the Cu(II)-compound under investigation.