Interrelationship Composition-Structure-Nonlinear Optical Properties in Aluminate Crystals

The relation composition-structure-property for a set of >100 simple and binary noncentrosymmetric aluminate crystals is considered. These crystals are distributed on the plane of the shortest metal-oxygen chemical bond lengths over an area, covered by a rosette of three ellipses. The distribution of ferroelastic and paraelastic aluminates having measurable level of nonlinear optical susceptibility is different. It is shown that small part of trigonal and monoclinic aluminum-bearing borates and phosphates possess noticeable chi((2)) level and only three polar crystals related to aluminum iodate family are characterized by pronounced chi((2)) level.