Design of new oxide crystals with improved structural stability

We introduce a method of searching for crystals with high structural stability and its application to the garnet, KTiOPO4 (KTP), huntite-borate, and langasite structures. Results are presented which show that, by using appropriate substitution, an increase of the stability can be achieved. This review gives models and experimental techniques of optimization of compositions for the complex oxide materials with the given structure. Sometimes application of the method mentioned can be used for the determination of the congruently melting composition. Optimization of composition from the point of view of minimization of atom-atom interaction potential energy is discussed. Experimental methods reported are based on the study of segregation and phase formation phenomena.