Investigation of Chemical Bonds on Complex Crystals

In this paper, the method that the crystal formula are decomposed into bonding formula, was posed. The relation between the crystal formula and bonding formula-bonding formula equation, was established. The effective charge of a valence electron was given. The theoretical calculation of chemical bonds on complex crystals was solved systematically and it is applied to calculate Y₃Al₅O₁₂, YAlO₃, Y₂O₃, YVO₄ and YPO₄ crystals.