The bond valence model

The electrostatic flux of a bond is identified with the bond valence. As bonds become shorter, the electrostatic flux linking them increases, so that the bond length can be used to estimate the bond valence (experimental bond valence). Common expressions describing this correlation contain empirical parameters that are given in Appendix 1. The Kirchhoff laws can be expressed as equations whose solutions are the theoretical bond valences. The model, which applies to all bonds that link ions with opposite charge (acid-base bond) regardless of their ionic or covalent character, can be described in a number of formal assumptions and theorems such as the principle of maximum symmetry, the valence sum rule, the principle of electroneutrality, the equal valence rule, the distortion theorem, and the correlation between bond valence and bond length.