Crystal Field Theory
Crystal field theory is a model describing the interaction between the electric charges of a cation and the surrounding anions. A more sophisticated version of this model, which includes covalent bonding effects, is the ligand field theory. Very frequently, however, the terms crystal field theory and ligand field theory are used synonymously. Crystal field theory can be used to extract thermodynamic properties (crystal field stabilization energies) from optical spectra of minerals and other substances. By considering crystal field stabilization energies, many features of the geochemistry of transition metals can be explained.
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