Relationship between charge transfer energies of Yb3+ and Sm3+ and crystal environmental factor

Relationship between charge transfer energies ECT of Yb3+ and Sm3+ and environmental factors he in various crystals was investigated using a dielectric chemical bond method. Both results show that they have an exponential relation ECT=A+B exp(−khe), but the exponential factors are different, which indicates that the interaction between the rare earth ions and environment is connected with the kind of rare earth ion. This result provides a method of determining charge transfer energies of Yb3+ and Sm3+ from a crystal structure.