Crystal Tanabe-Sugano diagram

The energy level structure of partly filled d-orbitals can best be described by crystal field theory as expressed in Tanabe-Sugano diagrams. These account for absorption and luminescence spectra and allow the spectra to be correlated with crystal structure. 

Figure 7 Crystal field splitting of the lower spectroscopic terms of and d ions for octahedral coordination (Tanabe-Sugano diagrams) A, ligand field parameter B, Racah parameter (for Cr + substitutedfor Ah+U1AI2O3, A = 17 800 cm and S = 665 cm ). Vertical arrows in the d ion diagram represent radiative transitions ...

Fig. 4.5 a Tanabe-Sugano diagram for 3d system in an octahedral crystal field, b one-dimensional configurational comdinate diagram representing 3d system of the low field. Parabolas represent the electronic states. The vibtonic states are indicated by horizontal lines. b Adapted from Ref. [81], copyright 2006, with permission fiom Elsevier... 

Fig. 15.5 Tanabe-Sugano diagram for the electron configuration in an octahedral crystal field. Reprinted from Ref. [42]. Copyright 2013 with permission from Elsevier...

---