Page 108 - Materials Chemistry, Second Edition
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2.3. The Crystalline State
Figure 2.62. Top: Energy splitting diagram for an octahedral Cr 3+ ion in the ruby lattice. Bottom: The
3
Tanabe-Saguno diagram for a d transition metal (the parity subscript g has been omitted from the term
symbols for clarity) along with an illustration of the transitions responsible for the absorption and
luminescence of Cr 3+ in ruby. Reproduced from Atkins, P. et al. Inorganic Chemistry, 4th ed., W. H.
Freeman: New York, 2006.
