Study of the Electronic Absorption Spectrum of Crystals of Transition Metal Iodate

Abstract The electronic absorption spectra of spherocrystals of Ni(IO 3 ) 2 · 2 H 2 O, Mn(IO 3 ) 2 and 3 Cu(IO 3 ) 2 · 2 H 2 O were measured. Some new absorption peaks were obtained. Measured energy splitting by low‐symmetric crystal field and spin‐forbidden transitions are clearer than the results of diffuse reflection spectrum. And the experimental results were interpreted theoretically by means of nonfree radial wave functions and ligand field theory. The experimental results and the calculated values coincide.