Z. Gajek et al., INTERPRETATION OF THE OPTICAL-ABSORPTION SPECTRUM OF URANIUM GERMANATE, Journal of physics. Condensed matter, 5(49), 1993, pp. 9223-9234
Visible and infrared absorption spectra of U4+ in UGeO4 are described
and interpreted in terms of the standard parametrization scheme- One o
f the two models considered is consistent with available interpretatio
ns of other uranium germanates and silicates. The second one originati
ng from theoretical estimation of the crystal-field effect permits exc
eptional properties of the compound under consideration, in particular
, an untypical assignation of the electronic energy levels and values
of the crystal-field parameters in comparison with other tetragonal ox
ides.