Autunite Visible Spectra (400
- 1000 nm)
Autunite, Ca(UO2)2(PO4)2·10-12H2O, owes its color to the UO22+
ion,
Image of the autunite absorption spectrum
-  Autunite
spectrum;
from the Daybreak Mine near Spokane, Washington, USA, 0.092 mm thick
sample. This mineral contains the UO22+
ion which is responsible for all the structure in the
spectrum. 
The spectrum was obtained in the E perpendicular to c
direction on a cleavage plate. 
 
Link
to references to visible spectroscopy of
autunite/meta-autunite
 
 
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revised
3-Jul-2022