Ilvaite Visible Spectra (400 - 2500 nm)
Ilvaite is of interest because it is a stoichiometric
intrvalence charge-transfer mineral with the formula: CaFe3+Fe2+2(Si2O7)O(OH).
Image of the ilvaite absorption spectrum
-
Ilvaite
spectrum;
GRR 556 from Elba, Italy. Plotted as 0.010 mm thick. The
color of this material
comes from Fe2+ - Fe3+
intervalence charge transfer. Data Files: E || alpha; E || beta; E || gamma.
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