Joaquinite Group
Visible Spectra (350 - 3000 nm)
Bario-orthojoaquinite, (Ba)4Fe2Ti2[Si4O12]2O2·H2O, is of interest because it contains ferrous iron in an unusual five-coordinated environment.
Image
of the bario-orthojoaquinite absorption spectrum
- GRR 158 spectrum;
the Gem Mine, San Benito County, California; plotted as 0.05 mm thick. Bario-orthojoaquinite contains Fe2+ in
a five-coordinated environment as well as overtones of water molecules
in the structure. Data Files: E||
alpha; E||
beta; E||
gamma
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