Jeremejevite Visible Spectra (400 - 1000 nm)
Jeremejevite, Al6(BO3)5(F,OH)3, is an uncommon aluminum fluoroborate found in granitic
pegmatites. Some samples have a strong pleochroism from blue to
colorless.
Image of the Jeremejevite absorption spectrum
-
GRR 1557 spectrum;
from Namibia. Plotted as 1.167 mm thick. The color
of this material
comes from Fe2+ - Fe3+
intervalence charge transfer. Data Files: E perp c;
E||c
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last updated: 6-Jul-2022
