Dumortierite Visible Spectra (350 - 1000 nm)
Dumortierite is commonly either blue or pinkish-lavender (or a color derived
from a mixture of these two colors. The color of dumortierite is usually
due to its iron and titanium content. Although the exact origin of color
is still under investigation, we know that it involves intervalence charge
transfer between Fe2+ and Ti4+. There are proposals
that Fe2+ - Fe3+ intervalence charge transfer is
also involved.
Images of representative dumortierite spectra
-
GRR 122 lavender durmortierite spectrum
image, 5K; 0.103 mm thick sample from Dehesa, San Diego County, California,
USA. Data Files: perpendicular to c, 26K; parallel
to c, 28K;
-
GRR 347 blue durmortierite spectrum
image, 5K; 0.066 mm thick sample from Sahirina, Madagascar. Data Files:
perpendicular
to c, 26K; parallel to c, 28K;
Data Files
-
no other data files
Back
to the list of minerals
Back
to the Mineral Spectroscopy home page
