Apatite Visible Spectra (350 - 1100 nm)
The origin of color in apatite is often associated with the rare earth
elements. Nd is often the most abundant rare earth element in apatite.
Manganese is associated with the deep violet apatites. Many apatites
part of their color to natural radiation induced color centers
ions such as SiO3-
(green) and SO3-
Images of representative apatite spectra
These show prominent rare-earth lines in the spectrum
Green and Blue Apatites
GRR 1724, from the Fission Mine, Bancroft, Ontario, Canada. 3.84 mm
thick. Data Files: E⊥c;
blue apatite spectrum;Orginally
stated to be from a neodymium-rich carbonatite rock in Kenya,
more likely to have actually come from northern Madagascar . This
most likely heat-treated to turn it from green to blue. 2.53 mm thick.
Data Files: unoriented
From Buckingham, Quebec, Canada. 3.00 mm thick. Data Files: E⊥c; E\\c
From Buckingham, Quebec, Canada. The differences between the
greenish-blue sample above and this one are subtle. 2.50 mm thick. Data
Files: E⊥c; E\\c
Deep Blue Apatites
Pale Lavender Apatites
Compare these data to the data
published by Gilinskaya & Mashkovtsev (1995)
from Slyudyanka, Siberia, Russia. Color ascribed to SO3-.
- Bottle green;
from Aldan, Russia. Color ascribed to Nd, Pr, Ce plus SiO3-.
- Dark blue;
from Karelia, Russia. Color ascribed to MnO43-.
from Lovozero. Color ascribed to Pr, Nd, and a band at 520
colorless from Vishneyve Gory.
list of visible data files
to the Index to Data Files
last upgraded: March 2, 2013