Celestine Visible Spectra
Celestine, would be colorless if it were the pure strontium sulphate
Celestine absorption spectrum
- CIT-13378 spectrum;
from the Santa Levrada Mine, near Mapimi, Durango, Mexico,
The blue celestine
sample is 23.18 mm thick. Data Files: E \\ beta = b-axis.; E \\ gamma = a-axis.
A radiation damage color center is the cause of the color. A number of
radiation-induced centers have been identified by EPR spectroscopy in celestine
including SO3-, SO2-, O-,
PO32-, and PO22-.
Bakhtin, Khasanov and Vinokurov (1973) attribute the bands at ∼435 nm
to SO2- and at ∼620 nm to O-