Optical Spectroscopy of Green Vnadium Apophyllite from Poona, India

George R. Rossman
Division of Geological and Planetary Sciences
California Institute of Technology, Pasadena, CA  91109


Emission spectrographic analysis of a light green apophyllite from Poona, India, indicates that 1600 ppm V and 350 ppm  Mn are the prin cipal trace constituents. Only 70 ppm Fe ws found. Optical spectra have been obtained which indicte that tetravalent vandium is primarily responsible for the color and dichroism of this material.

Apophyllite spectrum

Optical spectra of green apophyllilte from Poona, India.

sample of apophyllite

Green apophyllilte from Poona, India.

last updated: 27-Jul-2023