PIXE analysis of precious and semi precious Gem stone minerals of Alexandrite (BeO.Al2O3) of Chrysoberyl Gem stone and Chrysoberyl cats eye, Visakhapatnam from parts of South India.

D.V.L.SIRISHA

Volume : V, Issue : IX, September - 2016

PIXE analysis of precious and semi precious Gem stone minerals of Alexandrite (BeO.Al2O3) of Chrysoberyl Gem stone and Chrysoberyl cats eye, Visakhapatnam from parts of South India.

D. V. L. Sirisha

Abstract :

PIXE method is a non–destructive technique of elemental analysis, comprising a detector, the amplifier, spectroscopy amplifier, analog to digital convertor, multi–channel analysis and an output device. Sample is presented to a detector and the results are stored in the digital form. In the present study, five elements namely Fe, Al, Mn, Cr and Se were determined in addition to the rare earth elements. The distinction of chrysoberyl / chrysoberyl cat�s eye and alexandrite is also determined due to the variation of the concentration by the element chromium. Chromium recorded higher concentration up to 4.92% from 0.92% due to the intensity of colour change of mineral from green to red under incandescent light. This forms a major contribution of the present investigation.