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Gamma Irradiation on Rubellite Tourmaline


Paper Type 
Contributed Paper
Title 
Gamma Irradiation on Rubellite Tourmaline
Author 
Nantharat Bunnag* and Tasnara Sripoonjan
Email 
b_nantharat@yahoo.com
Abstract:
 Effect of gamma rays on changes color of rubellite tourmaline from Afghanistan,
Mozambique and Nigeria were studied. The gamma irradiation process was done using cobalt-60
radiation; the samples were irradiated to 100 Mrad. Most samples had their color changed. It
was obviously seen in the Afghanistan samples. Their optical spectra were investigated by UVVis
spectroscopy. After irradiation, most samples showed stronger absorption band of Mn3+,
centered at 520 nm. Additionally, the irradiated Mozambique and Nigeria samples became darker
brown tint related with an increasing of Fe2+-Ti4+ IVCT absorption band. The trace elements
analysis proved that the Afghanistan samples contained higher manganese than the samples
from Mozambique and Nigeria. In the other hand, the iron content of Afghanistan samples
were much lower than that of Mozambique and Nigeria samples.
 
Start & End Page 
1249 - 1255
Received Date 
2019-06-10
Revised Date 
Accepted Date 
2019-08-01
Full Text 
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Keyword 
tourmaline, rubellite, gamma irradiation, optical absorption
Volume 
Vol.46 No.6 (November 2019)
DOI 
Citation 
Bunnag N. and Sripoonjan T., Gamma Irradiation on Rubellite Tourmaline, Chiang Mai J. Sci., 2019; 46(6): 1249-1255.
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Chiang Mai Journal of Science

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