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 |
Download |
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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