EFFECT OF BERYLLIUM HEAT TREATMENT IN SYNTHETIC RUBY
Abstract
We study the effect of Be atoms in the corundum structure by using UV-Vis-NIR spectroscopy as well as X-ray absorption spectroscopy on synthetic ruby samples obtained by the Verneuil process. From the X-ray absorption near edge structure (XANES) spectra, the Be atoms are shown not to be related to the Cr environment. Furthermore, the UV-Vis-NIR absorption spectra are similar for the unheated, traditionally heated, and Be-heated synthetic ruby samples. However, the Be atoms are able to produce a brown-colored center, and the mixing of the red and the brown colors yields the orange in the Be-heated synthetic ruby samples. We propose that the orange color in the Be-heated synthetic ruby samples is caused by the Be2+ donor state at 475 nm (2.61 eV) in multiple UV-Vis-NIR wavelength excitation spectra.
About the Authors
N. Monarumit
Kasetsart University
Thailand
50 Ngam Wong Wan Rd., Chatuchak, Bangkok, 10900
Thailand
50 Ngam Wong Wan Rd., Chatuchak, Bangkok, 10900
T. Lhuaamporn
The Gem and Jewelry Institute of Thailand
Thailand
140 ITF-Tower Building Silom Rd., Bangrak, Bangkok, 10500
Thailand
140 ITF-Tower Building Silom Rd., Bangrak, Bangkok, 10500
S. Satitkune
Kasetsart University
Thailand
50 Ngam Wong Wan Rd., Chatuchak, Bangkok, 10900
Thailand
50 Ngam Wong Wan Rd., Chatuchak, Bangkok, 10900
W. Wongkokua
Kasetsart University
Thailand
50 Ngam Wong Wan Rd., Chatuchak, Bangkok, 10900
Thailand
50 Ngam Wong Wan Rd., Chatuchak, Bangkok, 10900
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Review
For citations:
Monarumit N., Lhuaamporn T., Satitkune S., Wongkokua W. EFFECT OF BERYLLIUM HEAT TREATMENT IN SYNTHETIC RUBY. Zhurnal Prikladnoii Spektroskopii. 2019;86(3):454-460.
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