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Spectroscopic Characteristics of Sapphire from Madagascar Diffused with Beryllium  

Jung, Soon-Hee (Department of Materials & Chemical Engineering, Hanyang University)
Ahn, Yong-Kil (Department of Materials & Chemical Engineering, Hanyang University)
Seo, Jin-Gyo (Division of Materials Science & Engineering, Hanyang University)
Park, Jong-Wan (Division of Materials Science & Engineering, Hanyang University)
Publication Information
Journal of the Mineralogical Society of Korea / v.22, no.2, 2009 , pp. 87-95 More about this Journal
Abstract
The spectroscopic characteristics of the diffusion of beryllium into sapphire are investigated by UV-Vis and FTIR spectroscopy. The $Be^{2+}$ diffused samples are observed in an immersion filled with methylene iodide. The blue colors were fainteddue tochanges of iron's electrovalence ($Fe^{2+}$${\rightarrow}$$Fe^{3+}$) after heat treatment in an oxidation atmosphere and the pink color appeared due to $Cr^{3+}$ in case of violet sapphire. The blue sapphire containing light brown showed yellow orange color due to reaction of beryllium with trace elements during the beryllium diffusion. From analysis of immersion filled with methylene iodide, we could demonstrate to show yellow orange with concentrated color in the rim of samples. Also, there were some changes to the pre-existed inclusions.
Keywords
sapphire; beryllium; diffusion; spectroscopic characteristics;
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