山东昌乐蓝宝石颜色成因及谱学特征

The color causes and spectroscopy characteristics of sapphire from Shandong ChangLe

蓝宝石是指除去具有红色颜色的刚玉宝石(红宝石)其他颜色的刚玉宝石的统称。自80年代在我国山东昌乐五图发现蓝宝石以来,产于山东的蓝宝石一直以晶粒大、晶形完整为人们的关注。笔者通过对于收集的已分类为黄色系列和蓝色系列的山东蓝宝石样品进行放大观察、折射率测试、比重测试等对山东昌乐的蓝宝石的宝石学特征例如颜色、形态和大小、结构和包裹体等进行了描述,以及对样品做紫外、红外、拉曼等测试并分析其谱学特征。结果表明,山东蓝宝石的出现深色且略带黑色的暗色的颜色成因主要由于内部含有致色元素Fe以及Ti、Gr、V等;紫外光谱测得Al-O键的伸缩振动峰;红外透射光谱中,发现黄色系列缺乏3311cm^(-1)吸收峰;拉曼光谱测得山东蓝宝石中的赤铁矿包裹体与刚玉包裹体的特征。

Sapphire is refers to the other color corundum jewels removal of corundum with red color gem( ruby). Since the 1980 s,people found sapphire in Wutu Shandong,the sapphires which were found in Shandong has attracted attention of people with big grain size and crystal shape complete. The author collected sapphire samples from Shandong which already classified as series of yellow and blue. We made magnification and refractive index test,specific gravity test on sapphire samples and described the gemological characteristics of sapphire samples such as color,shape and size,structure and inclusion etc. In addition,We tested sapphire samples of uv- vis spectrum,infrared spectrum,raman spectrum and analysis its spectroscopy characteristics.The results show that,the sapphire samples present a dark with slight black color main causes of the internal contain color elements Fe,Ti,Gr,V and etc; Ultraviolet spectrum measured the stretching vibration peaks of Al- O keys; Infrared transmission spectra found that the yellow series lack of absorption peak 3311cm^(-1);Raman spectra measured absorption peaks of hematite and corundum which are inclusions of the sapphire samples.