激光与光电子学进展, 2016, 53 (3): 033004, 网络出版: 2016-01-22   

拉曼光谱在蓝宝石包体研究中的应用 下载: 1482次

Application of Raman Spectroscopy in Sapphire Inclusion Research
作者单位
1 华东理工大学宝石检测中心, 上海 200237
2 上海建桥学院珠宝学院, 上海 201306
3 华东理工大学分析测试中心, 上海 200237
摘要
在斯里兰卡Ratnapura 地区的蓝宝石样品中观察到丰富的流体包体(部分流体包体中含有无色针状包体),形貌相似的深色板状矿物包体,以及3 组交角约为60°的红棕色针状矿物包体等。通过肉眼观测,研究人员对上述各类包体的矿物种类无法进行有效鉴别。利用激光共聚焦显微拉曼光谱仪对蓝宝石样品中的包体进行测试分析得出,深色矿物包体有两类,分别为磁铁矿和石墨;无色透明针状包体是位于液态CO2内的硬水铝石晶体;红棕色针状包体是赤铁矿,而不是易混淆的金红石针状包体。激光共聚焦显微拉曼光谱仪能够准确鉴定出蓝宝石中各种包体的种类,对不具备典型晶形的包体和常规仪器难以判别的包体十分有效。
Abstract
Abundant fluid inclusions (part of the fluid inclusions containing colorless acicular inclusions), dark plate mineral inclusions with similar morphology, and three groups of red brown acicular mineral inclusions with angle of about 60° etc. are observed in sapphire samples from Ratnapura, Sri Lanka. The type of mineral inclusions cannot be effectively identified by the naked eyes. The inclusions in sapphire samples are tested with a laser confocal micro- Raman spectrometer. The results show that the dark mineral inclusions can be classified into magnetite and graphite, and the colorless transparent needle-like inclusions are the diaspore crystals located within the liquid CO2. It is also shown that red brown needle-like inclusions are hematite and not the easily confusing rutile needle-like inclusions. Laser confocal micro- Raman spectrometer can accurately identify the types of inclusions in sapphire. It is very effective for the inclusions which are not with typical morphology or difficult to distinguish by conventional instruments.
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韩孝朕, 吴晓, 康燕, 刘学良, 郭守国. 拉曼光谱在蓝宝石包体研究中的应用[J]. 激光与光电子学进展, 2016, 53(3): 033004. Han Xiaozhen, Wu Xiao, Kang Yan, Liu Xueliang, Guo Shouguo. Application of Raman Spectroscopy in Sapphire Inclusion Research[J]. Laser & Optoelectronics Progress, 2016, 53(3): 033004.

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