天然及处理翡翠的拉曼光谱荧光背景研究

The Fluorescence Background Research Based on Raman Spectroscopy in Natural and Manual Processing Jades

通过显微共聚焦-激光拉曼光谱技术对三类天然翡翠(钠铝辉石质、钠铬辉石质、绿辉石质)及处理翡翠进行测量,探究了不同类型翡翠拉曼光谱中荧光背景的差异。天然钠铝辉石质翡翠荧光背景大小是由其包含的能辐射荧光的杂质所决定的,而处理翡翠通常存在更多的杂质,荧光背景往往很高。钠铬辉石质的翡翠荧光存在很高的荧光背景,分析其原因是由于存在三价铬元素。对绿辉石质翡翠的荧光背景也作了探究。

Three kinds of natural jades（percivalite,kosmochlor,omphacite） and manual processing jades were characterized by the raman spectroscopy.Similarities and differences of the fluorescence background among different jades were explored.The Fluorescence intensity of the natural percivalite is determined by its fluorescent impurities inside.Because of more fluorescent impurities inside,the high-fluorescence background was common in manual processing jades.Due to the presence of Cr3＋,higher fluorescence background was found from the kosmochlor jade.The fluorescence background in the omphacite jade was also researched.