天然尖晶石和焰熔法合成尖晶石的光谱特征对比研究  

Comparative Study on Spectral Characteristics of Natural and Flame-Melting Synthetic Spinels

作　　者：何珊珊 曹盼[1] 谭红琳[1] 祖恩东[1] He Shanshan;Cao Pan;Tan Honglin;Zu Endong(Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《激光与光电子学进展》2021年第5期309-316,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51662023)。

摘　　要：目前的市场上充斥着大量焰熔法合成的尖晶石,仅通过常规方法不能对合成尖晶石和天然尖晶石进行有效鉴别。为了准确鉴别天然尖晶石和焰熔法合成尖晶石,本文基于傅里叶变换红外光谱、X射线荧光光谱、吸收光谱和激光拉曼光谱,分别对天然尖晶石和焰熔法合成尖晶石进行分子结构、化学成分、致色机理等的研究,并对拉曼光谱在405 cm^(-1)位置的谱峰进行洛伦兹拟合,得到半峰全宽值,然后对半峰全宽值进行单因素方差分析。结果表明:天然尖晶石和焰熔法合成尖晶石的常规宝石学特征基本一致,但它们的分子结构、化学成分、致色机理、半峰全宽存在显著差异,可为鉴别天然尖晶石和焰熔法合成尖晶石提供理论依据。Today's market contains large quantities of flamemelting synthetic spinel,which cannot be effectively identified by conventional methods alone.To accurately identify natural and flamemelting synthetic spinels,we used Fourier transform infrared spectroscopy,Xray fluorescence spectroscopy,absorption spectroscopy,and laser Raman spectroscopy to study the molecular structures,chemical compositions,and color mechanisms of the spinel specimens.The fullwidthathalfmaximum(FWHM)was obtained by Lorentz fitting of the 405 cm^(−1) peak in the Raman spectrum and analyzed by oneway ANOVA(analysis of variance).Although the conventional gemological characteristics of natural spinel and flamemelting synthetic spinel were almost identical,there are significant differences in molecular structures,chemical compositions,color mechanisms,and FWHMs.The results provide a theoretical basis for distinguishing natural spinel from flamemelting synthetic spinel.

关 键 词：光谱学 天然尖晶石 合成尖晶石 红外光谱 X射线荧光光谱 拉曼光谱 半峰全宽 

分 类 号：P575.4[天文地球—矿物学]