田黄的红外与拉曼光谱研究  

Infrared and Raman Spectra Study on Tianhuang

作　　者：刘云贵[1] 陈涛[1,2] 

机构地区：[1]中国地质大学珠宝学院,湖北武汉430074 [2]中国地质大学地质过程与矿产资源国家重点实验室,湖北武汉430074

出　　处：《光谱学与光谱分析》2012年第8期2143-2146,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(41172050)资助

摘　　要：对中国寿山田黄石进行了X射线粉晶衍射(XRD)、红外光谱和拉曼光谱测试,以获得田黄的谱学特征。研究表明田黄有地开石质、珍珠陶石质和伊利石质三类,其红外特征吸收峰分别为3 621,3 629和3 631cm-1,拉曼特征峰分别为3 626,3 627和3 632cm-1,3 550～3 750cm-1间OH振动所致拉曼谱峰与红外结果一致。地开石质田黄含无序、有序两类,无序地开石OH3振动吸收峰相对有序地开石向低波数方向移动8cm-1,相对强度增强,无序结构可能与高含量的Fe有关。3 550～3 750cm-1间地开石OH振动红外吸收峰强于珍珠陶石,表现为珍珠陶石质田黄的红外光谱明显叠加有副矿物地开石的强吸收峰。伊利石质田黄主要为2M1型伊利石,并含有少量1M型伊利石。这些特征为科学鉴定田黄提供了理论依据。The Tianhuang stones, from Shoushan in China, were studied by using X-ray powder diffractometry （XRD）, infrared （IR） spectroscopy and Raman spectroscopy to obtain the spectra characterization. Wave numbers 3 621, 3 629 and 3 631 cm-l in the IR spectra and 3 626, 3 627 and 3 632 cm--1 in the Raman spectra are the characteristic peaks of dickitic Tianhuang, nacritic Tianhuang and illitic Tianhuang, respectively. Raman spectra assigned to OH are in good agreement with the IR results at 3 550 -3 750 cm^-1. Dickitic Tianhuang includes ordered dickite and disordered diekite. Compared with ordered dickite, the band assigned to OH3 of disordered dickite shifts to low-frequency by 8 cm-1 and the relative intensity becomes stronger. The disorder structure may relate to the high level of Fe. The IR absorption spectra of nacritic Tianhuang superimposes strong peaks of dickite, indicating that IR absorption bands of dickite are stronger than that of nacrite at 3 550-3 750 cm-1. The main mineral com- position of illitic Tianhuang is 2M1, while illite Tianhuang contains a small amount of 1M. All these characters provide a theoretical basis for the scientific identification of Tianhuang.

关 键 词：田黄 XRD 红外光谱 拉曼光谱 

分 类 号：P575.4[天文地球—矿物学]