新疆和田透闪石软玉的振动光谱  

Vibrational Spectra of Hetian Nephrite from Xinjiang

作　　者：张永旺[1,2] 刘琰[3] 刘涛涛[1] 木合塔尔·扎日[2] 刘元晴 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,盆地与油藏研究中心,北京102249 [2]新疆大学地质与勘查工程学院,新疆乌鲁木齐830046 [3]中国地质科学院地质研究所,北京100037

出　　处：《光谱学与光谱分析》2012年第2期398-401,共4页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展计划(973计划)项目(2011CB403100)资助

摘　　要：采用X荧光光谱、X光粉晶衍射、红外光谱和拉曼光谱等对新疆和田地区的白色、青色和黑色透闪石软玉进行了化学成份和振动光谱研究。在通过X光粉晶衍射判定所采样品全部属于透闪石质软玉后,采用红外光谱仪和拉曼光谱仪对样品进行振动光谱测试,并结合化学成分测试结果分析白玉、青玉和墨玉等不同颜色的软玉中透闪石晶体结构M1、M3位置中阳离子占位情况。红外光谱中M—OH吸收谱带显示样品在M1及M3位置不仅有Mg2+和Fe2+,还有Fe3+。M—OH的吸收谱带和振动光谱特征与化学成分测试结果一致。在此基础之上,总结了新疆和田透闪石软玉中阳离子的种类和含量对振动光谱的影响。In previous studies,EMPA,PIXE and others were employed to study the chemical compositions of nephrite separately without a systematical measurement.In the present study,XRF,XRD,IR and LR were used together to examine chemical and spectra characteristics of white,green and black nephrite from Hetian,Xinjiang.XRD results indicate that all nephrite samples consist of tremolite.Then IR spectra of nephrite samples suggest that the M—OH stretching vibration bands show that the M1 and M3 sites are not only occupied by Mg2＋ and Fe2＋,but also by Fe3＋,which is consistent with the chemical compositions of these samples.This information might be useful to understanding the variety of nephrite.Their Raman spectra are almost the same,while some differences exist because of different content of FeO/Fe2O3.

关 键 词：透闪石 软玉 化学成分 阳离子占位 红外光谱 

分 类 号：O657.3[理学—分析化学]