辉石巨晶结构OH的分子光谱结晶学定向初探  

Crystallography Orientation by Molecular Spectrum of Structural Hydroxide in Pyroxene Megacryst

作　　者：王蓉[1] 张保民[1] 赵珊茸[1] 孟杰[1] 

机构地区：[1]中国地质大学(武汉)地球科学学院,湖北武汉430074

出　　处：《光谱学与光谱分析》2010年第4期869-874,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40372027;40872040)资助

摘　　要：利用分子光谱谱带位移、谱带强度、谱带形态等的变化，可以初步对晶体作结晶学定向。普通辉石结构OH红外光谱3组谱带值，垂直c轴方向相对于平行c轴的谱带各不相同：第一组谱带值，3629～3633cm^-1谱带红移到3601-3616cm^-1；第二组谱带值3514-3543cm^-1。同样有红移现象；第三组3460～3465cm^-1的谱带值相反则有蓝移现象。相对强度上，两个方向上第一组的谱带强度相当；第二组、第三组谱带强度平行方向明显强于垂直方向。形态上则差别不大。拉曼谱垂直方向谱带强度普遍强于平行方向，谱带位置与形态基本不变。结构OH不同结晶方向的谱图性质可以反映一定的地质构造环境。Crystal can be crystallographieally oriented by molecular spectrum with the change in band shift, band intensity, and band shape. The three groups of band shift of augite are different between vertical to c-axls and parallel to c-axis., the first peak value 3 629-3633 red shifts to 3 601-3 616 the same as the second peak value 3 514-3543; on the contrary, the third peak value 3 460-3465 is blue shift. The intensity of the first band is equivalent in two directions, while the second and the third parallel to c-axis are much stronger than the vertical. The wave shape is not quite different. The intensity of the Raman spectra vertical to c-axis is stronger than that parallel to c-axis in general, while the band shift and the shape show little difference. It was indicated that the geological tectonic environment can be reflected by the spectra of structural hydroxide with different crystal directions.

关 键 词：结构OH 分子光谱 结晶学定向 

分 类 号：O432.2[机械工程—光学工程]