“海纹石”的矿物学及谱学特征研究  

Mineralogical and Spectral Characteristics of Copper Pectolite

作　　者：郑晨[1] 尹作为[1] 殷科[2] 李益龙[2] 陈全莉[1] 刘云贵[1] 

机构地区：[1]中国地质大学珠宝学院,湖北武汉430074 [2]中国地质大学地球科学学院,湖北武汉430074

出　　处：《光谱学与光谱分析》2013年第7期1977-1981,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(41202038);中央高校基本科研业务费专项资金基金项目(CUG110804;CUG120279)资助

摘　　要："海纹石"是具有蓝色条带的针钠钙石,是一种稀有的宝石材料,具有较好的市场前景。为查明其矿物学特征及成因,采用常规宝石学测试并结合X射线衍射(XRD)、傅里叶红外吸收光谱(FTIR)、拉曼光谱(Raman)、扫描电镜(SEM)及紫外-可见分光光度计(UV-Vis)等现代测试方法,对"海纹石"不同颜色部分的矿物成分及特征进行了深入分析。XRD,FTIR,Raman分析结果表明,"海纹石"的主要组成矿物为针钠钙石,并含有少量的方解石,与SEM分析结果较为一致。FTIR分析显示,"海纹石"白色部分在1 500cm-1处出现一个明显的宽吸收带并伴有883和710cm-1的吸收峰,表明含有少量方解石,而蓝色部分在该处没有此吸收。紫外可见吸收光谱分析显示蓝色部分在可见光区有640nm宽吸收峰,表明可能含有微量元素Cu。"海纹石"白色和蓝色部分矿物组分的差异,表明两者可能形成于不同的地质环境。Copper pectolite, a type of pectolite with blue stripes, is a rare gem material with a great market prospect. Mineralogy and genesis were investigated using X-ray diffraction （XRD）, Fourier infrared absorption spectroscopy （FTIR）, Raman spec- troscopy （Raman）, scanning electron microscopes （SEM） and ultraviolet-visible spectrometer（UV-VIS） to understand the min- eralogical compositions and characteristics of the parts with different color. XRD, FTIR and Raman result showed that copper pectolite is composed of pectolite and minor calcite, consistent with the result of SEM. FTIR showed that an obvious band at 1 500 cm-1 with 883 and 710 cm-1 occurred on the white part that contain minor calcite, while the band was absent on the blue part. UV-Vis absorption spectroscopy analysis showed that the blue part has 640 nm absorption band in the UV area that indi- cates containing elements Cu. The different mineralogical compositions of the white and blue part indicate their different geolog- ical conditions

关 键 词：“海纹石” 矿物学特征 成因 宝石材料 现代测试方法 

分 类 号：P575.4[天文地球—矿物学]