X-射线粉末衍射技术对天然紫晶与合成紫晶的鉴定  

Identification of amethysts and synthetic amethysts by X-ray powder diffraction technology

作　　者：金绪广 梁峙 蔡薇 吴海娟[1] 杨桂群 陈小军 王金砖[1,2] JIN Xu-guang;LIANG Zhi;CAI Wei;WU Hai-juan;YANG Gui-qun;CHEN Xiao-jun;WANG Jin-zhuan(Nanjing Institute of Supervision & Testing on Product Quality, Nanjing, 210028,China;National Center of Supervision & Inspection on Gold and Silver Products Quality (Nanjing), Nanjing, 210028, China)

机构地区：[1]南京市产品质量监督检验院,南京210028 [2]国家金银制品质量监督检验中心,南京210028

出　　处：《超硬材料工程》2020年第2期39-42,共4页Superhard Material Engineering

基　　金：南京市质量技术监督局重点科技项目(KJ2016015)。

摘　　要：针对天然紫晶和合成紫晶在珠宝检测实验室存在着难以鉴别的问题,采用X─射线粉末衍射技术对这两类紫晶开展了初步研究,运用结晶度和晶粒度的特征参数进行了分析。研究结果表明,合成紫晶的结晶度大于95.0%,而天然紫晶结晶度小于该值,具有明显的特征;另外合成紫晶和天然紫晶的晶粒度也存在明显区别。因此,X─射线粉末衍射技术可以作为鉴别天然紫晶和合成紫晶的准确、快速鉴定技术。The identification of amethysts and synthetic amethysts is very difficult in the laboratory of jewelry appraisal testing.X-ray powder diffraction technology was used to study identification of amethyst types,and the characteristic parameters of crystallinity and the grain size obtained by X-ray powder diffraction technology were built for the identification and analysis of amethyst products.The results showed that the crystallinity of synthetic amethysts was greater than 95.0%,while that of natural amethysts was below the value.In addition,the grain size of synthetic amethysts and natural amethysts was also significantly different,which was used to identify amethyst type.So,X-ray powder diffraction technology could be used to accurately and quickly identify amethysts and synthetic amethysts.

关 键 词：天然紫晶 合成紫晶 X─射线粉末衍射 结晶度 晶粒度 

分 类 号：P575.4[天文地球—矿物学] TS933[天文地球—地质学]