高温高压处理钻石的谱学研究  

SPECTROSCOPIC STUDIES ON THE HPHT-TREATED DIAMONDS

作　　者：苑执中[1] 彭明生[1] 蒙宇飞[1] 

机构地区：[1]中山大学宝石矿物材料研究所,广东广州510275

出　　处：《矿物学报》2002年第4期379-382,共4页Acta Mineralogica Sinica

基　　金：广东省自然科学基金资助项目 ( 980 2 6 9)

摘　　要：对高温高压处理钻石进行了显微观察及红外光谱、低温紫外 可见 近红外吸收光谱和光致发光谱等谱学研究 ,认为钻石的去色是由于高温高压过程引起晶格结构的重组 ,从而得出天然褐色钻石的致色与位错附近的孤氮 空穴 (N V)的点缺陷有关的结论。同时也提供了高温高压处理钻石的一些谱学特征 ,如红外光谱中较弱的 31 0 7cm-1峰 ,紫外 可见吸收光谱中的 32 5nm宽带 ,光致发光谱中的5 75nm与 637nm峰。Microscopic observation and FTIR, UV-VIS-NIR, PL spectroscopic studies were carried out on the HPHT-treated diamonds. It is considered that the reduction of brown color is due to the lattice reconstruction caused by the HPHT process. So it can be concluded that the coloration of natural brown diamonds is related to the N-V point defects near the dislocation. And some spectral characteristics of the HPHT-treated diamonds are also presented.

关 键 词：钻石 红外光谱 紫外-可见-近红外吸收光谱 光致发光谱 温度 压力 致色机理 

分 类 号：P578.6[天文地球—矿物学]