金刚石中微量元素的同步辐射X射线荧光分析

利用同步辐射X射线荧光技术,对人工合成金刚石以及产自山东、辽宁、湖南的天然金刚石进行了微量元素的测试分析。结果表明,在合成金刚石中,检测到了第四周期的元素(除As、Ge、Kr和Br外)和Pb;其中Fe、Co、Ni相对含量高,可能是合成时触媒的混入引起的。天然金刚石中检测到的微量元素有Ca、Ti、Cr、Mn、Fe、Co、Ni、Cu、Zn、W、Au和Pb,但相对含量比合成金刚石中相应的微量元素相对含量低。不同产地的天然金刚石中的微量元素种类及含量存在差异,反映了金刚石地幔生长环境的不同及岩浆对金刚石生长过程的影响。

Synchrotron Radiation X-ray Fluorescence Analysis of Trace Elements in Diamond

The trace elements in synthetic diamond samples and natural diamond samples from Hunan,Liaoning,and Shandong have been investigated by means of synchrotron radiation X-ray fluorescence.The results demonstrate that the fourth-period elements(except As,Ge,Kr and Br) and Pb are detected in the synthetic diamond.The contents of Fe,Co,Ni are relatively high attributed to the mixture of the catalyst during the high-temperature and high-pressure synthetic progress.Trace elements in the natural crystals of diamond are Ca,Ti,Cr,Mn,Fe,Co,Ni,Cu,Zn,W,Au and Pb,while their amount of corresponding trace elements is lower than those of the synthetic diamond crystals.Natural diamonds from different origins vary in the aspect of the kinds and the amount of the trace elements,which reflects that the mantle conditions are different and different melts or fluids from the environment are involved in growing diamond crystals.