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主要采用同步辐射貌相术和红外光谱研究了产于南非和我国辽宁天然金刚石的晶体缺陷特征,分析了这两个产地金刚石的同步辐射形貌像和红外光谱的异同,对同步辐射形貌像中星芒像的形成原因进行了分析,认为星芒像是晶体在生长过程中产生的晶格弯曲畸变造成的,与晶体内部片状氮含量无关,辽宁和南非金刚石最大晶格弯曲畸变角分别为1.75°和0.98°。星芒的出现与晶体是否受到熔蚀有密切的关系。辽宁金刚石的星芒像强,晶体受到的熔蚀较弱;南非金刚石的星芒像弱,晶体受到的熔蚀强。
The synchrotron radiation topography and infrared spectroscopy were used to study the characteristics of crystal defects in natural diamonds produced in South Africa and China’s Liaoning Province. The similarities and differences between synchrotron radiation and infrared spectra of diamonds in these two producing areas were analyzed. The reason of the formation of star image is analyzed. It is concluded that the star image is caused by the distortion of the crystal lattice generated during the growth of the crystal, and has nothing to do with the flaky nitrogen content in the crystal. The maximum lattice distortion distortion angle of diamond in Liaoning and South Africa is 1.75 ° and 0.98 °. The emergence of astronomical rays and whether the crystal is closely related to the erosion. Liaoning diamond star like strong, the crystal is subject to the erosion of weak; South African diamond star like weak, strong melt by the crystal.