【摘要】 利用EPR检测了200多颗湖南砂矿金刚石。为53颗晶体测定了顺磁N的含量。阐明了砂矿金刚石中顺磁N分配的一般特点:具顺磁N信号者占30％,具较大顺磁N含量(10¹⁷—10¹⁸N原子/cm³)者只占7％,属I_b型的晶体～2％。通过顺磋和红外光谱资料对比,发现了一些奇异现象,设想后者起因于混型晶的存在。为使金刚石正确归类,给出了一套测试方案,强调了紫外、红外光谱,紫外形貌照相和EPR等手段的联合使用。更多还原

【Abstract】 More than 200 natural diamonds from Hunan Province were examined bymeans of EPR. Content of paramagnetic nitrogen was determined for 53 di-amond crystals. 30% of the examined crystals show paramagnetic nitrogen-signal, among which 7% indicate relatively high concentrations and 2% belongto Ib type. Unexpected phenomena, which may be attributed to the existenceof mixed-type diamond, have been recognized by comparing EPR with infr-ared data. A programme is given for the correct classification of diamondbased on violet-infrared spectroscopy, violet morphology and EPR.更多还原