| 天然金刚石同生位错的同步辐射X射线貌相研究 |
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| 引用本文： | 于万里,郑秋菊,田玉莲,黄万霞.天然金刚石同生位错的同步辐射X射线貌相研究[J].矿物学报,2002,22(3):196-200. |
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| 作者姓名： | 于万里 郑秋菊 田玉莲 黄万霞 |
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| 作者单位： | 1. 燕山大学,材料科学与工程学院,河北,秦皇岛,066004
2. 中国科学院,高能物理研究所,北京,100039 |
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| 基金项目： | 北京正负电子对撞机国家实验室重点课题基金项目，燕山大学博士基金项目 |
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| 摘 要： | 利用同步辐射白光透射貌相术研究了辽南天然金刚石的晶体缺陷。采用作者提出的计算晶体缺陷空间取向的方法计算了金刚石中位错的取向。晶体中所有位错均起源于晶核，并且柏氏矢量都平行于1^-01]。多数位错并非位于{111}面内。位错所在晶面属于1^-01]晶带，并且多数与{211}或{110}面近于平行。位错线平直，部分有拐折。所有位错均为混合位错。位错走向与生长面近于垂直，多数与＜111＞夹角较小。所有位错均为同生位错，形成后未发生滑移。晶核在形成期曾受到较大应力作用造成较大的晶格畸变。晶体内部未出现生长带，反映晶体成长过程中环境未发生大的变化。形成晶体的碳质来源不均一，反映了中元古代华北陆台下地壳岩浆成分的不均一性。
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| 关 键 词： | 位错 同步辐射 金刚石 晶体缺陷 应力作用 晶核 |
| 文章编号： | 1000-4734(2002)03-0196-05 |
| 修稿时间： | 2002年1月12日 |
THE SYNCHROTRON RADIATION TOPOGRAPHIC FEATURES OF GROWN-IN DISLOCATIONS IN NATURAL DIAMOND |
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| Yu Wanli,Zheng Qiuju,Tian Yulian,Huang Wanxia.THE SYNCHROTRON RADIATION TOPOGRAPHIC FEATURES OF GROWN-IN DISLOCATIONS IN NATURAL DIAMOND[J].Acta Mineralogica Sinica,2002,22(3):196-200. |
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| Authors: | Yu Wanli Zheng Qiuju Tian Yulian Huang Wanxia |
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| Institution: | Yu Wanli 1 Zheng Qiuju 1 Tian Yulian 2 Huang Wanxia 2 |
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| Abstract: | Diamond from Liaoning, China, was examined by white light synchrotron radiation. The distribution of dislocations in the specimen has been revealed. The orientation of crystal defects has been calculated using the method proposed by the author previously. All the dislocations are originated from the core of the crystal, which is not situated at the geometrical center. The Burgers vector of all the dislocations runs parallel with 01]. It has been found that most of the dislocations in the specimen are near but not precisely parallel to {111} planes but the planes they lie are parallel to . It has been found that most of the dislocations in the specimen are near but not precisely parallel to {111} planes but the planes they lie are parallel to 01]. The majority of the dislocations are nearly parallel to {211} or {110}. Most of the dislocations are straight except a few that changed their directions abruptly. The dislocations are composite since the angles between Burgers vector and dislocation lines vary within 21 to 86 degrees. The dislocations run approximately vertical to the growing planes and most of them have a small angle with <111>. All the dislocations are of the grown in type and no slipping happened after they were formed. The crystal suffered a violent stress when the core was formed and aberrance was induced to the core. The growing condition didn't change obviously since no growing band was found within the crystal. Heterogenity of the carbon source implies the magma beneath the North China platform was not homogeneous at Late Mesoproterozoic. . The majority of the dislocations are nearly parallel to {211} or {110}. Most of the dislocations are straight except a few that changed their directions abruptly. The dislocations are composite since the angles between Burgers vector and dislocation lines vary within 21 to 86 degrees. The dislocations run approximately vertical to the growing planes and most of them have a small angle with <111>. All the dislocations are of the grown in type and no slipping happened after they were formed. The crystal suffered a violent stress when the core was formed and aberrance was induced to the core. The growing condition didn't change obviously since no growing band was found within the crystal. Heterogenity of the carbon source implies the magma beneath the North China platform was not homogeneous at Late Mesoproterozoic. |
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| Keywords: | dislocation synchrotron radiation diamond |
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