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    Ⅰa型褐色金刚石结构缺陷的同步辐射白光形貌特征

    陈美华 陈征 狄敬如 路凤香 巫翔

    陈美华, 陈征, 狄敬如, 路凤香, 巫翔, 2005. Ⅰa型褐色金刚石结构缺陷的同步辐射白光形貌特征. 地球科学, 30(2): 187-190.
    引用本文: 陈美华, 陈征, 狄敬如, 路凤香, 巫翔, 2005. Ⅰa型褐色金刚石结构缺陷的同步辐射白光形貌特征. 地球科学, 30(2): 187-190.
    CHEN Mei-hua, CHEN Zheng, DI Jing-ru, LU Feng-xiang, WU Xiang, 2005. Structure Defects in Type Ⅰa Brown Diamonds by Polychromatic Synchrotron Radiation Topography. Earth Science, 30(2): 187-190.
    Citation: CHEN Mei-hua, CHEN Zheng, DI Jing-ru, LU Feng-xiang, WU Xiang, 2005. Structure Defects in Type Ⅰa Brown Diamonds by Polychromatic Synchrotron Radiation Topography. Earth Science, 30(2): 187-190.

    Ⅰa型褐色金刚石结构缺陷的同步辐射白光形貌特征

    基金项目: 

    国家自然科学基金项目 40272021

    详细信息
      作者简介:

      陈美华(1966-), 男, 副教授, 现主要从事金刚石结构、物化性质、处理方法和找矿方向的研究. E-mail: mhchen@cug.edu.cn

    • 中图分类号: P619.24

    Structure Defects in Type Ⅰa Brown Diamonds by Polychromatic Synchrotron Radiation Topography

    • 摘要: 同步辐射白光形貌术具有射线强度大、准直性好、摄谱时间短、分辨率高等特点, 是无损研究晶体缺陷的有效工具.采用该方法对产自山东蒙阴、辽宁瓦房店和湖南沅江3个矿区的31颗典型金刚石样品进行了研究.白光形貌像揭示, 金刚石中普遍存在晶体结构畸变的特征, 并且变形程度不等, 部分严重变形晶体具有异常劳埃衍射式样; 其衍射斑点的形态、衬度及条纹变化反映了金刚石晶体结构变形的程度和复杂性.晶格的完整性与金刚石的褐色强度无明显相关性.该类结构缺陷与金刚石的复杂形成过程和深部保存条件有关.

       

    • 图  1  (a) 样品HD547的衍射斑点衬度均一; (b) 样品LW8的衍射斑点放大像中的位错; (c) 样品HD501的劳埃衍射图

      Fig.  1.  (a) Even contrast in the spot of Laue pattern in HD547; (b) Dislocations shown in the spot of Laue pattern in LW8; (c) Strong asterism of Laue pattern in HD501

      图  2  (a) 样品SM301显示两组交叉变形带; (b) 平行位错的同步辐射白光衍射斑点放大像; (c) 样品SM301的劳埃衍射图

      Fig.  2.  (a) Cross strip of deformation shown in the spot of Lane pattern in SM301; (b) Parallel dislocations in the spot of Lane pattern in SM301; (c) Laue pattern in SM301

      图  3  样品SM372的衍射斑点明显拉长

      Fig.  3.  Stretch of the spot in Laue pattern of SM372

      图  4  样品SM337的衍射斑点呈破碎状

      Fig.  4.  Fragmentation spot in Laue pattern of SM337

      表  1  测试样品的特征和类型

      Table  1.   Characteristics and types of diamond samples

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    出版历程
    • 收稿日期:  2004-05-02
    • 网络出版日期:  2022-06-22
    • 刊出日期:  2005-03-25

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