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    钠离子对于海洋成因10Å-水锰矿结构稳定性的影响

    姜学钧 姚德 林学辉

    姜学钧, 姚德, 林学辉, 2009. 钠离子对于海洋成因10Å-水锰矿结构稳定性的影响. 地球科学, 34(3): 392-398.
    引用本文: 姜学钧, 姚德, 林学辉, 2009. 钠离子对于海洋成因10Å-水锰矿结构稳定性的影响. 地球科学, 34(3): 392-398.
    JIANG Xue-jun, YAO De, LIN Xue-hui, 2009. Role of Sodium Ion on Stability of the Crystal Structure of Marine 10Å-Manganates. Earth Science, 34(3): 392-398.
    Citation: JIANG Xue-jun, YAO De, LIN Xue-hui, 2009. Role of Sodium Ion on Stability of the Crystal Structure of Marine 10Å-Manganates. Earth Science, 34(3): 392-398.

    钠离子对于海洋成因10Å-水锰矿结构稳定性的影响

    基金项目: 

    国家自然科学基金项目 40076015

    中国大洋协会项目 DY105-01-03-03

    详细信息
      作者简介:

      姜学钧(1969-)‚男‚博士‚副研究员‚主要从事矿物学和地球化学研究.E-mail: jiangxj_qimg@yahoo.com.cn

    • 中图分类号: P591; P618

    Role of Sodium Ion on Stability of the Crystal Structure of Marine 10Å-Manganates

    • 摘要: 10Å-水锰矿是海洋成岩型铁锰结核和很多陆生锰矿的主要矿物, 铜、镍等过渡金属元素对于10Å-水锰矿结构的稳定起着重要的作用, 而对于碱金属元素钠离子在其中的地球化学行为则少有涉及.利用取自东太平洋海底的成岩型铁锰结核, 借助化学方法, 利用矿物学和晶体化学的理论对碱金属元素钠离子在成岩型铁锰结核中的存在状态以及对结核组成矿物10Å-水锰矿结构的影响进行了研究.结果显示, 10Å-水锰矿中钠离子可以被弱酸析出并且会导致其结构的破坏, 使得10Å-水锰矿转换成7-水锰矿; 析出钠离子并且结晶状态变差的10Å-水锰矿吸附钠离子后, 其结晶状态可明显好转并且部分非10相转化为10Å-水锰矿, 但是这种结构的破坏在自然条件下不能完全恢复.因此, 钠离子对于10Å-水锰矿结构的稳定性起着非常重要的作用.

       

    • 图  1  成岩型结核全样和分层样品的X射线衍射图谱

      Fig.  1.  The powder XRD patterns of the diagenetic nodule and the subsamples

      图  2  样品ET0302-3在热处理前和热处理后的X-射线術射图谱

      Fig.  2.  The XRD patterns of sample ET0302-3

      图  3  样品在经过选择性提取以后的X-射线衍射图谱

      Fig.  3.  Powder XRD patterns of the subsamples after the selective dissolution experiments

      图  4  选择性提取的样品吸附钠离子后的X-射线衍射图谱

      Fig.  4.  XRD patterns of the subsamples that adsorbed Na+ after the selective dissolution experiments

      图  5  10Å-水锰矿的晶体结构

      Fig.  5.  Crystal structure of the 10Å-manganates

      表  1  成岩型结核全样和分层样品的常量、微量元素的化学分析结果(%)

      Table  1.   Concentrations of the major and minor elements of the diagenetic nodule and the subsamples

      表  2  成岩型结核分层样品的选择性提取结果(10-6)

      Table  2.   The selective dissolution experiment results of the subsamples of the diagenetic nodule

      表  3  样品在处理前后10Å、5Å衍射峰和7Å衍射峰的积分面积比值

      Table  3.   Ratios of the integral area of the peaks of 10Å and 5Å of 10Å-manganates to the 7Å of 7Å-manganates before and after the chemical treatments

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    出版历程
    • 收稿日期:  2008-12-01
    • 刊出日期:  2009-05-25

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