| 羟氯镁铝石的高分辨透射电镜观察
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| 引用本文： | 秦善,曹正民.羟氯镁铝石的高分辨透射电镜观察
[J].地球科学,1998,23(3):78. |
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| 作者姓名： | 秦善 曹正民 |
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| 作者单位： | 北京大学地质学系 |
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| 摘 要： | 羟氯镁铝石（ｋｏｅｎｅｎｉｔｅ）为典型的异类结构基元层间层矿物．结构以氯化物层（Ｎａ，Ｍｇ）Ｃｌ２和氢氧化物层（Ｍｇ，Ａｌ）（ＯＨ）２沿ｃ方向规则交互构成．以前的研究认为构成羟氯镁铝石的两个亚结构有不同的空间群和晶胞参数．本次以高分辨透射电子显微镜的研究结果表明，羟氯镁铝石在ｃ方向的重复周期为１．０８ｎｍ左右，在ａ方向上没有显示出层失配特点，说明它是一种有序的晶体．对结构基元层层间的静电作用势能的定量计算表明，层间作用力相对较弱，为１０４．９０ｋＪ／ｍｏｌ．
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| 关 键 词： | 羟氯镁铝石，晶体结构，透射电镜 |
HRTEM OBSERVATIONS ON
KOENENITE |
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| Qin Shan.HRTEM OBSERVATIONS ON
KOENENITE[J].Earth Science-Journal of China University of Geosciences,1998,23(3):78. |
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| Authors: | Qin Shan |
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| Abstract: | Previous studies on koenenite, an unusual interstratified mineral, proposed that koenenite is built up of two trigonal substructures with different space groups and cell parameters. However, HRTEM study shows that along c _axis koenenite represents a clear 1.08nm reflection, without mismatch in a _direction, indicating a periodic structure. The potential energy of the electrostatic interaction between chloride and hydroxide layers is weaker, just 104.90kJ/mol shown by the quantitatively calculated result. |
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| Keywords: | koenenite crystal structure transmission electron microscope |
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