DISTINCTION BETWEEN KAOLINITE AND CHLORITE IN RECENT SEDIMENTS BY X-RAY DIFFRACTION
DISTINCTION BETWEEN KAOLINITE AND CHLORITE IN RECENT SEDIMENTS BY X-RAY DIFFRACTION
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发表时间：
2007
影响因子：
5.2
通讯作者：
Department oJ Geology Prnnnn E. Brsceve;Yale Jniversily;Connecticut.l H aven;Ansrnacr
中科院分区：
文献类型：
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作者：
Department oJ Geology Prnnnn E. Brsceve;Yale Jniversily;Connecticut.l H aven;Ansrnacr
在对大西洋、南极和西印度洋的现代深海沉积物的研究中，通常通过分别分辨高岭石和高岭石在3.5A处的第二级和第四级基础r射线衍射峰来区分它们。这种区别已被证实在这些沉积物的相对强度的所有低阶高岭石和高岭石基底反射，它们的d间距，它们的反应，热HCl处理和乙酸钾和硝酸铵的intersaltation治疗。该方法简单，仅涉及r-射线衍射条件的微小变化，并且不需要对样品进行化学或热处理。然而，3.5A峰的分辨率应与通常的衍射扫描结合使用，以便检测可能在3.5A区域产生其他峰的不同化学组成的其他矿物或绿泥石，并通过该方法消除或排除高岭石-方解石的区分。
In a study of Recent deep-sea sediments from the Atlantic, Antarctic and western Indian Oceans, kaolinite and chlorite have been routinely differentiated by resolving, respectively, their second and fourth order basal r-ray diffraction peaks at 3.5 A. This distinction has been confirmed in these sediments by the relative intensities of all the low-order kaolinite and chlorite basal reflections, their d spacings, their reaction to hot HCI treatment and to potassium acetate and ammonium nitrate intersaltation treatments. The method is simple, involves only minor changes in r-ray diffraction conditions and requires no chemical or thermal treatment of the sample. However, resolution of the 3.5 A peaks should be used in conjunction with the usual diffraction scan in order to detect other minerals or chlorites of difierent chemical comoositions which mav contribute other oeaks in the 3.5 A region and ohscure or preclude kaolinite-chlorite distinciion by this method.