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  • 1 Department of Inorganic Chemistry, Faculty of Natural Sciences Comenius University Mlynská dolina 842 15 Bratislava
  • | 2 Geological Institute, Faculty of Natural Sciences Comenius University Zadunajská 15 851 01 Bratislava Czechoslovakia
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The high-temperature (950–1500°) changes in synthetic montmorillonite of relatively simple chemical composition, studied by X-ray diffraction analysis, infrared spectroscopy and electron microscopy, are described. It was found that this montmorillonite belongs to the Wyoming type and the high-temperature phases involve cristobalite, mullite, anorthite and spinel. Only mullite crystallized from this sample on heating for two hours at 1500°.

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