Abstract
Microporous framework aluminosilicates with the cancrinite- and sodalite-type structures containing NO3−, CO32−, SO42− and PO43−, as extra-framework anions were synthesized under hydrothermal conditions at temperatures from 160 to 200°C. SO42− exhibits the highest affinity to cancrinite structure at the competition of various X anions. Chemical composition, X-ray diffractometry characteristics, and IR spectra of the compounds obtained, as well as kinetics and mechanism of thermal transformations of nitrate counterpart of cancrinite, were studied.
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