STRUCTURE AND SORPTION PROPERTIES OF WEATHERED MICROCLINE CRYSTALS FROM GLUKHOVETSKY DEPOSIT

DC 549.546.623.91

https://doi.org/10.15407/mineraljournal.38.04.039

A.M. Rozko (1), Yu.G. Fedorenko (2)
(1) M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine
34, Acad. Palladin Av., Kyiv-142, Ukraine, 03680
E-mail: al.rozko@gmail.com
(2) SE "Institute of Environmental Geochemistry of the NAS of Ukraine"
34-a, Acad. Palladin Av., Kyiv-142, Ukraine, 03680
STRUCTURE AND SORPTION PROPERTIES OF WEATHERED MICROCLINE CRYSTALS FROM GLUKHOVETSKY DEPOSIT
Language: Ukrainian
Mineralogical journal 2016, 38 (4): 39-44

Abstract: The Glukhovetsky alkaline kaolins were formed as a result of slow weathering of potash feldspars (microcline-pertites) in the mother rock. Examination of the weathered microcline samples from the deposit’s pegmatoid zones has shown the gradual development of parallel striations, which at later stages of weathering cause foliation of the crystals into separate blades surrounded by newly formed kaolin crystals, having no certain preferred orientation. A series of samples contains roentgen-amorphous fine-dispersed formations. The presence of the sufficient number of intermediate crystalline phases during the weathering was not detected by X-ray phase analysis. Such structure of the microcline samples indicates that they apparently contain the sufficient number of uncompensated bonds, micro-defects and finely dispersed formations which increase their sorption properties. The experiments showed that the distribution coefficients of 90Sr for the weathered microcline are 2—3 times higher than those for kaolinite and primary microcline.

Keywords: weathered, sorption, alkaline kaolins, feldspars, microcline, kaolins.

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