TEXT Nailia R. Rakhimova1, Ravil Z. Rakhimov2, Vladimir P. Morozov3, Alfiya M. Gubaidullina4, Natalia I. Naumkina4, Yury N. Osin5
1Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City/Vietnam ()
2Department of Building Materials, Kazan State University of Architecture and Engineering, Kazan/Russian Federation
3Department of Mineralogy and Lithology, Kazan Federal University, Kazan/Russian Federation
4Central Research Institute for Geology of Industrial Minerals, Kazan/Russian Federation
5Interdisciplinary Center for Analytical Microscopy, Kazan Federal University, Kazan/Russian Federation
