Investigation into the Mechanism of Interaction of Calcium and Magnesium Silicates with Carbon Dioxide in the Course of Mechanical Activation |
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| Authors: | A. M. Kalinkin V. V. Boldyrev A. A. Politov E. V. Kalinkina V. N. Makarov V. T. Kalinnikov |
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| Affiliation: | (1) Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center, Russian Academy of Sciences, ul. Fersmana 14, Apatity, Murmansk oblast, 184209, Russia;(2) Institute of Solid-State Chemistry and Mechanochemistry, Siberian Division, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128, Russia |
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| Abstract: | A prolonged grinding of diopside, akermanite, sphene, wollastonite, and enstatite is accompanied by absorption of CO2 from the environment (carbonation) along with amorphization and hydration. The IR spectra of ground minerals contain bands of distorted carbonate groups due to absorption of carbon dioxide. If the mechanical activation is not attended by the distortion of the crystal lattice, the sorption of carbon dioxide results in the formation of undistorted [CO32–] groups. |
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