Change in structure and enthalpy of magnesite accompanying grinding in aerial and aqueous environment

Abstract The Influence of aqueous medium on the change in enthalpy and structure of magnesite has been investigated. The determination of the increase in enthalpy by the method of dissolution heats as well as the study of structural transformations by the X-ray diffraction and EPR-method has shown that the energetic excitation of the structure in the process of its destruction proceeds with equal intensity in the course of grinding in aqueous and aerial media. The dispergation effect of grinding is, however, superimposed in aerial medium by aggregation owing to which a part of now arising surface becomes inaccessible to the determination by the adsorption method.