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A series of germanates with olivine structure: Me2GeO4 (Me=Mg, Ca); Li2MeGeO4 (Me=Mg, Zn); LiMeGeO4 (Me=Sc, In, Y), and the compound Li4GeO4 were obtained by solid-state synthesis. Their thermal behavior was studied from the viewpoint of the possibilities of growing single crystals as matrices doped with Cr4+ for lasers. By means of X-ray and DTA/TG analysis data are obtained about the melting temperatures,...
The construction of calorimetric ampoules for work in hydrothermal conditions makes it possible to investigate the enthalpy of mineral crystallization. The potential of the equipment is demonstrated for the case of zeolite synthesis from glasses. Two synthetic Na- and Na--K-glasses, and dacite pumice were used as starting materials. Aqueous solutions of 2 N and 6 N NaOH and KOH were prepared. ...
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