Mineralization models fluoride studies

In 1963 Dr. Danbk joined the Institute of Inorganic Chemistry of the Slovak Academy of Sciences in Bratislava, of which he was the director in the period 1991-1995. His main field of interest was the physical chemistry of molten salts systems in particular the study of the relations between the composition, properties, and structure of inorganic melts. He developed a method to measure the electrical conductivity of molten fluorides. He proposed the thermodynamic model of silicate melts and applied it to a number of two- and three-component silicate systems. He also developed the dissociation model of molten salts mixtures and applied it to different types of inorganic systems. More recently his work was in the field of chemical synthesis of double oxides from fused salts and the investigation of the physicochemical properties of molten systems of interest as electrolytes for the electrochemical deposition of metals from natural minerals, molybdenum, the synthesis of transition metal borides, and for aluminium production. 

Oxides of the early d-block metals can also be grown hydrothermally, and this work is beginning to attract more attention due to the importance of these materials in a variety of technical applications [62]. In contrast to the later transition metals, the crystals of Group IV oxides are often best grown using fluoride as the mineralizer [63,64]. A number of these systems have been studied in detail and some elegant theoretical models have been developed for their phase stability [65]. 

The adsorption maximum at pH 9-10 has been seen by others [26] as reflecting the first of silicic acid (pA l = 9.45 at 25°C), although it has been argued by different workers that this maximum in turn was an indication that SiO(OH)J adsorbed alone [29] or that Si(OH)4 and SiO(OH)J adsorbed concurrently [26]. Early modeling studies [26,28] related silica adsorption to exchange with substrate surface hydroxyl groups, although clearly this situation would not be the case for adsorption on fluoride minerals. Davis and Leckie... 

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