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THE ANION GROUPS IN MELTS OF NA2O-SIO2 SYSTEM
Osipov A.A., Osipova L.M., Bykov V.N. (Institute of Mineralogy RAS, Ural Branch, Miass, Russia)
Key words: structure, melt, computer simulation rmik@ilmeny.ac.ru; fax: (35135) 7-02-86; ph.: (35135) 7-04-08

The statistical method of computer simulation grounded on experimental data about a local structure of melts (Qn - distribution) was used. The examination of melts of system Na2O-SiO2 in the range of compositions with the content SiO2 from 40 to 60 mol.% is carried out and the distribution of silicate anions on the sizes and shape is obtained. It is shown, that anion sizes increase at the increasing of the content SiO2 and polymerization of system. The formation of anions with "infinite" size is observed at composition close to metasilicate. It is established, that the main species of silicate groups are the chains. This work was supported by the RFBR (01-03-96467, 01-03-96476).
Electronic Scientific Information Journal "Herald of the Department of Earth Sciences RAS" 1(21)2003 Informational Bulletin of the Annual Seminar of Experimental Mineralogy, Petrology and Geochemistry ­ 2003 URL: http://www.scgis.ru/russian/cp1251/h_dgggms/1-2003/informbul-1_2003/magm-8e.pdf Published on July 15, 2003 © Department of the Earth Sciences RAS, 1997-2003 All rights reserved