%I Department of Mineralogy, Geochemistry and Petrology, University of Szeged %V 2 %J Acta mineralogica-petrographica %L acta31457 %T The silica under-saturated part of the system NaAlSiO4-SiO2 AT 1 ATM. preliminary data on the effects of fluorine %A Fedele L. %A Webster J. %A De Vivo B. %A BodnĂĄr R. J. %K FĂśldtan, ĂsvĂĄnytan, KĹzettan %P 65-66 %D 2003 %C Szeged %O Bibliogr.: 66. p. ; ill.