gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1980.043.330.16 Short Communications Rapidly Quenched KAlSi₃O₈-NaAlSi₃O₈ Glasses Jantzen C. M. Rockwell International Science Center, 1049 Camino Dos Rios, P.O. Box 1085, Thousand Oaks, Ca. 91360, U.S.A. 6 1980 43 330 809 811 8 10 1979 4 2 1980 Copyright © 1980, The Mineralogical Society 1980