Polymerization of silicate and aluminate tetrahedra in glasses, melts, and aqueous solutions--V. The polymeric structure of silica in albite and anorthite composition glass and the devitrification of amorphous anorthite

Details Polymerization of silicate and aluminate tetrahedra in glasses, melts, and aqueous solutions--V. The polymeric structure of silica in albite and anorthite composition glass and the devitrification of amorphous anorthite Polymerization of silicate and aluminate tetrahedra in glasses, melts, and aqueous solutions--V. The polymeric structure of silica in albite and anorthite composition glass and the devitrification of amorphous anorthite

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.2619d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 48, Issue 12, pp.2619-2629

Computer Science

Scientific paper

29 Si MAS NMR experiments have been carried out to determine the silica species distribution (Q distribution) in albite, NaAlSi 3 O 8 , and anorthite, CaAl 2 Si 2 O 8 , composition glasses (designated albite and anorthite glass). Our results indicate that the Q distribution of albite glass contains all five possible silica species and shows a tendency towards high Q 3 and Q 4 concentrations, whereas anorthite glass does not contain Q 4 and has a high Q 0 concentration. Rationalizations are made in terms of the observed Q distributions to explain differences in devitrification behavior of these two glasses. 27 Al MAS NMR data for these glasses suggest that differences in devitrification behavior between these two glasses should be ascribed to small growth rates rather than small nucleation rates of crystalline albite from albite glass.

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