A spectroscopic investigation of anhydrous KAlSi3O8 and NaAlSi3O8 glasses quenched from high pressure

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doi: 10.1016/0016-7037(93)90111-9
Authors:Sykes, Dan; Poe, Brent T.; McMillan, Paul F.; Luth, Robert W.; Sato, Robert K.
Author Affiliations:Primary:
University of Alberta, Department of Geology, Edmonton, AB, Canada
Other:
Arizona State University, United States
Volume Title:Geochimica et Cosmochimica Acta
Source:Geochimica et Cosmochimica Acta, 57(8), p.1753-1759. Publisher: Pergamon, Oxford, International. ISSN: 0016-7037
Publication Date:1993
Note:In English. 41 refs.; illus.
Summary:Using 27Al MAS NMR, Raman and IR spectroscopy of anhydrous orthoclase and albite glasses quenched from up to 10 GPa, no clear evidence was found for high-coordinate Al or Si. The similarity of the 27Al MAS NMR spectra of both glasses suggests that their structures behave consistently with increasing P. The effect of P is to reduce the distribution of T-O-T bond angles about the mean T-O-T angle by reaction of Si-O-Si with Al-O-Al linkages to form Si-O-Al links or by a more general mechanism of elastic collapse of the random network. [R.K.H.]
Subjects:Aluminosilicates; Aluminum; High pressure; Infrared spectra; Melts; Metals; Pressure; Raman spectra; Silicates; Spectra
Abstract Numbers:94M/125
Record ID:1993010729
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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