In-situ high-temperature Raman spectroscopic studies of aluminosilicate liquids

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Authors:Daniel, I.; Gillet, P.; Poe, B. T.; McMillan, P. F.
Author Affiliations:Primary:
Universite Claude Bernard, Lyon, France
Institut Universitaire de France, France
Universitat Bayreuth, Federal Republic of Germany
Arizona State University, United States
Volume Title:Physics and Chemistry of Minerals
Source:Physics and Chemistry of Minerals, 22(2), p.74-86. Publisher: Springer-Verlag, Berlin-New York, Federal Republic of Germany. ISSN: 0342-1791
Publication Date:1995
Note:In English. 67 refs.; illus.
Summary:Raman spectra of aluminosilicate glasses and liquids with albite and anorthite compositions have been measured at high T, through their glass transition range up to 1700 and 2000 K, respectively. A methodology is developed for reliability extracting the first and second order contributions to the Raman scattering spectra of aluminosilicate glasses and liquids from the high-T experimental data, and analysing these in terms of vibrational (anharmonic) and configurational changes. The principal low frequency band remains nearly constant with increasing T, indicating little change in the T-O-T angle, in contrast to previous results in vitreous SiO2. Above Tg, intensity changes in the 560-590 cm-1 regions of both sets of spectra indicate configurational changes in the supercooled liquids, associated with formation of additional Al-O-Al linkages, or 3-membered (Al,Si)-containing rings. Additional intensity at 800 cm-1 reflects some additional rearrangement of the Si-O-Al network. - S. [A.T.R.]
Subjects:Albite; Aluminosilicates; Anorthite; Feldspar group; Framework silicates; High temperature; Methods; Plagioclase; Raman spectra; Raman spectroscopy; Silicates; Spectra; Spectroscopy; Temperature
Abstract Numbers:96M/2994
Record ID:1995032478
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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