Infrared and Raman spectroscopy studies of the α–β phase transition in cristobalite

Infrared and Raman spectra of cristobalite are presented as a function of temperature through the phase transition. The modes are assigned and the assignments compared to those of earlier workers. The compatibility of modes at the Γ-point of the α-phase with the X and Γ-points of the β-phase is give...

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Bibliographic Details
Published in:Physics and chemistry of minerals 2003-07, Vol.30 (6), p.353-365
Main Authors: Swainson, I P, Dove, M T, Palmer, D C
Format: Article
Language:English
Subjects:
Beta phase
Cristobalite
Infrared spectra
Phase transitions
Raman spectra
Raman spectroscopy
Spectrum analysis
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Summary:Infrared and Raman spectra of cristobalite are presented as a function of temperature through the phase transition. The modes are assigned and the assignments compared to those of earlier workers. The compatibility of modes at the Γ-point of the α-phase with the X and Γ-points of the β-phase is given. In the transition region of ca. 500–550 K, smooth changes in intensity, frequency and linewidths are seen in many modes, indicative of coexistence of α- and β-forms.
ISSN:0342-1791
1432-2021
DOI:10.1007/s00269-003-0320-8