Structural phase transition in (n-C4H9NH3)2SiF6: DSC and Raman studies

Butylammonium hexafluorosilicate, (n‐C4H9NH3)2SiF6, crystallizes at room temperature in the trigonal system with a probable space group P321. A new structural phase transition was detected at low temperatures for this compound by means of differential scanning calorimetry (DSC) and the basic thermod...

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Bibliographic Details
Published in:Journal of Raman spectroscopy 2003-02, Vol.34 (2), p.126-130
Main Authors: Jeghnou, H., Ouasri, A., Rhandour, A., Dhamelincourt, M.-C., Dhamelincourt, P., Mazzah, A.
Format: Article
Language:English
Subjects:
Ambient temperature
butylammonium hexafluorosilicate
Crystallization
density
Differential scanning calorimetry
Dynamical systems
Dynamics
Phase transformations
phase transition
Raman spectroscopy
Thermodynamics
x-ray
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Summary:Butylammonium hexafluorosilicate, (n‐C4H9NH3)2SiF6, crystallizes at room temperature in the trigonal system with a probable space group P321. A new structural phase transition was detected at low temperatures for this compound by means of differential scanning calorimetry (DSC) and the basic thermodynamic data for this transition were determined. The internal vibrational modes of (n‐C4H9NH3)2SiF6 were studied at ambient temperature and as a function of the temperature, through the phase transition, by means of Raman spectroscopy. The observed phase transition is associated with the dynamics of the system and is of the order–disorder type. Copyright © 2003 John Wiley & Sons, Ltd.
ISSN:0377-0486
1097-4555
DOI:10.1002/jrs.964