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

被引：25
|
作者：
Jeghnou, H [1 ]
Ouasri, A
Rhandour, A
Dhamelincourt, MC
Dhamelincourt, P
Mazzah, A
机构：
[1] Fac Sci, Lab Physicochim Mat Inorgan, Kenitra, Morocco
[2] Univ Sci & Tech Lille Flandres Artois, Lab Spectrochim Infrarouge & Raman, UMR CNRS 8516, Ctr Etud & Rech Lasers & Applicat, F-59655 Villeneuve Dascq, France
来源：
JOURNAL OF RAMAN SPECTROSCOPY | 2003年 / 34卷 / 02期
关键词：
butylammonium hexafluorosilicate; phase transition; x-ray; density; differential scanning calorimetry; Raman spectroscopy;
D O I：
10.1002/jrs.964
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Butylammonium hexafluorosilicate, (n-C4H9NH3)(2)SiF6, 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 (nC(4)H(9)NH(3))(2)SiF6 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 (C) 2003 John Wiley Sons, Ltd.
引用
收藏
页码：126 / 130
页数：5
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