Structural phase transitions in[C6H5NH3]2SiF6:: differential scanning calorimetry and Raman studies

被引：13

作者：

Jeghnou, H

Ouasri, A

Rhandour, A ^{[1
]}

Dhamelincourt, MC

Dhamelincourt, P

Mazzah, A

机构：

[1] Fac Sci, Lab Physicochim Mat Inorgan, Kenitra, Morocco

[2] Univ Sci & Technol Lille, 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 / 06期

关键词：

phenylammonium hexafluorosilicate; structural phase transitions; differential scanning calorimetry; Raman spectroscopy; X-ray diffraction; density;

D O I：

10.1002/jrs.1008

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Phenylammonium hexafluorosilicate, [C6H5NH3](2)SiF6, crystallizes at room temperature in the orthorhombic system with probable space group Pmmm. Two structural phase transitions were detected at 226 and 280 K by means of differential scanning calorimetry and basic thermodynamic data were determined for these transitions. The internal vibrational modes Of [C6H5NH3](2)SiF6 were studied at room temperature and through the phase transitions by using Raman spectroscopy. These studies indicate that the vibrational state of the phenyl cations is weakly changed during these two phase transitions. Copyright (C) 2003 John Wiley Sons, Ltd.

引用

页码：399 / 403

页数：5

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