NQR Investigation of Phase Transitions in Cesium Plumbochloride

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Chlorine NQR and Phase Transitions in NOC1*

Nitrosyl chloride NOC1 has previously mainly been studied in the gaseous state by different methods, e. g. the microwave technique [1, 2]. It is suitable as a model compound for studying the N 0 and N-Cl chemical bonding. The gas phase investigations indicate a considerable degree of ionic character of the N-Cl bond [3]. Vibrational spectra in the solid [4, 5] show an even increased ionicity. a...

متن کامل

NQR Studies of Phase Transitions and Intermolecular Interactions in Crystals*

Simple methods to analyze the anomalous behavior o f NQ R parameters are presented. Unusual positive temperature coefficients o f antimony resonance frequencies in (N H 4)2SbF5 below the phase transition at 169 K were interpreted in terms o f ordering processes o f the ammonium ions. Calculation o f the EFG in LaF3 revealed that the translational diffusion of Li ions brings about an anomalous d...

متن کامل

NQR and Phase Transitions in CH3NH3HgBr3 and CH3NH3HgI3*

The Br and 1 2 I NQR spectra were recorded in CH 3 NH 3 HgBr 3 and CH 3 NH 3 HgI 3 , respectively. In addition to a phase transition at 338 K, successive phase transitions take place at 127 + 1, 184 + 1, and 243±5 K in CH 3 NH 3 HgBr 3 . On heating, the resonance lines of CH 3 NH 3 HgI 3 disappear near a phase transition at 328 K and one line appears above this temperature. The temperature vari...

متن کامل

NQR Pressure Studies of Molecular Dynamics and Phase Transitions

High pressure technique applied in studies of NQR frequency and quadrupole relaxation has been used for deriving information on the dynamical properties of crystals and the nature of their phase transitions. The ^Cl NQR pressure studies have been carried out and a detailed analysis is given for the following topics: 1) Symmetric and asymmetric hydrogen bonded systems under high pressure. 2) NQR...

متن کامل

Iodine NQR and Phase Transitions in [N(CH3)4]2ZnI4*

Using a superregenerative NQR spectrometer, the temperature dependence of I NQR spectra in [N(CH3)4]2ZnI4 was measured between 167 and 335 K. The measurements confirm two known structural phase transitions at 219 and 257.5 K. The correspondence between the distinct regions of iodine NQR spectra and the crystal structure is discussed. The relation of [N(CH3)4]2ZnI4 to the incommensurate family w...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Journal of Chemical Physics

سال: 1969

ISSN: 0021-9606,1089-7690

DOI: 10.1063/1.1670853