A lattice dynamical investigation of the Raman and the infrared frequencies of the cubic A2Sn2O7 pyrochlores

被引：53

作者：

Gupta, HC ^{[1
]}

Brown, S

Rani, N

Gohel, VB

机构：

[1] Indian Inst Technol, Dept Phys, New Delhi 110016, India

[2] Gujarat Univ, Phys Dept, Ahmedabad 380009, Gujarat, India

来源：

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2001年 / 3卷 / 07期

关键词：

pyrochlores; Raman and infrared frequencies; A(2)Sn(2)O(7); rare earth stannates;

D O I：

10.1016/S1466-6049(01)00201-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A short range force constant model has been applied for the first time to investigate the Raman and the infrared frequencies in A(2)Sn(2)O(7) (A = La, Sm, Yb, Lu) pyrochlores in their cubic phase of space group Fd3m. The calculations of zone center phonons have been made with six stretching and three bending force constants. The calculated values of Raman and infrared frequencies are in good agreement with the observed ones. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：983 / 986

页数：4

共 5 条

[1] RAMAN-SCATTERING STUDY AND LATTICE-DYNAMICS INVESTIGATION OF THE NAMNF3 PEROVSKITE [J].

DANIEL, P ;

ROUSSEAU, M ;

DESERT, A ;

RATUSZNA, A ;

GANOT, F .

PHYSICAL REVIEW B, 1995, 51 (18) :12337-12346

[2] A lattice dynamical investigation for the zone-centre phonon frequencies of the NaMnF3 perovskite [J].

Gupta, HC ;

Ashdhir, P ;

Rawat, CCS .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1996, 57 (12) :1857-1859

[3] OPTICALLY ACTIVE LATTICE VIBRATIONS AS TREATED BY GF-MATRIX METHOD [J].

SHIMANOUCHI, T ;

TSUBOI, M .

JOURNAL OF CHEMICAL PHYSICS, 1961, 35 (05) :1597-&

[4] OXIDE PYROCHLORES - A REVIEW [J].

SUBRAMANIAN, MA ;

ARAVAMUDAN, G ;

RAO, GVS .

PROGRESS IN SOLID STATE CHEMISTRY, 1983, 15 (02) :55-143

[5] RARE-EARTH TITANATES AND STANNATES OF PYROCHLORE STRUCTURE - VIBRATIONAL-SPECTRA AND FORCE-FIELDS [J].

VANDENBORRE, MT ;

HUSSON, E ;

CHATRY, JP ;

MICHEL, D .

JOURNAL OF RAMAN SPECTROSCOPY, 1983, 14 (02) :63-71

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