Structure and characterization of a mixed crystal Rb2SO4.Te(OH)6

被引：37

作者：

Dammak, M ^{[1
]}

Khemakhem, H ^{[1
]}

Mhiri, T ^{[1
]}

Kolsi, AW ^{[1
]}

Daoud, A ^{[1
]}

机构：

[1] Fac Sci Sfax, Lab Etat Solide, Sfax 3038, Tunisia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1998年 / 280卷 / 1-2期

关键词：

rubidium sulfate tellurate; characterization; crystal structure determination; Raman spectra; IR spectra;

D O I：

10.1016/S0925-8388(98)00707-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Rb2SO4.Te(OH)(6) mixed crystals (RTMC) crystallizes in the monoclinic system with space group P2(1)/a and cell parameters: a=11.454(5) Angstrom, b=6.658(4) Angstrom, c = 13.636(4) Angstrom, beta = 107.08 degrees(2), V=994.03(4) Angstrom(3), Z=4, D-x=2.918 g cm(-3). F(0 0 0)=912, T=298(2) K (room temperature phase), R=0.036 and WR=0.0860 for 1278 observed reflections. The significance of this structure is the presence of both SO42- and TeO66- anions in the same crystal. Differential scanning calorimetry traces show three anomalies at about 414 K, 424 K and 495 K characterizing the three phase transitions in this material. Raman and IR spectra of Rb2SO4.Te(OH)(6) mixed crystals (RTMC) recorded at room temperature in the frequency range 10-4000 cm(-1), show that the two different anions SO42- and TeO66- coexist in the crystal independently. The bands are in agreement with the monoclinic room temperature phase. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：107 / 113

页数：7

共 15 条

[1] STRUCTURE OF RBHSO4 IN ITS PARAELECTRIC PHASE [J].