Structural, thermal and dielectric studies in Na2SeO4•Te(OH)6•H2O

被引：13
|
作者：
Dammak, M. [1 ]
Litaiem, H. [1 ]
Mhiri, T. [1 ]
机构：
[1] Fac Sci Sfax, LES, Sfax 3018, Tunisia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 416卷 / 1-2期
关键词：
DSC; selenate tellurate; DTA; structure conductivity; ferroelectricity;
D O I：
10.1016/j.jallcom.2005.08.040
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：
Crystal structure of (Na2SeO4Te)-Te-.(OH)6(.)H(2)O crystallizes in the monoclinic P2(1)/c space group. It was analyzed at room temperature using Xray diffractometer data. The unit cell parameters are a = 6.211(3) angstrom, b = 12.002(3) angstrom, c = 10.210(4) angstrom, beta = 104.99(2)degrees, Z= 4, V= 735.19(5) angstrom(3) and rho(cal) = 2.907 g cm(-3). The main feature of this atomic arrangements is the coexistence of two independent and different anions (TeO66- and SeO42- groups) in the unit cell, connected by hydrogen bonds which make the building of the crystal. The thermal analysis of the title compound show three distinct endothermal peaks at 390,420 and 430 K. The evolution of the dielectric constant as a function of frequency and temperature revealed one anomaly at about 420 K attributed to a ferro-paraelectric phase transition. However, the conductivity evolution versus temperature showed the presence of the ionic-protonic conduction phase transition at 430 K. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：228 / 235
页数：8
相关论文
共 50 条
  • [21] Crystal structure of Rb[UO2SeO4(OH)·H2O]
    Shishkina, O.V.
    Mikhajlov, Yu.N.
    Gorbunova, Yu.E.
    Serezhkina, L.B.
    Serezhkin, V.N.
    Doklady Akademii Nauk, 2001, 376 (03) : 356 - 361
  • [22] Crystal structure of Rb[UO2SeO4(OH) • H2O]
    Shishkina, OV
    Mikhailov, YN
    Gorbunova, YE
    Serezhkina, LB
    Serezhkin, VN
    DOKLADY CHEMISTRY, 2001, 376 (1-3) : 29 - 33
  • [23] Crystal Structure of Rb[UO2SeO4(OH) · H2O]
    O. V. Shishkina
    Yu. N. Mikhailov
    Yu. E. Gorbunova
    L. B. Serezhkina
    V. N. Serezhkin
    Doklady Chemistry, 2001, 376 : 29 - 33
  • [24] Hydrothermal Synthesis and Crystal Structures of Na2Be3(SeO3)4•H2O and Cs2[Mg(H2O)6]3(SeO3)4
    Shen, Chen
    Mei, Dajiang
    Sun, Chuanling
    Liu, Yunsheng
    Wu, Yuandong
    ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 2017, 643 (16): : 1082 - 1087
  • [25] Structural and vibrational study of K2SeO4 • Te(OH)6 material
    Dammak, M
    Khemakhem, H
    Mhiri, T
    Kolsi, AW
    Daoud, A
    JOURNAL OF SOLID STATE CHEMISTRY, 1999, 145 (02) : 612 - 618
  • [26] STRUCTURES OF 2 PHOSPHOTELLURATES - TE(OH)6.2(NH4)2HPO4 AND TE(OH)6.NA2HPO4.H2O
    DURIF, A
    AVERBUCHPOUCHOT, MT
    GUITEL, JC
    ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1979, 35 (JUN): : 1444 - 1447
  • [27] Structural diversity of sheets in rubidium uranyl oxoselenates:: Synthesis and crystal structures of Rb2[(UO2)(SeO4)2(H2O)](H2O), Rb2[(UO2)2(SeO4)3(H2O)2](H2O)4, and Rb4[(UO2)3(SeO4)5(H2O)]
    Krivovichev, SV
    Kahlenberg, V
    ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 2005, 631 (04): : 739 - 744
  • [28] GROWTH OF TE(OH)6NA2HPO4 . H2O SINGLE-CRYSTALS IN SILICA-GEL AND THEIR CHARACTERIZATION
    DEVANARAYANAN, S
    KALKURA, SN
    CRYSTAL RESEARCH AND TECHNOLOGY, 1988, 23 (06) : 811 - 814
  • [29] Refinement of crystal structure of Na2SeO4 at room temperature
    Fukami, T
    Chen, RH
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2003, 72 (12) : 3299 - 3300
  • [30] UBER DIE KRISTALLSTRUKTUR DES NATRIUMSELENATS, NA2SEO4
    NARAYSZABO, I
    ARGAY, G
    ACTA CHIMICA ACADEMIAE SCIENTARIUM HUNGARICAE, 1963, 39 (01): : 85 - &
12345