Synthesis and structure of a double-layered perovskite and its hydrate, K2SrTa2O7•mH2O (m=0, 2)

被引：25

作者：

Kodenkandath, TA

Wiley, JB ^{[1
]}

机构：

[1] Univ New Orleans, Dept Chem, New Orleans, LA 70148 USA

[2] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

来源：

MATERIALS RESEARCH BULLETIN | 2000年 / 35卷 / 10期

关键词：

layered compounds; oxides; chemical synthesis; X-ray diffraction;

D O I：

10.1016/S0025-5408(00)00375-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Studies on the known compound, K2SrTa2O7, and its hydrate are reported. A method for preparing single-phase samples is presented. Rietveld structural refinement of X-ray powder diffraction data verify that K2SrTa2O7 is an n = 2 member of the Ruddlesden-Popper series; K2SrTa2O7 was refined on the body-centered tetragonal space group I4/mmm with a = 3.9768(1) Angstrom and c = 21.7062(6) Angstrom. This compound readily hydrates in air to form K2SrTa2O7. 2H(2)O. Structural analysis on a primitive tetragonal cell (P4/mmm), where a = 3.9599(1) Angstrom and c = 12.7568(3) Angstrom, shows that on intercalation of water the staggered perovskite layers of K2SrTa2O7 shift to an eclipsed configuration. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1737 / 1742

页数：6

共 30 条

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