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
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
收藏
页码:1737 / 1742
页数:6
相关论文
共 30 条
[1]   Solid-state chemistry of early transition-metal oxides containing d(0) and d(1) cations [J].
Bhuvanesh, NSP ;
Gopalakrishnan, J .
JOURNAL OF MATERIALS CHEMISTRY, 1997, 7 (12) :2297-2306
[2]   CRYSTALLOGRAPHIC DATA OF SODIUM LANTHANIDE TITANATES (NALNTIO4) [J].
BLASSE, G .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1968, 30 (02) :656-&
[3]  
Bruce PG, 1997, CHEM COMMUN, P1817
[4]   Structure and Raman spectra of layered titanium oxides [J].
Byeon, SH ;
Lee, SO ;
Kim, H .
JOURNAL OF SOLID STATE CHEMISTRY, 1997, 130 (01) :110-116
[5]   NEW SUPERCONDUCTING INTERCALATION COMPOUNDS - (HGX(2))(0.5)BI2SR2CACU2OY (X=BR AND I) [J].
CHOY, JH ;
PARK, NG ;
HWANG, SJ ;
KIM, DH ;
HUR, NH .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1994, 116 (25) :11564-11565
[6]  
DION M, 1984, REV CHIM MINER, V21, P92
[7]   THE NEW PHASE FAMILIES MIM2(II)NB3010 WITH PEROVSKITE SHEETS [J].
DION, M ;
GANNE, M ;
TOURNOUX, M .
MATERIALS RESEARCH BULLETIN, 1981, 16 (11) :1429-1435
[8]  
DION M, 1986, REV CHIM MINER, V23, P61
[9]  
GONDRAND M, 1987, REV CHIM MINER, V24, P33
[10]   CHIMIE DOUCE APPROACHES TO THE SYNTHESIS OF METASTABLE OXIDE MATERIALS [J].
GOPALAKRISHNAN, J .
CHEMISTRY OF MATERIALS, 1995, 7 (07) :1265-1275