Synthesis and characterization of layered titanium oxides NaRTiO4 (R=La, Nd and Gd)

被引：18

作者：

Zhu, WJ ^{[1
]}

Feng, HH ^{[1
]}

Hor, PH ^{[1
]}

机构：

[1] UNIV HOUSTON,TEXAS CTR SUPERCONDUCT,HOUSTON,TX 77204

来源：

MATERIALS RESEARCH BULLETIN | 1996年 / 31卷 / 01期

基金：

美国国家科学基金会;

关键词：

Layered titanates; Magnetic susceptibility; Rare-earth; Sodium;

D O I：

10.1016/0025-5408(95)00167-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The layered titanium oxides NaRTiO(4) (R = La, Nd and Gd) have been synthesized at 850 degrees C. The lattice parameter a decreases with decreasing of the ionic size of R, in contrast to the results previously reported for samples synthesized at higher temperature, 1050 degrees C. X-ray Rietveld refinement of NaNdTiO4 confirmed the ordering of Na and R and the large displacement of Ti from the center of the oxygen coordination octahedra, resulting in one strong and one weak Ti-O bonds along c-axis. Magnetic susceptibility of the rocksalt-type (NdO)(2) layer in NaNdTiO4 resembles that of the fluorite-type Nd2O2 layer in Nd2CuO4.

引用

页码：107 / 111

页数：5

共 13 条

[1] CRYSTALLOGRAPHIC DATA OF SODIUM LANTHANIDE TITANATES (NALNTIO4) [J].