Neutron and X-ray diffraction study of the crystal structure of CsTiSi2O6.5

被引：22

作者：

Balmer, ML

Huang, Q

WongNg, W

Roth, RS

Santoro, A

机构：

[1] UNIV MARYLAND, COLLEGE PK, MD 20742 USA

[2] PACIFIC NW LAB, RICHLAND, WA 99352 USA

[3] NATL INST STAND & TECHNOL, GAITHERSBURG, MD 20899 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1997年 / 130卷 / 01期

关键词：

D O I：

10.1006/jssc.1997.7284

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The structure of the silicotitanate CsTiSi2O6.5 has been analyzed with neutron powder and X-ray single crystal diffraction techniques. The compound crystallizes with the symmetry of space group Ia (3) over bar d and lattice parameter a = 13.8417(7) Angstrom. There are 16 formula units in the unit cell, The basic structure of the silicotitanate is similar to that of pollucite and consists of a framework of corner-sharing TO4 tetrahedra (T = 1/3 Ti+ 2/3 Si) forming large voids in which the Cs+ cations are located. Titanium and silicon are disordered over the 48g sites of the cubic space group. Compared to pollucite, there are eight extra oxygen atoms in the unit cell. These atoms partially occupy two sets of general sites and are bonded to both the cesium and the T cations of neighboring tetrahedra. (C) 1997 Academic Press.

引用

页码：97 / 102

页数：6

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