CRYSTAL-STRUCTURE AND THERMAL-BEHAVIOR OF H2TI3O7 - A NEW DEFECTIVE RAMSDELLITE FORM FROM LI+/H+ EXCHANGE ON LI2TI3O7

被引：28

作者：

LEBAIL, A

FOURQUET, JL

机构：

[1] Laboratoire des Fluorures, URA CNRS 449, Faculté des Sciences du Mans, 72017 Le Mans Cedex, Route de Laval

来源：

MATERIALS RESEARCH BULLETIN | 1992年 / 27卷 / 01期

关键词：

TITANIUM OXYHYDROXIDE;

D O I：

10.1016/0025-5408(92)90045-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new form of H2Ti3O7, belonging to the ramsdellite structural type, is obtained by a simple Li+/H+ exchange on Li2Ti3O7. The symmetry is preserved during the exchange reaction (Pnma, a = 9.7689(6), b = 2.9212(2) and c = 4.6745(4) angstrom). The crystal structure is solved from both X-Ray and neutron powder diffraction data. The final model is compared to the structures of alpha-MOOH phases as groutite and diaspore. Its thermal behaviour is studied by DSC, TGA and neutron thermodiffractometry. Between 373 and 675 K, three phases are evidenced before the final transformation into TiO2 rutile.

引用

页码：75 / 85

页数：11

共 18 条

[1] REFINEMENT OF THE LITHIUM DISTRIBUTION IN LI2TI3O7 USING HIGH-RESOLUTION POWDER NEUTRON-DIFFRACTION [J].