Structure of Ba2In2-zVzO5+z phases: Complementarity of diffraction, Raman and absorption techniques

摘要：

By combining X-ray and neutron diffraction with Raman and X-ray absorption spectroscopies, the location of vanadium in the structure of the Ba2In2-xVxO5+x solid solution and its local environment was evidenced. Vanadium is spread over the two indium sites of the Brownmillerite structure but its surrounding is tetrahedral. This involves the introduction of oxygen vacancies in the octahedral layers of Ba2In2O5 and the presence of indium with a six-fold coordination in the tetrahedral layers. The number of InO octahedra increases with the substitution rate which explains the stabilisation of cubic forms for substitution rate higher than 0.3.

关键词： Brownmillerite Barium ozide Indium ozide Ba2In2O5 X-ray absorption spectroscopy Raman scattering

作者: A.Rolle S.Daviero-Minaud P.Roussel A.Rubbens R.N.Vannier

作者单位: Equipe de Chimie du Solide, UCCS, Unite de Catalyse et Chimie du Solide, CNRS UMR 8181, USTL-ENSCL, BP 90 108, 59652 Villeneuve dAscq Cedex, France

会议类型: 国际会议

会议名称: The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)

会议地点: 上海

会议语种:英文

页码: 771-775

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）