SYNTHESIS AND STRUCTURE REFINEMENT OF Ca0.5Sr0.5FeO2 SOLID SOLUTION

被引：0
|
作者：
Zeroual, Soria [1 ]
Mahboub, Mohammed Sadok [1 ]
Boudjada, Ali [2 ]
机构：
[1] Univ El Oued, LEVRES Lab, Dept Phys, Fac Exact Sci, El Oued, Algeria
[2] Univ Constantine 1, Fac Sci Exactes, Lab Cristallog, Unite Rech Phys, Constantine, Algeria
来源：
UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE | 2016年 / 78卷 / 03期
关键词：
Calcium strontium oxoferrate; Crystal structure; Infinite layer; X-ray Powder diffraction; Rietveld refinement;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Ca0.5Sr0.5FeO2 solid solution has been prepared by the reacting of Ca0.5Sr0.5FeO2.5 brownmillerite with CaH2 at 553 K. The crystal structure of Ca0.5Sr0.5FeO2 phase has been refined by the Rietveld method from X-ray powder diffraction data. In the present study, we have successfully synthesized a stable Oxoferrate Ca0.5Sr0.5FeO2 phase, where no phase separation was observed. The structure is tetragonal, space group P4/mmm, a=3.95718 (9) angstrom and c=3.39839 (13) angstrom. The Final structure refinement values of the Rietveld parameters are: R-p=1.15%, R-wp=1.75% and chi(2)=2.72. The structure of Ca0.5Sr0.5FeO2 consists of a stacking sequence of infinite FeO2 layers with square-planar coordinated iron (II) lattices separated by alternating Ca/Sr atoms in the c direction. This structure might be promising candidates for applications as membrane in solid oxide fuel cells (SOFC).
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页码：137 / 144
页数：8
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