Synthesis and structural study of the new perovskite series CaLn2ZnTi2O9 (=(Ca1/3Ln2/3)A(Zn1/3Ti2/3)BO3) (Ln=La, Pr, Nd, Eu)

被引：4

作者：

Aatiq, A

Boukhari, A

机构：

[1] Fac Sci Ben MSik, Dept Chim, Lab Chim Mat Solides, Casablanca, Morocco

[2] Fac Sci Rabat, Lab Chim Solide Appliquee, Rabat, Morocco

来源：

MATERIALS LETTERS | 2004年 / 58卷 / 19期

关键词：

perovskites; crystal structure; rietveld analysis; X-ray techniques;

D O I：

10.1016/j.matlet.2004.02.023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The new perovskites CaLn(2)ZnTi(2)O(9) (Ln = La, Pr, Nd, Eu) have been synthesized in polycrystalline form by a conventional solid-state reactions process at 1300 degreesC in air atmosphere. The structure refinement of the four samples, by Rietveld analysis using X-ray powder diffraction (XRD), shows that the cationic distribution over the A- and B-sites of the perovskite structure can be illustrated by the crystallographic formula (Ca(1/3)Ln(2/3))A(Zn1/3Ti2/3)(B)O-3. All phases were described as orthorhombic perovskites with a GdFeO3-type structure, Pbnm space group, in which A (Ca(Ln)) and B (Zn(Ti)) cations are disordered at random. Magnetic susceptibility measurements of the selected (Ca1/3Pr2/3)(A)(Zn1/3Ti2/3)(B)O-3 phase are consistent with the presence of Pr3+ ions in this compound. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：2406 / 2411

页数：6

共 35 条

[1] Synthesis and crystal structure of the new perovskite CaLa2CaTi2O9 (=(Ca1/3La2/3)A(Ca1/3Ti2/3)BO3) [J].