A novel phosphate with CoII square planar coordination, BaCo0.5Fe(PO4)2: structural and magnetic features

被引：3

作者：

Alloun, Fouad ^{[1
]}

Hadouchi, Mohammed ^{[1
]}

El Arni, Sirine ^{[1
]}

Assani, Abderrazzak ^{[1
]}

Saadi, Mohamed ^{[1
]}

El Marssi, Mimoun ^{[2
]}

Lahmar, Abdelilah ^{[2
]}

El Ammari, Lahcen ^{[1
]}

机构：

[1] Mohammed V Univ Rabat, Fac Sci, Ctr Sci Mat, Lab Chim Appl Mat, Ave Ibn Battouta,BP 1014, Rabat, Morocco

[2] Lab Phys Matiere Condensee, 33 Rue St-Leu, F-80033 Amiens, France

来源：

DALTON TRANSACTIONS | 2024年 / 53卷 / 04期

关键词：

CRYSTAL-STRUCTURE; ELECTRONIC-PROPERTIES; TRANSFORMATION; IRON(II);

D O I：

10.1039/d3dt03539e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A novel phosphate containing barium, cobalt, and iron was synthesized in single-crystal and polycrystalline forms. Single crystal-based X-ray measurements revealed that it crystallizes in the monoclinic system with the P2(1)/c space group. The structure is made up of linkages between FeO6 octahedra, CoO4 square planar units, CoO5 square pyramidal units, and PO4 tetrahedra through edges and/or vertices. The interconnection of these polyhedra leads to a three-dimensional framework with tunnels along the a-axis where the Ba2+ cations are located. The polycrystalline form was prepared via the sol-gel method and its XRD pattern was refined by the Le Bail method. Morphological and elemental mapping analyses of this phosphate were performed by scanning electron microscopy. In addition, infrared and Raman spectroscopy provided more insights into chemical bonding. The magnetic behavior was antiferromagnetic below T-N similar to 20 K. Optical measurements revealed a direct bandgap with an energy E-g of 2.83 eV.

引用

页码：1630 / 1639

页数：10

共 50 条

[1]

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[2] Synthesis, structural characterization and magnetic behavior of a novel phosphate: K4(Co0.25Fe0.75)4(PO4)5 [J].