Structure and magnetism of novel mixed-anionic-group compounds M2(SeO3)(Te3O7) (M = Co2+, Ni2+)

被引：3
|
作者：
Zhang, Wanwan [1 ,2 ]
He, Zhangzhen [1 ]
Qiu, Chaoqun [1 ]
Cui, Meiyan [1 ]
Zhao, Zhiying [1 ]
Chen, Sihuai [1 ]
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 728卷
基金：
中国国家自然科学基金;
关键词：
Selenite-tellurites; Hydrothermal method; Crystal structure; Magnetic properties; TELLURITE-SULFATE COMPOUNDS; CRYSTAL-STRUCTURE; COPPER(II); SELENITES;
D O I：
10.1016/j.jallcom.2017.09.008
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Novel mixed-anionic-group compounds M-2(SeO3)(Te3O7) (M = Co2+, Ni2+) are successfully synthesized by a conventional hydrothermal method. Two compounds are isostructural which crystallize in the orthorhombic system of a space group Pnma. The framework shows a (MO6)(infinity) chain structure along the b-axis, while SeO3 groups are isolated and Te3O7 groups form the (Te3O7)(infinity) chains running along the aaxis. This is the first time to realize transition-metal compounds coexisting with Se4+ and Te4+ anionic groups. Magnetic measurements show that Co-2(SeO3)(Te3O7) possesses an antiferromagnetic ordering at similar to 11 K, while Ni-2(SeO3)(Te3O7) exhibits a similar antiferromagnetic ordering at similar to 31 K. Also, the fitting of magnetic susceptibility using a spin-chain model gives the exchange coupling J/kB = -1.515 K for Co-2(SeO3)(Te3O7) and J/kB = -8.963 K for Ni-2(SeO3)(Te3O7), respectively. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：253 / 258
页数：6
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