Title :

Lone-pair self-containment in pyritohedron-shaped closed cavities: optimized hydrothermal synthesis, structure, magnetism and lattice thermal conductivity of Co15F2(TeO3)14

Author(s) :

Lu, Minfeng [Auteur]
Jiang, Jianhua [Auteur]
Zhu, Bei [Auteur]
Zhao, Yuwei [Auteur]
Zhu, Tianyu [Auteur]
Yang, Haoming [Auteur]
Jin, Yong [Auteur]
Kabbour, Houria [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Choi, Kwang-Yong [Auteur]
Harrison, William T. A. [Auteur]

Journal title :

Dalton Transactions

Abbreviated title :

Dalton Trans

Volume number :

49

Pages :

2234-2243

Publisher :

Royal Society of Chemistry (RSC)

Publication date :

2020-01-31

ISSN :

1477-9226

HAL domain(s) :

Chimie/Chimie inorganique
Chimie

English abstract : [en]

A new oxofluoride Co15F2(TeO3)14 has been prepared by optimized hydrothermal synthesis involving a complex mineralization process. The crystal structure consists of a three-dimensional network of CoO5(O,F) octahedra, ...
Show more >A new oxofluoride Co15F2(TeO3)14 has been prepared by optimized hydrothermal synthesis involving a complex mineralization process. The crystal structure consists of a three-dimensional network of CoO5(O,F) octahedra, distorted CoO5 square pyramids, TeO3 trigonal pyramids and grossly distorted TeO3+3 octahedra, which are linked by sharing corners and edges. The Te(iv) lone pairs are accommodated within novel pyritohedron-shaped [(TeO3)14]28- units. This special framework provides a much larger free space that allows Te atoms to vibrate with a large amplitude, which leads to extremely low lattice thermal conductivity. Magnetic susceptibility data for Co15F2(TeO3)14 show antiferromagnetic ordering below 9.6 K with a substantial orbital component to the effective magnetic moment. An S = 3/2 honeycomb-like spin network was carefully analyzed by experimental techniques and first principles calculations.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Matériaux inorganiques, structures, systèmes et propriétés (MISSP)

Submission date :

2022-03-02T07:13:11Z
2023-03-17T12:55:27Z