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Issue 24, 2013
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Crystal structure and magnetic properties of Cr3Te5O13Cl3

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Abstract

A new chromium tellurite oxochloride, Cr3Te5O13Cl3, has been prepared by solid-state reaction and the crystal structure was determined by single crystal X-ray diffraction. The compound crystallizes in the non-centrosymmetric space group P212121 with the unit cell a = 4.90180(10) Å, b = 17.3394(2) Å, c = 17.5405(2) Å, Z = 4, R1 = 0.0282. The Cr3+ ions have octahedral [CrO6] oxygen coordination, the Te4+ ions have one sided [TeO3] and [TeO3Cl] coordinations. The [CrO6] octahedra are edge sharing and form chains extending along [100]. These are connected by corner sharing [TeO3] and [TeO3Cl] groups to form layers parallel to (110). The layers are connected by weak interactions in between Te4+ in the layers and Cl ions located in between. The compound undergoes antiferromagnetic ordering at ∼34 K with a Weiss constant of −230 K. Isothermal magnetization measurements reveal a critical field of about 0.25 T above which the magnetization versus field changes from linear to a Brillouin-like saturation behaviour. The frustration ratio amounts to ∼6.8 indicative of sizable competing antiferromagnetic spin-exchange interaction. The dielectric constant ε (6 kHz) amounts to ∼7.9 and decreases by about 1% on cooling from 50 K to liquid helium temperatures.

Graphical abstract: Crystal structure and magnetic properties of Cr3Te5O13Cl3

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Supplementary files

Article information


Submitted
14 Mar 2013
Accepted
09 Apr 2013
First published
10 Apr 2013

This article is Open Access

Dalton Trans., 2013,42, 8815-8819
Article type
Paper

Crystal structure and magnetic properties of Cr3Te5O13Cl3

I. Zimmermann, R. K. Kremer, P. Reuvekamp and M. Johnsson, Dalton Trans., 2013, 42, 8815
DOI: 10.1039/C3DT50706H

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