Crystal structure and magnetic properties of Co{sub 2}TeO{sub 3}Cl{sub 2} and Co{sub 2}TeO{sub 3}Br{sub 2}
- Department of Inorganic Chemistry, Stockholm University, S-106 91 Stockholm (Sweden)
- Institut de Physique de la Matiere Complexe, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne (Switzerland)
- Institute of Physics, POB 304, HR-10000 Zagreb (Croatia)
The crystal structures of the two new synthetic compounds Co{sub 2}TeO{sub 3}Cl{sub 2} and Co{sub 2}TeO{sub 3}Br{sub 2} are described together with their magnetic properties. Co{sub 2}TeO{sub 3}Cl{sub 2} crystallize in the monoclinic space group P2{sub 1}/m with unit cell parameters a=5.0472(6) A, b=6.6325(9) A, c=8.3452(10) A, {beta}=105.43(1){sup o}, Z=2. Co{sub 2}TeO{sub 3}Br{sub 2} crystallize in the orthorhombic space group Pccn with unit cell parameters a=10.5180(7) A, b=15.8629(9) A, c=7.7732(5) A, Z=8. The crystal structures were solved from single crystal data, R=0.0328 and 0.0412, respectively. Both compounds are layered with only weak interactions in between the layers. The compound Co{sub 2}TeO{sub 3}Cl{sub 2} has [CoO{sub 4}Cl{sub 2}] and [CoO{sub 3}Cl{sub 3}] octahedra while Co{sub 2}TeO{sub 3}Br{sub 2} has [CoO{sub 2}Br{sub 2}] tetrahedra and [CoO{sub 4}Br{sub 2}] octahedra. The Te(IV) atoms are tetrahedrally [TeO{sub 3}E] coordinated in both compounds taking the 5s {sup 2} lone electron pair E into account. The magnetic properties of the compounds are characterized predominantly by long-range antiferromagnetic ordering below 30 K.
- OSTI ID:
- 20784927
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 3; Other Information: DOI: 10.1016/j.jssc.2005.12.007; PII: S0022-4596(05)00586-4; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
Similar Records
Crystal structure and magnetic properties of the coupled spin dimer compound SrCu{sub 2}(TeO{sub 3}){sub 2}Cl{sub 2}
A rare multi-coordinate tellurite, NH{sub 4}ATe{sub 4}O{sub 9}.2H{sub 2}O (A=Rb or Cs): The occurrence of TeO{sub 3}, TeO{sub 4}, and TeO{sub 5} Polyhedra in the same material