Abstract
The new nickel selenite chloride, Ni 5(SeO 3) 4Cl 2, was obtained by high-temperature solid state reaction of NiCl 2, Ni 2O 3 and SeO 2 in a 1:2:4 molar ratio at 700 °C in an evacuated quartz tube. Its structure was established by single-crystal X-ray diffraction. Ni 5(SeO 3) 4Cl 2 crystallizes in the triclinic system, space group P-1 (No. 2) with cell parameters of a=8.076(2), b=9.288(2), c=9.376(2) Å, α=101.97(3), β = 105.60 ( 3 ) , γ = 91.83 ( 3 ) ° and Z = 2 . All nickel(II) ions in Ni 5(SeO 3) 4Cl 2 are octahedrally coordinated by selenite oxygens or/and chloride anions (([Ni(1)O 5Cl], [Ni(2)O 4Cl 2], [Ni(3)O 5Cl], [Ni(4)O 6] and [Ni(5)O 4Cl]). The structure of the title compound features a condensed three-dimensional (3D) network built by Ni(II) ions interconnected by SeO 3 2− anions as well as Cl − anions. Magnetic property measurements show strong antiferromagnetic interaction between nickel(II) ions.
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