Zinc Iodide
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High Quality Content by WIKIPEDIA articles! Zinc iodide is a chemical compound of zinc and iodine, ZnI2. The anhydrous form is white and readily absorbs water from the atmosphere. It can be prepared by the direct reaction of zinc and iodine in refluxing ether. The structure of crystalline ZnI2 is unusual, and whilst zinc atoms are tetrahedrally coordinated, as in ZnCl2, groups of four of these tetrahedra share three vertices to form super-tetrahedra of composition {Zn4I10}, which are linked by their vertices to form a three dimensional structure. These "super-tetrahedra" are similar to the…mehr

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High Quality Content by WIKIPEDIA articles! Zinc iodide is a chemical compound of zinc and iodine, ZnI2. The anhydrous form is white and readily absorbs water from the atmosphere. It can be prepared by the direct reaction of zinc and iodine in refluxing ether. The structure of crystalline ZnI2 is unusual, and whilst zinc atoms are tetrahedrally coordinated, as in ZnCl2, groups of four of these tetrahedra share three vertices to form super-tetrahedra of composition {Zn4I10}, which are linked by their vertices to form a three dimensional structure. These "super-tetrahedra" are similar to the P4O10 structure. Molecular ZnI2 is linear as predicted by VSEPR theory with a Zn-I bond length of 238 pm.