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Allotropy or allotropism is the property of some chemical elements to exist in two or more different forms, known as allotropes of these elements. Allotropes are different structural modifications of an element; the atoms of the element are bonded together in a different manner. Carbon is an element capable of forming many allotropes due to its valency. Well known allotropic forms of carbon include diamond and graphite. In Diamond the carbon atoms are bonded together in a tetrahedral lattice arrangement.