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Diamond is a network covalent solid with no molecular boundaries

Chemistry

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Diamond is a network covalent solid with no molecular boundaries.

Each carbon atom in diamond is covalently bound to 4 other carbon atoms in a tetrahedral array. Because there are NO molecular boundaries, the physical properties of diamond, melting point/boiling point, are so high as to be almost unmeasurable. To break up the solid structure, enough energy has to be pumped in to break STRONG ##C-C## bonds that are covalently bound in an infinite array.