The melting point of mercury at 1 bar is −38.87°C. The density of liquid mercury at these conditions is 13.69?/??3 and the density of the solid phase is 14.193?/??3. The associated heat of fusion is 9.75?/?. Estimate the melting point of mercury under the pressure of 3540???.

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.