6. Polonium is the only metal that form a simple cubic crystal. Using PPO = 9.32 g/cm³, calculate its atomic radius, 7. Manganese has BCC unit cell and has a pMn = 4.68 g/cm³. From this information, calculate the length of the edge of the cube cell.

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.