Shown below is one face of a hypothetical face-centered cubic unit cell. The cell length (short side of the right triangle) is 6.67 Å. What is the length of the long side in Å? ( 1 Angstrom = 0.1 nm) (A) 9.43 B) 3.65 13.56 D) 11.34

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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.