he crystalline density of polypropylene is 1.121 g/cm³, and its amorphous density is 0.906 g/cm³. What is the weight percent of the structure that is crystalline in a olypropylene that has a density of 1.054 g/cm³? elect one: a. 65 % b. 73 % c. 1.36 % d. 13.6 %

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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.