2.) Given this information, answer the following questions for crystalline CsBr. ionic radius of Cs: 0.167 nm ionic radius of Br: 0.196 nm atomic mass of Cs: 132.9 g/mole atomic mass of Br: 79.9 g/mole a. What is its expected crystal structure? Justify your answer. b. What is its theoretical lattice parameter? c. What is its theoretical density (in g/cm3)?

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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.