In RbF(s), the Rb* ions occupy octahedral sites in a face-centred cubic lattice of Fions. Use the data below to estimate the size of lattice parameter of the unit cell, the mass of the unit cell, the volume of the unit cell, and the density of the solid. lon Rb F Mass 85.47 g mol-¹ 19.00 g mol-1 Radius 149 pm 133 pm Enter your answers to the following questions in the specified units and with the specified number of digits. Do not include units as part of your answer. (a) What is the lattice parameter of the unit cell, in picometres (pm) ? Number rounded to the nearest picometre.) pm (Enter your answer

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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.