The crystal structure of magnesium oxide, CaS, is similar to rock salt (NaCl). a) What are the coordination numbers of Ca2+ and S2-. b) What is the type of unit cell that you would expect CaS to have? c) Given that the ionic radii is (Ca2+ = 100 pm and S2- = 184 pm) what is the length and volume of the unit cell.

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A: In solid state chemistry, We study about the structure, properties ,and many more information.

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A: Atomic packing factor= volume of atoms in unit cell/volume of unit cell

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A: Silver ion = darker spheres Chloride ion = not darker spheres

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.