3. Within a cubic unit cell, sketch the following directions: (a) [110] (c) [012] (e) [111] (g) [123] [121] (d) [133] (f) [122] (h) [103] (b)

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A:

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A: The solution is given below -

Q: What are the number of cations and anions in each of the unit cells shown below

A:

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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.