In the case of sodium chloride, the unit cell is face-centered cubic, which means it has atoms at each corner and at the center of each face of the cube. The unit cell can be primitive, where atoms are only located at each corner of the unit cell, or it can be non-primitive, where atoms are also located at other points within the unit cell. Together, these axes and parameters can describe the three-dimensional arrangement of atoms, ions, or molecules in a crystal lattice.Ī crystal lattice can have different types of unit cells, depending on the arrangement of atoms, ions, or molecules. The crystallographic axes are imaginary lines that define the boundaries of the unit cell, and the parameters are the measurements that describe the lengths of these axes and the angles between them. The unit cell can be defined by its crystallographic axes and parameters, which describe its dimensions and shape. The unit cell is the building block of this structure, and when repeated in a specific pattern, it creates the entire crystal lattice. Crystalline solids have a three-dimensional arrangement of atoms, ions, or molecules that repeat themselves periodically, forming a crystal lattice structure. A unit cell is the smallest repeating unit of a crystal lattice.
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