![]() It is often observed in the nature that one element/ molecule can exist in different crystal structure based on the differences in the periodic arrangement of atoms with respect to each-other. The lengths of the edges of a unit cell and the angles between them are called the lattice parameters. The points can be thought of as forming identical tiny boxes, called unit cells, that fill the space of lattice. Motifs are located upon the points of lattice, which is an array of points repeating periodically in three dimensions. It is composed of a motif, which is a set of atoms arranged in a particular way, and a lattice. 2D Ordered Arrangement of BricksĪ2. A crystal structure is a unique arrangement of atoms, molecules or ions in a crystal. This can be imagined as the stacking of bricks in a wall (resembling to a two dimensional ordered arrangement of bricks!). How does the arrangement of atoms help determine the crystal structure?Ī1. A crystal consists of matter that is formed of an ordered three dimensional arrangement of atoms, molecules or ions. ![]()
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