By Team Aakash Byju's
In solid-state, voids are the vacant space between the constituent particles in a closely packed structure.
This can be done in three ways: - 1D close packing – 2D close packing and – 3D close packing
In 2D packing, the atoms are arranged either in square close packing or in hexagonal close packing.
In the case of hexagonal packing, the voids are in a triangular shape and hence are known as triangular voids.
In 3D structure, we notice two types of voids: – Tetrahedral voids and – Octahedral voids
The voids are present among four spheres that have a tetrahedral arrangement. Each sphere adjoins the first layer's three spheres.
The triangular voids of the first layer coincide with the triangular voids of the layer above or below it to form a void enclosing six spheres.
The voids thus created are octahedrons.