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 Which of the following statements is true for interstitial voids?

Option: 1

They occur when the lattice points of a crystal are not completely occupied by atoms.


Option: 2

A crystal lattice always contains them.


Option: 3

They can be occupied by larger atoms than those that form the crystal lattice.


Option: 4

They cannot be occupied by any atoms.


Answers (1)

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 An interstitial void is a small empty space in a crystal lattice that is surrounded by atoms. These voids occur due to the packing arrangement of atoms in a crystal lattice, and they are always present in a crystal lattice.

Interstitial voids can be occupied by atoms or molecules that are smaller in size than the void, known as interstitial atoms, or they can be occupied by larger atoms or molecules than the void, known as interstitial defects.

When interstitial atoms occupy the void, they can cause changes in the physical and chemical properties of the crystal. For example, interstitial atoms can increase the hardness, strength, and ductility of the crystal lattice.

When larger atoms occupy the interstitial voids, they create interstitial defects, which can cause distortion of the crystal lattice. These defects can result in changes in the electrical, magnetic, and thermal properties of the crystal.

In summary, interstitial voids are always present in a crystal lattice and can be occupied by smaller or larger atoms or molecules, depending on the size of the void. The occupation of interstitial voids can cause changes in the physical and chemical properties of the crystal.

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