Why is a crystal incompressible?

A crystal is considered incompressible primarily due to its tightly packed atomic structure, where atoms are arranged in a fixed, orderly lattice. The strong intermolecular forces within the crystal lattice resist changes in volume when pressure is applied. Additionally, the rigidity of the bonds between atoms limits their ability to move closer together, making it difficult to compress the crystal further. As a result, crystals typically exhibit low compressibility compared to other materials.