**5. The nanovoid and predissociation of an ideal crystal cell**

The sublimation, dissociation, or destruction of a crystal is the process of destroying those chemical bonds that place atomic particles in the space periodically. This section examines the crystal predissociation as a state of its particles that follows after the breaking of the chemical bonds of the crystal cell and directly precedes their scattering. A description of the crystal predissociation is missing in the literature, but it is similar to the predissociation of molecules in gas, which has been studied well enough. In this section, we consider the fragments of an ideal crystal. These fragments are restricted based on the number of atomic particles. The elemental cell of the crystal serves as an example of such a fragment.
