Primarily, this is because the periodicity of atoms in a crystal--its defining characteristic--facilitates mathematical modeling, and also because crystalline materials often have electrical, magnetic, optical, or mechanical properties that can be exploited for engineering purposes.
Primarily, this is because the periodicity of atoms in a crystal--its defining characteristic--facilitates mathematical modeling. Likewise, crystalline materials often have electrical, magnetic, optical, or mechanical properties that can be exploited for engineering purposes.