A periodic nanostructure that exhibit periodicity in its structure that results in bandgaps where energy cannot propagate, as well as negative refraction that can be exploited for wave focusing.

plural of ferroelectric crystal

a crystal which exhibits a spontaneous electric dipole moment

plural of seed crystal

plural of crystal habit

(crystallography) Any of 32 possible classes of crystals, arising from the 32 possible combinations of symmetry operations.

plural of crystal class

(crystallography) The characteristic external shape of an individual crystal or crystal group.

plural of twin crystal

plural of fractional crystallization