Other contributors have said "All about crystal and crystal lattices?" is the same question as "What is a crystal lattice?" If you believe that these are not asking the same thing and should be answered differently, click here
crystal lattice means atoms of the lattice are arranged in a regular manner and every atom or ion in the structure have same property with the remaining atoms or ions in the structure
In mineralology it refers to the cros-grain crystalline pattern in crystals, such as quartz. It resembles lattice. It is not used in conversation very often.
The properties of crystal lattice are that they are brittle, have low melting points, dissolve in water, and conduct electric currents in a solution. Hope this helps!