Space lattices and
crystals

A perfect crystal is considered to be constructed
by a space lattice, i.e. by infinite regular
repetition in space of identical structure units.
Thus, the ideal crystal is invariant under translation
in steps of lattice constants and related distances. It
is also invariant under rotation in steps of well defined angles.
There are 230 basic different repetitive patterns.
Here we present some of the most important crystal structures.
By mouse clicking, you can investigate their symmetry
properties (e.g. 3fold rotation axis,
4fold rotation axis, mirror planes, etc.).
