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<p><b>Aperiodic crystals</b> are crystals that lack <a href="page.php?w=translational_symmetry">translational symmetry</a> in at least one dimension, but still exhibit long-range order in 3 dimensions. Where as <a href="page.php?w=Crystal_structure">traditional crystals</a> can be viewed by a <a href="page.php?w=unit_cell">unit cell</a> containing some set of matter (atoms, molecules, ions, etc) repeated in 3 dimension, an aperiodic crystal has at least some feature which cannot be described in this manner, but does have some defined rule by which</p><p>
<a accesskey="3" href="page.php?w=Aperiodic_crystal&amp;p=2">3.Next</a>
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