Surf these sites: Crystal Lattice Structures -- A site which lists the possible crystal lattice structures and coordinates of atoms in such crystals. Nice graphics too. Crystal Lattice Structures -- A list of the possible crystal structures with a diagram of each type. Introduction to Cubic Crystal Lattices -- A site introducing the properties of crystals with a cubic unit cell. Snow Crystals -- Information about the physics of snow crystals and snowflakes as well as the history of early scientific observations and photographs, how to take photos, preserving snow crystals, and unusual snowflakes.
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