Citations:crystal


 * The consummate symmetry of the commonest crystals - with their plane facets and well-defined angles of intersection - leads very naturally to the supposition that their constituents, be they molecules, atoms or ions, are regularly arranged in a repetitive pattern.
 * The consummate symmetry of the commonest crystals - with their plane facets and well-defined angles of intersection - leads very naturally to the supposition that their constituents, be they molecules, atoms or ions, are regularly arranged in a repetitive pattern.