Ice Crystal 1
Ice Crystal 1 : Also: Snow Crystal. Any segment of ice in which the molecules are arranged in the same orderly array. Snow particle growth in the atmosphere begins in the form of small ice crystals. If the ice crystal continues to grow by sublimation a snow crystal is formed. This is a larger particle, often with an intricate shape, which is visible to the naked eye. Ice crystals have three symmetric axes in the basal plane (the a-axes) and one axis perpendicular to that basal plane (the c-axes). The three a-axes are separated by 120 degrees which leads to hexagonal symmetry in this plane
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