- Ice crystals
Ice crystals - small crystalline form of
iceincluding hexagonal columns, hexagonal plates, dendritic crystals, and diamond dust.
Temperature and water vapor humidity determine crystalline forms. Ice crystals are responsible for various atmospheric optics displays in the atmosphere. The principal axis (c axis) of a single crystal of ice is perpendicular to the axis of hexagonal symmetry. Planes perpendicular to this axis are called basal planes.Ice clouds are composed of ice crystals. The most notable one is
cirrusand ice fog.
* [http://www.its.caltech.edu/~atomic/snowcrystals/ Caltech homepage]
* [http://amsglossary.allenpress.com/glossary/search?id=ice-crystal1 American Meteorological Society Glossary]
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