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| | | #REDIRECT: [[Hexagonal column]] |
| #REDIRECT [[hexagonal column]] | |
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| == hexagonal column ==
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| <div class="definition"><div class="short_definition">One of the many forms in which [[ice crystals]] are found in the [[atmosphere]].</div><br/> <div class="paragraph">This particular [[crystal habit]] of [[ice]] is characterized by hexagonal cross section in a plane perpendicular to the long direction (principal axis, optic axis, or c axis) of the columns. It differs from that found in hexagonal platelets only in that environmental conditions have favored growth along the principal axis rather than perpendicular to that axis. Growth by [[vapor]] deposition at temperatures of from -3° to about -8°C and also at lower [[temperature]] below -25°C leads to growth of columnar crystals, though other [[crystal]] features (needles, scrolls) also appear in this temperature interval, depending on the degree of [[water vapor]] supersaturation and the crystal [[fall velocity]]. <br/>''See'' [[column]].</div><br/> </div>
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