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hexagonal platelet

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hexagonal platelet [hek′sag·ə·nəl ′plāt·lət]
(meteorology)
A small ice crystal of the hexagonal tabular form; the distance across the crystal from one side of the hexagon to the opposite side may be as large as about 1 millimeter, and the thickness perpendicular to this dimension is of the order of one-tenth as great; this crystal form is usually formed at temperatures of -10 to -20°C by sublimation; at higher temperatures the apices of the hexagon grow out and develop dendritic forms.


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The chemical make-up of this composite is hexagonal platelets of aragonite.
Instead of having varying shapes, almost all the particles were hexagonal platelets 1 to 2 micrometers in diameter and 20 nanometers thick, Feldheim and Eaton report in an upcoming Science.
 
 
 
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