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icosahedral group
(redirected from Icosahedral symmetry)

   Also found in: Wikipedia 0.01 sec.
icosahedral group [ī‚käs·ə¦hē·drəl ′grüp]
(mathematics)
The group of motions of three-dimensional space that transform a regular icosahedron into itself.


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Using mathematical arguments and evidence for icosahedral symmetry in X-ray analyses of various viruses, Caspar and Klug proposed that those viruses referred to as spherical viruses--because under microscopes look like balls--actually have icosahedral symmetry.
It had long been known that icosahedral symmetry is not allowed for a periodic object (2).
The icosahedral symmetry of the phase was demonstrated by carefully constructing a reciprocal lattice using a series of selected area electron diffraction.
 
 
 
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