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Helices of Tetrahedra

Tetrahedra are arranged along helices connected at vertices. Groups of such helices are placed side by side. If a group contains two helices, then the structure can be regarded as a model of a quartz crystal structure.

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 Sándor Kabai
"Helices of Tetrahedra"
 http://demonstrations.wolfram.com/HelicesOfTetrahedra/
 Wolfram Demonstrations Project
 Published: August 15, 2008




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