tetrahedron

A Dictionary of Earth Sciences | 1999 | 281 words | Copyright

tetrahedron A four-faced crystal form in which each face is an equilateral triangle. It may be referred to three equal crystallographic axes at right angles which join the centres of opposite edges of the crystal. It is a special form within the cubic system with the symbol (111).

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AILSA ALLABY and MICHAEL ALLABY. "tetrahedron." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "tetrahedron." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-tetrahedron.html

AILSA ALLABY and MICHAEL ALLABY. "tetrahedron." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-tetrahedron.html

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