pinacoid

A Dictionary of Earth Sciences | 1999 | 327 words | Copyright

pinacoid Applied to a crystal face which cuts the vertical c (or z) crystallographic axis and is parallel to the horizontal a (or x) and b (or y) axes. A horizontal plane of symmetry (see CRYSTAL SYMMETRY) repeats the face at the opposite end of the crystal. The resulting form is a pair of parallel faces with the index (001).

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

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

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

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