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 (pĭn′īt′, pē′nīt′)
A gray, green, or brown mineral similar to mica, formed by chemical alteration of other minerals, such as cordierite.

[After Pini, a mine in Saxony.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈpɪnaɪt; ˈpaɪ-)
(Minerals) a greyish-green or brown mineral containing amorphous aluminium and potassium sulphates
[C19: from German Pinit, named after the Pini mine, Schneeberg, Saxony]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pinite - grey or green or brown mineral similar to mica and containing aluminum and potassium sulphates
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The accessory minerals included zircon, apatite, ilmenite, sillimanite and monazite, while muscovite, chlorite, anatase, sericite and pinite were identified as the secondary minerals.
This fact can be explained by the presence of cordierite paragneiss, where cordierite weathers into pinite (mixture of sericite and chlorite).
Cordierite appears to be common in many of the rocks, though in most cases is completely retrograded to pinite or sericite making it difficult to be certain in rocks that have been completely retrograded.