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dichroite

 - 5 dictionary results

di⋅chro⋅ite

  [dahy-kroh-ahyt]
Use dichroite in a Sentence
–noun Mineralogy.
cordierite.
Origin:
1800–10; < F < Gk díchro(os) (see dichroic ) + F -ite -ite 1

cor⋅di⋅er⋅ite

  [kawr-dee-uh-rahyt]
–noun
a strongly dichroic blue mineral consisting of a silicate of magnesium, aluminum, and iron: common in metamorphic rocks.
Also called dichroite, iolite.

Origin:
1805–15; named after Pierre L. A. Cordier (1777–1861), French geologist; see -ite 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To dichroite
cor·di·er·ite   (kôr'dē-ə-rīt')   
n.  A dichroic violet-blue to gray mineral silicate of magnesium, aluminum, and sometimes iron. Also called dichroite.

[French, after Pierre L. Cordier (1777-1861), French geologist.]
di·chro·ite   (dī-krō'īt')   
n.  See cordierite.

[dichro(ic) + -ite1.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia

dichroite

blue silicate mineral that occurs as crystals or grains in igneous rocks. It typically occurs in thermally altered clay-rich sediments surrounding igneous intrusions and in schists and paragneisses. Precambrian deposits of the Laramie Range, Wyo., U.S., contain more than 500,000 tons of cordierite. Cordierite is sometimes called dichroite because of its marked pleochroism (different coloured light is transmitted in different directions). For chemical formula and detailed physical properties, see silicate mineral (table)

Learn more about dichroite with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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