Encyclopedia.com > Dictionaries, Thesauruses, Pictures, and Press Releases > A Dictionary of Earth Sciences > January 1999

zinnwaldite

A Dictionary of Earth Sciences | 1999 | 537 words | Copyright

zinnwaldite A member of the mica group of 2:1 phyllosilicates (sheet silicates) with formula K2(Fe2+ 2−1,Li2−3,Al2)[Si6−7 Al2−1O20](F,OH)4; sp. gr. 2.9–3.2; hardness 2–3; monoclinic; grey, brown, or even dark green; vitreous to pearly lustre; forms thick, tabular crystals; cleavage well marked; occurs in granites and pegmatites in association with scheelite, wolframite, cassiterite, and fluorite. It is pneumatolytic in origin (see PNEUMATOLYSIS). It is named after Zinnwald, Saxony, Germany.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

AILSA ALLABY and MICHAEL ALLABY. "zinnwaldite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "zinnwaldite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O13-zinnwaldite.html

AILSA ALLABY and MICHAEL ALLABY. "zinnwaldite." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-zinnwaldite.html

Learn more about citation styles

Find thousands of answers for hundreds of subjects at Answers Encyclopedia .

All answers verified by trusted sources at Encyclopedia.com

Try Answers Encyclopedia now!

For students and teachers!

Encyclopedia.com provides students and teachers facts, information, and biographies from verified, citable sources, including:

Encyclopedia.com provides students and teachers facts, information, and biographies from verified, citable sources, including: