File:EB1911 Mica - crystal diagram (1).jpg

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EB1911_Mica_-_crystal_diagram_(1).jpg (324 × 163 pixels, file size: 17 KB, MIME type: image/jpeg)

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English: Mica crystal diagram: The crystal represented is bounded by the basal pinacoid c (001) parallel to which is the perfect cleavage, the clinopinacoid b (010) parallel to the plane of symmetry, and the pyramids m (221) and o (112). The angles between these pyramids and the basal plane are 85½° and 73° respectively.
Date published 1911
Source “Mica,” Encyclopædia Britannica (11th ed.), v. 18, 1911, p. 355, fig. 1.
Author Leonard James Spencer
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Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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current16:17, 20 July 2018Thumbnail for version as of 16:17, 20 July 2018324 × 163 (17 KB)Library Guy (talk | contribs){{Information |description ={{en|1=Mica crystal diagram: The crystal represented is bounded by the basal pinacoid ''c'' (001) parallel to which is the perfect cleavage, the clinopinacoid ''b'' (010) parallel to the plane of symmetry, and the pyramids ''m'' (221) and ''o'' (112). The angles between these pyramids and the basal plane are 85½° and 73° respectively.}} |date =published 1911 |source =“Mica,” ''Encyclopædia Britannica'' (11th ed.), v. 18, 1911, p. 355, fig. 1. |au...

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