File:EB1911 Mica - crystal (2).jpg
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EB1911_Mica_-_crystal_(2).jpg (326 × 141 pixels, file size: 21 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:28, 20 July 2018 | 326 × 141 (21 KB) | Library Guy | {{Information |description ={{en|1=Mica crystal diagram: The crystal 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. The prism (110) at 90° from the basal plane is not developed as a crystal face, but is a plane of twinning, the two individuals of the twin b... |
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