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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:17, 20 July 2018 | 324 × 163 (17 KB) | Library Guy | {{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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