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| Description: Rock-forming silicates Groups based upon tetrahedral arrangement Micas – tetrahedra are arranged in sheets Two types of mica are biotite (dark) and muscovite (light) Feldspars – Three-dimensional network of tetrahedra Rock-forming silicates Groups based upon tetrahedral arrangement Feldspars – most abundant group of minerals in Earth’s crust Quartz – three-dimensional network of tetrahedra Picture Stats: Views: 221 Filesize: 169.11kB Height: 752 Width: 1305 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39364 |