| |
| | Highbeam Encyclopedia - Search Results for mica (Site not responding. Last check: 2007-09-08) |
 | | mica, general term for a large group of minerals, hydrous silicates of aluminum and potassium, often containing magnesium, ferrous iron, ferric iron, sodium, and lithium and more rarely containing barium, chromium, and fluorine. |
 | | The chief minerals in syenite are the feldspars, with mica, hornblende, and pyroxene. |
 | | Rhyolite is chemically the equivalent of granite, and is thus composed primarily of quartz and orthoclase feldspar with subordinate amounts of plagioclase feldspar, biotite mica, amphiboles, and pyroxenes. |
| www.encyclopedia.com /SearchResults.aspx?Q=mica (645 words) |
|