Difference between revisions of "Biotite"
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(New page: '''Biotite'' is a common rock-forming mineral of the mica family. Biotite is a black or dark brown silicate rich in iron, magnesium, potassium, [[alumin...) |
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| − | '''Biotite'' is a common [[rock]]-forming [[mineral]] of the [[mica]] family. Biotite is a [[black]] or dark [[brown]] [[silica]]te rich in [[iron]], [[magnesium]], [[potassium]], [[aluminum]], and, of course, [[silica]]. Like other [[mica]]s, it forms flat book-like crystals that peel apart into individual sheets on cleavage planes.<ref>http://wrgis.wr.usgs.gov/docs/parks/misc/glossaryb.html</ref> | + | '''Biotite''' is a common [[rock]]-forming [[mineral]] of the [[mica]] family. Biotite is a [[black]] or dark [[brown]] [[silica]]te rich in [[iron]], [[magnesium]], [[potassium]], [[aluminum]], and, of course, [[silica]]. Like other [[mica]]s, it forms flat book-like crystals that peel apart into individual sheets on cleavage planes.<ref>http://wrgis.wr.usgs.gov/docs/parks/misc/glossaryb.html</ref> |
==References== | ==References== | ||