biotite wikipedia the free encyclopedia
- ，，。 ，。、，。、。，。 . . 、，，。，.biotite wikipedia the free encyclopedia,Biotite - WikipediaBiotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula K(Mg,Fe) 3AlSi 3O 10(F,OH) 2. More generally, it refers to the dark mica series, primarily a solid-solution series between the iron-endmember annite, and the magnesium-endmember phlogopite; more aluminous.Mica - WikipediaFlake mica comes from several sources: the metamorphic rock called schist as a byproduct of processing feldspar and kaolin resources, from placer deposits, and from pegmatites. Sheet mica is considerably less abundant than flake and scrap mica, and is occasionally recovered from mining scrap and flake mica. The most.