Mica

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Mica
Posting date : Aug 10, 2008
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27-
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Mica   Nature and classification: Mica is a kind of silicate mineral of aluminum. It has silicon oxygen tetrahedron structure of one layer of forms in succession. It can be divided into three subtribes: muscovite、biotite and lepidolite.Muscovite includes muscovite and rare sodium glimmer, Biotite includes phlogopite、biotite、iron glimmer and black mica of manganese;Lepidolite is tiny scales full of oxidize the potassium.our factory mainly produces and processes muscovite、biotite、lepidolite.         1.Structure: its chemical formula is KAl2〔AlSiO3O10〕(OH)2   2.The chemical composition: composition SiO2 Al2O3 K2O Fe2O3 CaO Na2O MgO H2O content(%) 47.32 33.25 11.82 1.81 0.03 0.96 0.91 2.7 3.The physical-index Density(g/cm3) refractive index whiteness diameter heatproof The loss of burning moisture 2.80 1.60 70-80 >60 1000oC 2.8-2.9 <1%

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