Mica ni madini ya silicate ya hidroli ya alumini ambayo yana potasiamu, alumini, magnesiamu, chuma, lithiamu na vipengele vingine.Wasajili watano wa kawaida ni: muscovite, phlogopite, biotite, lepidolite, sericite, muscovite ina unyumbufu bora, ushupavu, upinzani wa insulation, kiwango cha juu ...
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