Mica yog lub npe dav dav ntawm cov minerals mica. Nws yog aluminosilicate ntawm potassium, txhuas, magnesium, hlau, lithium thiab lwm yam hlau, tag nrho cov no yog layered thiab monoclinic. Lub siv lead ua yog pseudohexagonal lamellae lossis phaj zoo li, qee zaum columnar. Lub lamellar cleavage yog tiav heev, nrog iav ci thiab elastic daim ntawv. Lub refractive index ntawm mica nce nrog rau qhov nce ntawm cov hlau, los ntawm qis protrusion mus rau nruab nrab protrusion. Cov hom tsis muaj hlau yog tsis muaj xim hauv flake. Cov hlau ntau dua, qhov tsaus dua xim, thiab ntau dua polychromatic thiab absorptive.

Mica flake loj: 6-10mesh, 10-20mesh,
Hmoov mica: 200mesh, 325mesh, 600mesh, 800mesh, 1250mesh, 2000mesh, 3000mesh thiab 5000mesh.

Daim Ntawv Thov
Hauv kev lag luam, biotite feem ntau siv nws cov rwb thaiv tsev thiab cua sov tiv taus, nrog rau kev tiv thaiv acid, alkali tiv taus, compression tiv taus thiab tev tawv tiv taus, ua cov khoom siv rwb thaiv tsev ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob; qhov thib ob, nws yog siv los tsim cov qhov rai thiab cov khoom siv kho tshuab ntawm cov boilers thiab smelting furnaces. Mica chips thiab mica hmoov tuaj yeem ua tiav rau hauv mica ntawv, thiab tseem tuaj yeem hloov mica daim ntawv los tsim ntau yam khoom siv rwb thaiv tsev pheej yig thiab sib npaug tuab.