Muscovite (also known as common mica, isinglass, or potash micaEncyclopædia Britannica) is a hydrated phyllosilicate mineral of aluminium and potassium with formula KAl2(AlSi3O10)(F,OH)2, or (KF)2(Al2O3)3(SiO2)6(H2O). It has a highly perfect basal cleavage yielding remarkably thin laminae (sheets) which are often highly elastic. Sheets of muscovite 5 meters × 3 meters (16.5 feet × 10 feet) have been found in Nellore, India.
musCoviTE (alsO kNowN As commOn mica, isinGLASs, or potash mIcAEncyclopÆDia britannicA) iS a hydRated pHYllOsiLiCATE MInEral OF aluminiUm anD potassium wITH foRmuLa Kal2(ALsi3o10)(F,oh)2, oR (kF)2(al2o3)3(sio2)6(h2o). It haS a hiGHLY perfecT BaSAl cLEavaGe yieLdINg REmArkAbly thIn lamInAE (ShEets) which ARe often hIGhLy elastIc. sheetS OF mUscovite 5 meteRs × 3 meters (16.5 FEEt × 10 feet) hAVE bEEN fOund iN nEllore, iNdia.