mica -
any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity
paragonite a colorless or pale brown mica with sodium
phlogopite a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum
= synonym
= antonym
= relatert ord
Wiktionary
Substantiv
mica -
Any of a group of hydrousaluminosilicateminerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic.
Wikipedia
The mica group of sheet silicate minerals includes several closely related materials having highly perfect basal cleavage. All are monoclinic with a tendency towards pseudo-hexagonal crystals and are similar in chemical composition. The highly perfect cleavage, which is the most prominent characteristic of mica, is explained by the hexagonal sheet-like arrangement of its atoms.