Biotite

by.tylerberry Biotite is a non metalic element with a pearly luster. it is a magnetic substance. The color of it is

blackesh brown,or yellowish brown with white weavey lines gowing al through out it. Biotite dose

not break into irregular or uneven surfaces so it is cleavage. biotite dose not have any speacil

properties. Biotite is a 3 on the hardness-scale. Five intresting facts about biotite is it is a

sheet of silicate ,very high in luster,shaped monoclinic, it is in the mica group,and it has siderophyllite in it.

its commenly in electrical devices, used as a surface treatment in decritave concrete, also used in the

patasiom-argon methed of dating igneous rocks, grind it up and us as filler lubricant or dusting material to

keep asfult from sticking to gether,alterd biotite called vermiculite used for insilation.