Biotite

﻿ B I O T I  T E

= Biotite is a mineral in the group called mica. = = The groupe mica includes minerals that include closely related materials having highly perfect basal cleavage. = = ﻿ Some of the mineral characteristics of Biotite = = Color - Dark green, Brown, or Black = = Streak - White = = Transparency - transparent to translucent = = Luster - Glossy, Pearly, or vitreous = = Cleavage - Perfect in one direction = = Fracture - Uneven when seen = = Magnetism - None = = Hardness - 2.5 = = Specific - 3.0 = = Crystal Shape - Monoclinic = = Density - 2.8 - 3.4 the average is 3.09 = = Radioactivity - Barely detectable = = Luminescence - Non-Flourescent = = Electron Density - Bulk Density = = Chemical Formula ﻿- K(Mg,Fe)3AiSl3010(OH)2 = = =

= ﻿ What is it used for? =

= ﻿ Biotite is used for mainly displays un mineral collections and some people say it's a good heat = = insulator. =

= What is it made from? = = = = ﻿It is made of Potassium, Magnesium, Aluminum, Iron, Silicon, Hydrogen, Oxygen and Flourine. =

= = = Where is it Mined? = = It's mined through quarrying and underground mining, depending on how far it is underground. It is found in Ontario, Sicily, and Russia. It is found mainly in Igneous and Metamorphic rocks. =

Made By: Luke Jacoby Max Reiter

http://en.wikipedia.org/wiki/Mica http://library.thinkquest.org/05aug/00461/biotite.html http://webmineral.com/data/Biotite.shtml