Physical Properties of Mineral (Biotite)

Biotite is also a reputation used for An outsize cluster of black mica minerals that are commonly found in igneous and metamorphic rocks. These embody annite, phlogopite, siderophyllite, fluorophlogopite, fluorannite, eastonite, and many of others. These micas vary in chemical composition but are all sheet salt minerals with really similar physical properties.   

A generalized chemical composition for the biotite cluster is:K(Mg,Fe)₃ (AlSi₃O₁₀)(F,OH)₂ The name "biotite" is used among the sector and in entry-level natural science courses as a results of these minerals usually can't be distinguished whereas not optical, chemical, or x-ray ANalysis.Mica is also a rock-forming mineral found in an exceedingly wide range of crystalline igneous rocks appreciate granite, diorite, gabbro, peridotite, and pegmatite. It in addition forms to a lower place metamorphic conditions once argillaceous   rocks are exposed to heat and pressure to form rock and gneiss. although mica isn't very resistant to weathering and transforms into clay minerals, it' usually found in sediments and sandstones.

Properties of  Biotite

Mica is extremely straightforward to spot and with a bit expertise an individual are going to be ready to acknowledge it by sight. it's a black isinglass with an ideal neck and a glassy radiancy on the faces of the neckline. once mica is separated into skinny sheets, the sheets are versatile however break robust bending.

Once hold on within the light, the leaves are clear to semitransparent with a brown, grey or dark-green color. typically knowledgeable observers will acknowledge phlogopitis by its brown color.

Uses of Biotite

Biotite features a restricted variety of business uses. Ground mica is employed as a filler and dilutant in paints, as an additive for drilling mud, as an inert filler and unleash agent in rubber products, and as a non-stick surface coating on asphalt shingles and laminate roofs . it's additionally employed in the argon-potassium and argonargon ways for qualitative analysis igneous rocks.                        

          

   Physical Properties of Biotite

Chemical Classification	Dark mica
Color	Black, dark green, dark brown
Streak	White to gray, flakes often produced
Luster	Vitreous
Diaphaneity	Thin sheets are transparent to translucent, books are opaque.
Cleavage	Basal, perfect
Mohs Hardness	2.5 to 3
Specific Gravity	2.7 to 3.4
Diagnostic Properties	Dark color, perfect cleavage
Chemical Composition	K(Mg,Fe)3(AlSi3O10)(F,OH)2
Crystal System	Monoclinic
Uses	Very little industrial use