Biotite

K(Mg,Fe)3(AlSi3O10)(OH)2

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Biotite is a common phyllosilicate mineral found in igneous and metamorphic rocks. It is distinguished from muscovite by its darker color due to iron and magnesium content. Biotite is an important indicator of metamorphic grade.

Кристаллическая система Monoclinic
Класс минерала 09 Silicates
Твёрдость по Моосу 2.5-3.0
Удельный вес 2.70-3.40
Цвет Black, dark brown, dark green
Блеск Vitreous
Черта White to gray
Спайность Perfect basal {001}
Излом Uneven
Прозрачность Translucent
Кристаллический облик Tabular, pseudo-hexagonal

Твёрдость по Моосу

Mohs Hardness: 2,5 – 3,0
1 Soft10 Hard

Кристаллическая система

Monoclinic

Frequently Asked Questions

What is the hardness of Biotite?
Biotite has a Mohs hardness of 2.5-3.0.
What crystal system does Biotite belong to?
Biotite crystallizes in the Monoclinic crystal system.
What color is Biotite?
Biotite is typically Black, dark brown, dark green.
What type of luster does Biotite have?
Biotite exhibits a Vitreous luster.
What is the chemical formula of Biotite?
The chemical formula of Biotite is K(Mg,Fe)3(AlSi3O10)(OH)2.