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.
| النظام البلوري | Monoclinic |
| صنف المعدن | 09 Silicates |
| صلادة موس | 2.5-3.0 |
| الكثافة النوعية | 2.70-3.40 |
| اللون | Black, dark brown, dark green |
| اللمعان | Vitreous |
| لون الخط | White to gray |
| الانفصام | Perfect basal {001} |
| الكسر | Uneven |
| الشفافية | Translucent |
| الشكل البلوري | Tabular, pseudo-hexagonal |
صلادة موس
Mohs Hardness: 2,5 – 3,0
1 Soft10 Hard
النظام البلوري
MonoclinicFrequently 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.