Biotite

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

Add one script tag to your page:

<div data-mineralfyi="entity" data-slug="biotite"></div>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>

Embed as an iframe:

<iframe src="https://mineralfyi.com/iframe/entity/biotite/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>

Paste the URL in WordPress, Medium, or Ghost:

https://mineralfyi.com/zh-hans/mineral/biotite/

Shields.io-compatible SVG badge:

Biotite badge ![Biotite](https://mineralfyi.com/badge/entity/biotite.svg)

Web Component:

<mineralfyi-entity slug="biotite"></mineralfyi-entity>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>

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.

晶系 Monoclinic
矿物分类 09 Silicates
莫氏硬度 2.5-3.0
比重 2.70-3.40
颜色 Black, dark brown, dark green
光泽 Vitreous
条痕色 White to gray
解理 Perfect basal {001}
断口 Uneven
透明度 Translucent
晶体习性 Tabular, pseudo-hexagonal

莫氏硬度

Mohs Hardness: 2.5 – 3.0
1 Soft10 Hard

晶系

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.