Muscovite

KAl2(AlSi3O10)(OH)2

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Muscovite is the most common mica and an important rock-forming silicate with the formula KAl2(AlSi3O10)(OH)2. Its perfect basal cleavage allows it to be split into extremely thin, flexible, transparent sheets, a property that led to its historical use as window glass known as Muscovy glass. The mineral crystallizes in the monoclinic system as tabular or pseudo-hexagonal books, showing a vitreous luster, a colorless streak, and colors from colorless through silver-white to pale green. Its Mohs hardness is 2 to 2.5 and its specific gravity 2.77 to 2.88. Its low hardness of 2 to 2.5 and elastic sheets are shared across the mica group, of which muscovite is the light-colored representative.

Muscovite is the most common mica mineral and an important rock-forming silicate. Its perfect basal cleavage allows it to be split into extremely thin, flexible, transparent sheets. These sheets were historically used as window glass (Muscovy glass).

晶系 Monoclinic
矿物分类 09 Silicates
莫氏硬度 2.0-2.5
比重 2.77-2.88
颜色 Colorless, silver-white, pale green
光泽 Vitreous
条痕色 Colorless
解理 Perfect basal {001}
断口 Uneven
透明度 Transparent
晶体习性 Tabular, pseudo-hexagonal books

莫氏硬度

Mohs Hardness: 2.0 – 2.5
1 Soft10 Hard
Muscovite has a Mohs hardness of 2–2.5 on the 1–10 mineral hardness scale.
莫氏硬度 Reference Mineral
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

晶系

Monoclinic
Muscovite crystallizes in the Monoclinic crystal system.
特性 Value
晶系 Monoclinic
Axial Relationships a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Frequently Asked Questions

What is the hardness of Muscovite?
Muscovite has a Mohs hardness of 2.0-2.5.
What crystal system does Muscovite belong to?
Muscovite crystallizes in the Monoclinic crystal system.
What color is Muscovite?
Muscovite is typically Colorless, silver-white, pale green.
What type of luster does Muscovite have?
Muscovite exhibits a Vitreous luster.
What is the chemical formula of Muscovite?
The chemical formula of Muscovite is KAl2(AlSi3O10)(OH)2.