Sodalite

Na4Al3Si3O12Cl

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Sodalite is a royal-blue tectosilicate (Na4Al3Si3O12Cl) named for its sodium content and widely worked as an ornamental gemstone. It crystallizes in the cubic system, usually massive and only rarely as dodecahedral crystals, showing a vitreous luster, a white streak, poor {110} cleavage, and a conchoidal fracture. Colors include rich royal blue, violet-blue, gray, and white, with a Mohs hardness of 5.5 to 6 and a specific gravity from 2.14 to 2.40. Unlike the similarly colored lapis lazuli, sodalite rarely contains pyrite and shows a more even, uniform blue. A Mohs hardness of 5.5 to 6 and a conchoidal fracture accompany the deep blue that makes the mineral desirable for carving.

Sodalite is a royal-blue tectosilicate mineral named for its sodium content. It is widely used as an ornamental gemstone. Unlike the similarly colored lapis lazuli, sodalite rarely contains pyrite and its blue color is more even and uniform.

晶系 Cubic (Isometric)
矿物分类 09 Silicates
莫氏硬度 5.5-6.0
比重 2.14-2.40
颜色 Rich royal blue, violet-blue, gray, white
光泽 Vitreous
条痕色 White
解理 Poor {110}
断口 Conchoidal to uneven
透明度 Translucent
晶体习性 Massive, dodecahedral (rare)

莫氏硬度

Mohs Hardness: 5.5 – 6.0
1 Soft10 Hard
Sodalite has a Mohs hardness of 5.5–6 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

Cubic (Isometric)
Sodalite crystallizes in the Cubic (Isometric) crystal system.
特性 Value
晶系 Cubic (Isometric)
Axial Relationships a = b = c, α = β = γ = 90°

Frequently Asked Questions

What is the hardness of Sodalite?
Sodalite has a Mohs hardness of 5.5-6.0.
What crystal system does Sodalite belong to?
Sodalite crystallizes in the Cubic (Isometric) crystal system.
What color is Sodalite?
Sodalite is typically Rich royal blue, violet-blue, gray, white.
What type of luster does Sodalite have?
Sodalite exhibits a Vitreous luster.
What is the chemical formula of Sodalite?
The chemical formula of Sodalite is Na4Al3Si3O12Cl.