Olivine

(Mg,Fe)2SiO4

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A group of magnesium-iron silicates with the formula (Mg,Fe)2SiO4, olivine is abundant in the Earth's mantle and in mafic and ultramafic igneous rocks. It crystallizes in the orthorhombic system in granular or prismatic habits and is transparent with a vitreous luster, a colorless streak, poor cleavage, and a conchoidal fracture. Its green to olive coloration is characteristic, with a Mohs hardness of 6.5 to 7 and a specific gravity from 3.22 to 4.39. Olivine is among the first minerals to crystallize from a cooling basaltic magma, and its gem-quality variety is known as peridot. Its granular habit and conchoidal fracture are typical of a mineral that crystallizes early from magma and weathers readily.

지구의 맨틀에 풍부하게 존재하는 규산염 광물로, 마그네슘과 철을 포함한다.

결정계 Orthorhombic
광물 분류 09 Silicates
모스 경도 6.5-7.0
비중 3.22-4.39
색상 Green, yellow-green, olive green
광택 Vitreous
조흔색 Colorless
벽개 Poor
단구 Conchoidal
투명도 Transparent
결정 습성 Granular, prismatic

모스 경도

Mohs Hardness: 6.5 – 7.0
1 Soft10 Hard
Olivine has a Mohs hardness of 6.5–7 on the 1–10 mineral hardness scale.
모스 경도 Reference Mineral
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

결정계

Orthorhombic
Olivine crystallizes in the Orthorhombic crystal system.
특성 Value
결정계 Orthorhombic
Axial Relationships a ≠ b ≠ c, α = β = γ = 90°

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Frequently Asked Questions

What is the hardness of Olivine?
Olivine has a Mohs hardness of 6.5-7.0.
What crystal system does Olivine belong to?
Olivine crystallizes in the Orthorhombic crystal system.
What color is Olivine?
Olivine is typically Green, yellow-green, olive green.
What type of luster does Olivine have?
Olivine exhibits a Vitreous luster.
What is the chemical formula of Olivine?
The chemical formula of Olivine is (Mg,Fe)2SiO4.