Copper

Cu

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Among the first metals worked by humans, native copper appears in artifacts dating back more than ten thousand years. It is a native element with a copper-red color that tarnishes to brown or green, crystallizing in the cubic system and forming dendritic, massive, or wire-like habits. The metal shows a metallic luster, a copper-red streak, no cleavage, and a hackly fracture; its Mohs hardness is 2.5 to 3 and its specific gravity 8.90. Native copper occurs in basaltic lava flows and sandstone deposits, and the Keweenaw Peninsula in Michigan yielded enormous masses of the pure metal. Its softness, malleability, and hackly fracture reflect the ductile behavior typical of the native metals.

Native copper was one of the first metals used by humans, with artifacts dating back over 10,000 years. It occurs in basaltic lava flows and sandstone deposits. The Keweenaw Peninsula in Michigan produced enormous masses of native copper.

晶系 Cubic (Isometric)
矿物分类 01 Native Elements
莫氏硬度 2.5-3.0
比重 8.90
颜色 Copper-red, tarnishes to brown/green
光泽 Metallic
条痕色 Copper-red
解理 None
断口 Hackly
透明度 Opaque
晶体习性 Dendritic, massive, wire-like

莫氏硬度

Mohs Hardness: 2.5 – 3.0
1 Soft10 Hard
Copper has a Mohs hardness of 2.5–3 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)
Copper 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 Copper?
Copper has a Mohs hardness of 2.5-3.0.
What crystal system does Copper belong to?
Copper crystallizes in the Cubic (Isometric) crystal system.
What color is Copper?
Copper is typically Copper-red, tarnishes to brown/green.
What type of luster does Copper have?
Copper exhibits a Metallic luster.
What is the chemical formula of Copper?
The chemical formula of Copper is Cu.