Galena

PbS

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Galena is the principal ore of lead and one of the most widely distributed sulfide minerals, a lead sulfide (PbS) that crystallizes in the cubic system. Its perfect cubic cleavage and high specific gravity of 7.40 to 7.60 make it easy to recognize, along with a metallic luster and a lead-gray color and streak. Crystals are commonly cubic or octahedral, and the Mohs hardness is a low 2.5 to 2.8. Galena frequently occurs with sphalerite, calcite, and fluorite, and it often carries enough silver to be an economic byproduct source of that metal. A bright metallic luster and subconchoidal fracture accompany its diagnostic weight and cubic cleavage.

Galena is the principal ore of lead and one of the most widely distributed sulfide minerals. It commonly occurs with sphalerite, calcite, and fluorite. Its perfect cubic cleavage and high specific gravity make it easily identifiable.

결정계 Cubic (Isometric)
광물 분류 02 Sulfides and Sulfosalts
모스 경도 2.5-2.8
비중 7.40-7.60
색상 Lead-gray
광택 Metallic
조흔색 Lead-gray
벽개 Perfect cubic {001}
단구 Subconchoidal
투명도 Opaque
결정 습성 Cubic, octahedral

모스 경도

Mohs Hardness: 2.5 – 2.8
1 Soft10 Hard
Galena has a Mohs hardness of 2.5–2.8 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

Cubic (Isometric)
Galena crystallizes in the Cubic (Isometric) crystal system.
특성 Value
결정계 Cubic (Isometric)
Axial Relationships a = b = c, α = β = γ = 90°

Explore on Science FYI

ChemFYI
Lead (Pb) Primary lead ore (PbS)
ChemFYI
Sulfur (S) Sulfide mineral component

Frequently Asked Questions

What is the hardness of Galena?
Galena has a Mohs hardness of 2.5-2.8.
What crystal system does Galena belong to?
Galena crystallizes in the Cubic (Isometric) crystal system.
What color is Galena?
Galena is typically Lead-gray.
What type of luster does Galena have?
Galena exhibits a Metallic luster.
What is the chemical formula of Galena?
The chemical formula of Galena is PbS.