Dolomite

CaMg(CO3)2

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A calcium magnesium carbonate (CaMg(CO3)2), dolomite lends its name to the rock dolostone that it composes. It crystallizes in the trigonal system, and its rhombohedral crystals often develop curved, saddle-shaped faces that are diagnostic. The mineral is transparent to translucent with a vitreous luster, a white streak, and perfect rhombohedral cleavage; colors include colorless, white, pink, gray, and brown. Its Mohs hardness ranges from 3.5 to 4 and its specific gravity from 2.84 to 2.86. Dolomite is distinguished from calcite by its markedly weaker reaction with cold dilute hydrochloric acid. Its rhombohedral crystals with curved faces, together with a subconchoidal fracture, help distinguish hand specimens.

Dolomite is a calcium magnesium carbonate that forms the rock dolomite (dolostone). Its curved, saddle-shaped crystal faces are distinctive. It is distinguished from calcite by its weaker reaction with dilute hydrochloric acid.

결정계 Trigonal
광물 분류 05 Carbonates and Nitrates
모스 경도 3.5-4.0
비중 2.84-2.86
색상 Colorless, white, pink, gray, brown
광택 Vitreous
조흔색 White
벽개 Perfect rhombohedral {1011}
단구 Subconchoidal
투명도 Transparent
결정 습성 Rhombohedral with curved faces (saddle-shaped)

모스 경도

Mohs Hardness: 3.5 – 4.0
1 Soft10 Hard
Dolomite has a Mohs hardness of 3.5–4 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

Trigonal
Dolomite crystallizes in the Trigonal crystal system.
특성 Value
결정계 Trigonal (Rhombohedral)
Axial Relationships a = b = c, α = β = γ ≠ 90°

Frequently Asked Questions

What is the hardness of Dolomite?
Dolomite has a Mohs hardness of 3.5-4.0.
What crystal system does Dolomite belong to?
Dolomite crystallizes in the Trigonal crystal system.
What color is Dolomite?
Dolomite is typically Colorless, white, pink, gray, brown.
What type of luster does Dolomite have?
Dolomite exhibits a Vitreous luster.
What is the chemical formula of Dolomite?
The chemical formula of Dolomite is CaMg(CO3)2.