Apatite

Ca5(PO4)3(F,Cl,OH)

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Apatite refers to a group of phosphate minerals and is the reference mineral for hardness 5 on the Mohs scale. It is the main source of phosphorus for biological systems and is the mineral that makes up tooth enamel and bone mineral.

Crystal System Hexagonal
Mineral Class 08 Phosphates, Arsenates, and Vanadates
Mohs Hardness 5.0
Specific Gravity 3.16-3.22
Color Green, blue, yellow, violet, colorless
Luster Vitreous
Streak White
Cleavage Poor {0001}
Fracture Conchoidal to uneven
Transparency Transparent
Crystal Habit Prismatic, tabular

Mohs Hardness

Mohs Hardness: 5.0 – 5.0
1 Soft10 Hard

Crystal System

Hexagonal

Frequently Asked Questions

What is the hardness of Apatite?
Apatite has a Mohs hardness of 5.0.
What crystal system does Apatite belong to?
Apatite crystallizes in the Hexagonal crystal system.
What color is Apatite?
Apatite is typically Green, blue, yellow, violet, colorless.
What type of luster does Apatite have?
Apatite exhibits a Vitreous luster.
What is the chemical formula of Apatite?
The chemical formula of Apatite is Ca5(PO4)3(F,Cl,OH).