Fluorapatite and Cinnabar Physical Properties

Fluorapatite

Cinnabar

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Physical Properties

Tenacity

Slightly sectile

Solubility

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Durability

Specific Gravity

3.1-3.252

1 7.18

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Fracture

Uneven

Cleavage

Indistinct

Prismatic {10 1 0}, perfect

Mohs Hardness

52-2.5

2 10

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Chemical Composition

Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Fluorapatite and Cinnabar Chemical Formula

While comparing Fluorapatite and Cinnabar physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Fluorapatite and Cinnabar chemical formula.

Chemical formula of Fluorapatite- Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Fluorapatite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fluorapatite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fluorapatite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Fluorapatite is 2 whereas that of Cinnabar is 2.