Mottramite and Cinnabar Physical Properties

Mottramite

Cinnabar

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Physical Properties

Tenacity

Brittle

Slightly sectile

Solubility

Soluble

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

Durability

Specific Gravity

5.92

1 7.18

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Fracture

Sub-Conchoidal

Uneven

Cleavage

None observed

Prismatic {10 1 0}, perfect

Mohs Hardness

32-2.5

2 10

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Chemical Composition

PbCu(VO4)(OH)

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

Mottramite and Cinnabar Chemical Formula

While comparing Mottramite 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 Mottramite and Cinnabar chemical formula.

Chemical formula of Mottramite- PbCu(VO4)(OH)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Mottramite and Cinnabar Specific Gravity

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