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Mottramite
Mottramite

Atacamite
Atacamite



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Mottramite
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Atacamite

Mottramite and Atacamite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
-

Durability

-
-

Specific Gravity

5.93.745-3.776
1 7.18
👆🏻

Fracture

Sub-Conchoidal
Conchoidal

Cleavage

None observed
Perfect on {010}, fair on {101}

Mohs Hardness

33-3.5
2 10
👆🏻

Chemical Composition

PbCu(VO4)(OH)
Cu2Cl(OH)3

Mottramite and Atacamite Chemical Formula

While comparing Mottramite and Atacamite 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 Atacamite chemical formula.

  • Chemical formula of Mottramite- PbCu(VO4)(OH)
  • Chemical formula of Atacamite- Cu2Cl(OH)3

Mottramite and Atacamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mottramite and Atacamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mottramite and Atacamite Optical Properties during the identification of gemstone. Specific gravity of Mottramite is 3.745-3.776 whereas that of Atacamite is 3.745-3.776.