Adamite and Atacamite Physical Properties

Adamite

Atacamite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.32-4.48

3.745-3.776

1.5 Fracture

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

Conchoidal, Conchoidal, Brittle

1.6 Cleavage

{101}, good; {010}, poor

Perfect on {010}, fair on {101}

1.7 Mohs Hardness

3.5

3-3.5

1.8 Chemical Composition

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

Cu2Cl(OH)3

Adamite and Atacamite Chemical Formula

While comparing Adamite 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 Adamite and Atacamite chemical formula.

Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Chemical formula of Atacamite- Cu2Cl(OH)3

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Adamite and Atacamite Specific Gravity

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