Atacamite and Astrophyllite Physical Properties

Atacamite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.745-3.7763.2-3.4

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Brittle

Uneven, Brittle, Metallic

1.6 Cleavage

Perfect on {010}, fair on {101}

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

3-3.53

2 10

1.8 Chemical Composition

Cu2Cl(OH)3

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Atacamite and Astrophyllite Chemical Formula

While comparing Atacamite and Astrophyllite 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 Atacamite and Astrophyllite chemical formula.

Chemical formula of Atacamite- Cu2Cl(OH)3
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Green Gemstones

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Atacamite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Atacamite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Atacamite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Atacamite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.