Bornite and Astrophyllite Physical Properties

Bornite

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

5.06-5.08

3.2-3.4

1.5 Fracture

Uneven, Subconchoidal, Conchoidal, Brittle

Uneven, Brittle, Metallic

1.6 Cleavage

Poor on [111].

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

3-3.25

1.8 Chemical Composition

Cu5FeS4

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

Bornite and Astrophyllite Chemical Formula

While comparing Bornite 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 Bornite and Astrophyllite chemical formula.

Chemical formula of Bornite- Cu5FeS4
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

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Bornite and Astrophyllite Specific Gravity

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