Astrophyllite and Cobaltite Physical Properties

Astrophyllite

Cobaltite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.46.3

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic

1.6 Cleavage

Perfect on [001] imperfect on [100]

{100} Good, {010} Good, {001} Good

1.7 Mohs Hardness

35.5

2 10

1.8 Chemical Composition

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

CoAsSAnthony et al , Handbook of mineralogy (2001)

Astrophyllite and Cobaltite Chemical Formula

While comparing Astrophyllite and Cobaltite 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 Astrophyllite and Cobaltite chemical formula.

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

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Astrophyllite and Cobaltite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Cobaltite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Cobaltite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 6.3 whereas that of Cobaltite is 6.3.