Astrophyllite and Powellite Physical Properties

Astrophyllite

Powellite

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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

3.2-3.44.23

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

Perfect on [001] imperfect on [100]

{111} Distinct

1.7 Mohs Hardness

33.5-4

2 10

1.8 Chemical Composition

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

CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Astrophyllite and Powellite Chemical Formula

While comparing Astrophyllite and Powellite 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 Powellite 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 Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Astrophyllite and Powellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Powellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Powellite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 4.23 whereas that of Powellite is 4.23.