Apophyllite and Astrophyllite Physical Properties

Apophyllite

Astrophyllite

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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

2.30-2.503.2-3.4

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

Uneven, Brittle, Metallic

1.6 Cleavage

Perfect on (001)

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

4.5-53

2 10

1.8 Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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

Apophyllite and Astrophyllite Chemical Formula

While comparing Apophyllite 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 Apophyllite and Astrophyllite chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
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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Apophyllite and Astrophyllite Specific Gravity

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