Astrophyllite and Apophyllite KF Physical Properties

Astrophyllite

Apophyllite KF

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.4

2.33-2.37

1.5 Fracture

Uneven, Brittle, Metallic

Uneven, Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Perfect on [001] imperfect on [100]

Perfect on {001}, imperfect on {110}

1.7 Mohs Hardness

4.5-5

1.8 Chemical Composition

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

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Astrophyllite and Apophyllite KF Chemical Formula

While comparing Astrophyllite and Apophyllite KF 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 Apophyllite KF 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 Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)

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Astrophyllite and Apophyllite KF Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Apophyllite KF Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.33-2.37 whereas that of Apophyllite KF is 2.33-2.37.