Apophyllite KF and Afghanite Physical Properties

Apophyllite KF

Afghanite

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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

2.33-2.37

2.55-2.65

1.5 Fracture

Uneven, Brittle, Uneven, Brittle, Uneven

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

Perfect on {001}, imperfect on {110}

Perfect {10 1 0}

1.7 Mohs Hardness

4.5-5

5.5-6

1.8 Chemical Composition

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Apophyllite KF and Afghanite Chemical Formula

While comparing Apophyllite KF and Afghanite 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 KF and Afghanite chemical formula.

Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Compare Green Gemstones

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Apophyllite KF Vs Nepouite

Apophyllite KF Vs Langbeinite

Apophyllite KF and Afghanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apophyllite KF and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite KF and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite KF is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.