Afghanite and Apophyllite KF Physical Properties

Afghanite

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

2.55-2.65

2.33-2.37

1.5 Fracture

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

Uneven, Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Perfect {10 1 0}

Perfect on {001}, imperfect on {110}

1.7 Mohs Hardness

5.5-6

4.5-5

1.8 Chemical Composition

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

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Afghanite and Apophyllite KF Chemical Formula

While comparing Afghanite 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 Afghanite and Apophyllite KF chemical formula.

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

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Afghanite and Apophyllite KF Specific Gravity

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