Apophyllite KF and Ettringite Physical Properties

Apophyllite KF

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.33-2.371.77

1 7.18

1.5 Fracture

Uneven, Brittle, Uneven, Brittle, Uneven

Not Available

1.6 Cleavage

Perfect on {001}, imperfect on {110}

Perfect on {10 1 0}

1.7 Mohs Hardness

4.5-52-2.5

2 10

1.8 Chemical Composition

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Apophyllite KF and Ettringite Chemical Formula

While comparing Apophyllite KF and Ettringite 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 Ettringite chemical formula.

Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Green Gemstones

Apophyllite KF Vs Nepouite

Apophyllite KF Vs Hauyne

Apophyllite KF Vs Langbeinite

Apophyllite KF and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apophyllite KF and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite KF and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite KF is 1.77 whereas that of Ettringite is 1.77.