Austinite and Scapolite Physical Properties

Austinite

Scapolite

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Physical Properties

Tenacity

Brittle

Solubility

Easily soluble in cold dilute HCl

Durability

Specific Gravity

4.122.58-2.74

1 7.18

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Fracture

Uneven

ConchoidalWalter Schumann, Splintery

Cleavage

Good in two directions parallel to the prism faces {110}

{100} Distinct, {110} Distinct

Mohs Hardness

4-4.55.5-6

2 10

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Chemical Composition

CaZn(AsO4)(OH)

Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

Austinite and Scapolite Chemical Formula

While comparing Austinite and Scapolite 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 Austinite and Scapolite chemical formula.

Chemical formula of Austinite- CaZn(AsO4)(OH)
Chemical formula of Scapolite- Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

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Austinite and Scapolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Scapolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Scapolite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 2.58-2.74 whereas that of Scapolite is 2.58-2.74.