Austinite and Astrophyllite Physical Properties

Austinite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Easily soluble in cold dilute HCl

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.123.2-3.4

1 7.18

1.5 Fracture

Brittle, Uneven, Brittle, Uneven

Uneven, Brittle, Metallic

1.6 Cleavage

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

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

4-4.53

2 10

1.8 Chemical Composition

CaZn(AsO4)(OH)

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

Austinite and Astrophyllite Chemical Formula

While comparing Austinite and Astrophyllite 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 Astrophyllite chemical formula.

Chemical formula of Austinite- CaZn(AsO4)(OH)
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Green Gemstones

Austinite Vs Apophyllite KF

Austinite Vs Clintonite

Austinite Vs Cordierite

Austinite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.