Astrophyllite and Adamite Physical Properties

Astrophyllite

Adamite

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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

3.2-3.44.32-4.48

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Perfect on [001] imperfect on [100]

{101}, good; {010}, poor

1.7 Mohs Hardness

33.5

2 10

1.8 Chemical Composition

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

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

Astrophyllite and Adamite Chemical Formula

While comparing Astrophyllite and Adamite 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 Astrophyllite and Adamite chemical formula.

Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

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Astrophyllite and Adamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Adamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Adamite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 4.32-4.48 whereas that of Adamite is 4.32-4.48.