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Astrophyllite and Norbergite Physical Properties


Norbergite and Astrophyllite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.2-3.4   
3.177   

Fracture
Uneven, Brittle, Metallic   
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle   

Cleavage
Perfect on [001] imperfect on [100]   
{???} Distinct   

Mohs Hardness
3   
6-6.5   

Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)   
Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)   

Optical Properties >>
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Astrophyllite and Norbergite Chemical Formula

While comparing Astrophyllite and Norbergite 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 Norbergite chemical formula.

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Astrophyllite and Norbergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Norbergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Norbergite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.177 whereas that of Norbergite is 3.177.

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