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Ettringite and Hollandite Physical Properties


Hollandite and Ettringite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Partially soluble in water   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
1.77   
5.05   

Fracture
Not Available   
Brittle, Metallic   

Cleavage
Perfect on {10 1 0}   
Distinct / Good, Prismatic   

Mohs Hardness
2-2.5   
4-6   

Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)   
Ba(Mn++++,Mn++)8O16   

Optical Properties >>
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Ettringite and Hollandite Chemical Formula

While comparing Ettringite and Hollandite 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 Ettringite and Hollandite chemical formula.

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Ettringite and Hollandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 5.05 whereas that of Hollandite is 5.05.

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