Ettringite and Tantalite Physical Properties

Ettringite

Tantalite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.775.2

1 7.18

2.4 Fracture

Not Available

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)

2.5 Cleavage

Perfect on {10 1 0}

Good in one direction

2.6 Mohs Hardness

2-2.56-6.5

2 10

2.11 Chemical Composition

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references

Ettringite and Tantalite Chemical Formula

While comparing Ettringite and Tantalite 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 Tantalite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references

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Ettringite and Tantalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Tantalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Tantalite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 5.2 whereas that of Tantalite is 5.2.