Ettringite and Wulfenite Physical Properties

Ettringite

Wulfenite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.776.50-7.00

1 7.18

1.5 Fracture

Not Available

Irregular, Brittle, Conchoidal

1.6 Cleavage

Perfect on {10 1 0}

On {011}, distinct; on {001}, {013}, indistinct

1.7 Mohs Hardness

2-2.53

2 10

1.8 Chemical Composition

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

PbMoO 4Walter Schumann , Gemstones of the world (2001)

Ettringite and Wulfenite Chemical Formula

While comparing Ettringite and Wulfenite 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 Wulfenite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Wulfenite- PbMoO 4Walter Schumann , Gemstones of the world (2001)

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Ettringite and Wulfenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Wulfenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Wulfenite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 6.50-7.00 whereas that of Wulfenite is 6.50-7.00.