Petalite and Ettringite Physical Properties

Petalite

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.401.77

1 7.18

1.5 Fracture

Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal

Not Available

1.6 Cleavage

Perfect on {001}, poor on {201} with 38.5° angle between the two

Perfect on {10 1 0}

1.7 Mohs Hardness

6-6.52-2.5

2 10

1.8 Chemical Composition

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Petalite and Ettringite Chemical Formula

While comparing Petalite and Ettringite 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 Petalite and Ettringite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems Found In Australia

Petalite Vs Scheelite

Petalite Vs Scolecite

Petalite Vs Sapphire

Petalite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 1.77 whereas that of Ettringite is 1.77.