Petalite and Vivianite Physical Properties

Petalite

Vivianite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.402.64-2.70

1 7.18

1.5 Fracture

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

(e.g. graphite).

1.6 Cleavage

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

{010} Perfect

1.7 Mohs Hardness

6-6.5Not Available

2 10

1.8 Chemical Composition

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

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Petalite and Vivianite Chemical Formula

While comparing Petalite and Vivianite 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 Vivianite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Compare Gems Found In Australia

Petalite Vs Scheelite

Petalite Vs Scolecite

Petalite Vs Sapphire

Petalite and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.