Spodumene and Poudretteite Physical Properties

Spodumene

Poudretteite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.15-3.212.51-2.53

1 7.18

1.5 Fracture

Uneven, Subconchoidal, Gemstones (2009)

Conchoidal, Splintery

1.6 Cleavage

Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°

None

1.7 Mohs Hardness

6-75

2 10

1.8 Chemical Composition

LiAlSi₂O₆

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Spodumene and Poudretteite Chemical Formula

While comparing Spodumene and Poudretteite 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 Spodumene and Poudretteite chemical formula.

Chemical formula of Spodumene- LiAlSi₂O₆
Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

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Spodumene and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spodumene and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spodumene and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Spodumene is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.