Povondraite and Petalite Physical Properties

Povondraite

Petalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.262.40

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)

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

1.6 Cleavage

None

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

1.7 Mohs Hardness

Not Available6-6.5

2 10

1.8 Chemical Composition

NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)

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

Povondraite and Petalite Chemical Formula

While comparing Povondraite and Petalite 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 Povondraite and Petalite chemical formula.

Chemical formula of Povondraite- NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Brown Gemstones

Povondraite Vs Staurolite

Povondraite Vs Sonolite

Povondraite Vs Smoky Quartz

Povondraite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Povondraite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Povondraite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Povondraite is 2.40 whereas that of Petalite is 2.40.