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Phlogopite
Phlogopite

Legrandite
Legrandite



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Phlogopite
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Legrandite

Phlogopite and Legrandite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
2.78-2.85
Uneven
Perfect basal (001)
2-2.5
KMg3(Si3Al)O10(F,OH)2
 
Brittle
-
-
3.98-4.04
Conchoidal
Imperfect, poor one {100}
4.5-5
Zn 2(AsO 4)(OH) · H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Phlogopite and Legrandite Chemical Formula

While comparing Phlogopite and Legrandite 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 Phlogopite and Legrandite chemical formula.

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Phlogopite and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite Vs Legrandite during the identification of gemstone. Specific gravity of Phlogopite is whereas that of Legrandite is .