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Polyhalite
Polyhalite

Londonite
Londonite



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Polyhalite
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Londonite

Polyhalite and Londonite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O
 
-
-
-
3.34
Conchoidal
None
-9999
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Polyhalite and Londonite Chemical Formula

While comparing Polyhalite and Londonite 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 Polyhalite and Londonite chemical formula.

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Polyhalite and Londonite Specific Gravity

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