Pollucite and Montebrasite Physical Properties

Pollucite

Montebrasite

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Physical Properties

Tenacity

Brittle

Solubility

Readily soluble in HF

Durability

Specific Gravity

2.86-2.942.98-3.10

1 7.18

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Fracture

Conchoidal, Uneven

Uneven, Conchoidal

Cleavage

None observed

{100} Perfect, {110} Good, {011} Distinct

Mohs Hardness

6.5-75.5-6

2 10

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Chemical Composition

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references

Pollucite and Montebrasite Chemical Formula

While comparing Pollucite and Montebrasite 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 Pollucite and Montebrasite chemical formula.

Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references

Compare White Gemstones

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Pollucite Vs Witherite

Pollucite Vs Xonotlite

Pollucite and Montebrasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Montebrasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Montebrasite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 2.98-3.10 whereas that of Montebrasite is 2.98-3.10.