Pollucite and Pyromorphite Physical Properties

Pollucite

Pyromorphite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Readily soluble in HF

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.86-2.946.5-7.1

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

1.6 Cleavage

None observed

Imperfect- [10 1 1]

1.7 Mohs Hardness

6.5-73.5-4

2 10

1.8 Chemical Composition

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

Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Pollucite and Pyromorphite Chemical Formula

While comparing Pollucite and Pyromorphite 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 Pyromorphite 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 Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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Pollucite and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.