Pyromorphite and Astrophyllite Physical Properties

Pyromorphite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.5-7.13.2-3.4

1 7.18

1.5 Fracture

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

Uneven, Brittle, Metallic

1.6 Cleavage

Imperfect- [10 1 1]

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

3.5-43

2 10

1.8 Chemical Composition

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

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Pyromorphite and Astrophyllite Chemical Formula

While comparing Pyromorphite and Astrophyllite 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 Pyromorphite and Astrophyllite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Green Gemstones

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Pyromorphite Vs Sapphire

Pyromorphite Vs Sapphirine

Pyromorphite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.