Astrophyllite and Phosgenite Physical Properties

Astrophyllite

Phosgenite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.46.13

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

1.6 Cleavage

Perfect on [001] imperfect on [100]

Distinct on {001} and {110}, indistinct on {100}

1.7 Mohs Hardness

32-3

2 10

1.8 Chemical Composition

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

Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Astrophyllite and Phosgenite Chemical Formula

While comparing Astrophyllite and Phosgenite 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 Astrophyllite and Phosgenite chemical formula.

Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Phosgenite- Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Astrophyllite and Phosgenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Phosgenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Phosgenite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 6.13 whereas that of Phosgenite is 6.13.