Astrophyllite and Hodgkinsonite Physical Properties

Astrophyllite

Hodgkinsonite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.44.06-4.08

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

Perfect on [001] imperfect on [100]

{???} Perfect

1.7 Mohs Hardness

34.5-5

2 10

1.8 Chemical Composition

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

Mn2+ Zn 2SiO 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Astrophyllite and Hodgkinsonite Chemical Formula

While comparing Astrophyllite and Hodgkinsonite 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 Hodgkinsonite 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 Hodgkinsonite- Mn2+ Zn 2SiO 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Astrophyllite and Hodgkinsonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Hodgkinsonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Hodgkinsonite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 4.06-4.08 whereas that of Hodgkinsonite is 4.06-4.08.