Astrophyllite and Friedelite Physical Properties

Astrophyllite

Friedelite

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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

3.2-3.43.06-3.19

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

UnevenArthur Thomas, Gemstones (2009) Tough, UnevenArthur Thomas, Gemstones (2009) Tough, Brittle, Uneven

1.6 Cleavage

Perfect on [001] imperfect on [100]

{010} Perfect

1.7 Mohs Hardness

34-5

2 10

1.8 Chemical Composition

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

Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.

Astrophyllite and Friedelite Chemical Formula

While comparing Astrophyllite and Friedelite 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 Friedelite 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 Friedelite- Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.

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Astrophyllite and Friedelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Friedelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Friedelite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.06-3.19 whereas that of Friedelite is 3.06-3.19.