Astrophyllite and Franklinite Physical Properties

Astrophyllite

Franklinite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.2-3.45.05-5.22

1 7.18

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Fracture

Uneven

Cleavage

Perfect on [001] imperfect on [100]

None

Mohs Hardness

35.5-6

2 10

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Chemical Composition

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

(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Astrophyllite and Franklinite Chemical Formula

While comparing Astrophyllite and Franklinite 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 Franklinite 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 Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Compare Green Gemstones

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Astrophyllite Vs Brazilianite

Astrophyllite Vs Chalcopyrite

Astrophyllite and Franklinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Franklinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Franklinite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 5.05-5.22 whereas that of Franklinite is 5.05-5.22.