Astrophyllite and Jacobsite Physical Properties

Astrophyllite

Jacobsite

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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

3.2-3.44.76-5.03

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal, Brittle

1.6 Cleavage

Perfect on [001] imperfect on [100]

None

1.7 Mohs Hardness

35.5-6.5

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

Astrophyllite and Jacobsite Chemical Formula

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

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Astrophyllite and Jacobsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Jacobsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Jacobsite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 4.76-5.03 whereas that of Jacobsite is 4.76-5.03.