Astrophyllite and Esperite Physical Properties

Astrophyllite

Esperite

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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

3.2-3.4

4.28-4.42

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic

1.6 Cleavage

Perfect on [001] imperfect on [100]

Distinct on [010] and [100] poor on [101]

1.7 Mohs Hardness

5-5.5

1.8 Chemical Composition

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

PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Astrophyllite and Esperite Chemical Formula

While comparing Astrophyllite and Esperite 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 Esperite 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 Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

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Astrophyllite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.