Allanite and Esperite Physical Properties

Allanite

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

3.40-4.204.28-4.42

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

Not Available5-5.5

2 10

1.8 Chemical Composition

Not Available

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

Allanite and Esperite Chemical Formula

While comparing Allanite 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 Allanite and Esperite chemical formula.

Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

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Allanite and Esperite Specific Gravity

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