Narsarsukite and Alunite Physical Properties

Narsarsukite

Alunite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.72-2.832.6-2.9

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

Conchoidal, Uneven

1.6 Cleavage

Good on {100} and {110}

On {0001}, perfect

1.7 Mohs Hardness

6-73.5-4

2 10

1.8 Chemical Composition

Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.

KAl3(SO4)2(OH)6

Narsarsukite and Alunite Chemical Formula

While comparing Narsarsukite and Alunite 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 Narsarsukite and Alunite chemical formula.

Chemical formula of Narsarsukite- Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
Chemical formula of Alunite- KAl3(SO4)2(OH)6

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Narsarsukite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Narsarsukite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Narsarsukite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Narsarsukite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.