Alunite and Nosean Physical Properties
Tenacity
Brittle
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.6-2.9
2.30-2.40
Fracture
Conchoidal, Uneven
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
On {0001}, perfect
{110} Perfect
Mohs Hardness
3.5-4
Not Available
Chemical Composition
KAl3(SO4)2(OH)6
Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)
Alunite and Nosean Chemical Formula
While comparing Alunite and Nosean 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 Alunite and Nosean chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Nosean- Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)
Alunite and Nosean Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Nosean Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Nosean Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.30-2.40 whereas that of Nosean is 2.30-2.40.