Alunite and Ludlamite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.6-2.9
3.1-3.2
Fracture
Conchoidal, Uneven
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Cleavage
On {0001}, perfect
Vitreous, pearly on cleavage
Chemical Composition
KAl3(SO4)2(OH)6
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Ludlamite Chemical Formula
While comparing Alunite and Ludlamite 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 Ludlamite chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Ludlamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.