Hollandite and Afghanite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
5.05
2.55-2.65
Fracture
Brittle, Metallic
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle
Cleavage
Distinct / Good, Prismatic
Perfect {10 1 0}
Chemical Composition
Ba(Mn++++,Mn++)8O16
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Hollandite and Afghanite Chemical Formula
While comparing Hollandite and Afghanite 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 Hollandite and Afghanite chemical formula.
- Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
- Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Hollandite and Afghanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hollandite and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.