Hollandite and Pyrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
5.05
2.65-2.90
Fracture
Brittle, Metallic
Gemstones (2009), Flexible Flexible fragments.
Cleavage
Distinct / Good, Prismatic
{001} Perfect
Mohs Hardness
4-6
Not Available
Chemical Composition
Ba(Mn++++,Mn++)8O16
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Hollandite and Pyrophyllite Chemical Formula
While comparing Hollandite and Pyrophyllite 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 Pyrophyllite chemical formula.
- Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Hollandite and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hollandite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.