Pyrophyllite and Montebrasite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.65-2.90
2.98-3.10
Fracture
Gemstones (2009), Flexible Flexible fragments.
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
{001} Perfect
{100} Perfect, {110} Good, {011} Distinct
Mohs Hardness
Not Available
5.5-6
Chemical Composition
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Pyrophyllite and Montebrasite Chemical Formula
While comparing Pyrophyllite and Montebrasite 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 Pyrophyllite and Montebrasite chemical formula.
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Pyrophyllite and Montebrasite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Montebrasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Montebrasite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 2.98-3.10 whereas that of Montebrasite is 2.98-3.10.