Montebrasite and Pyrophyllite Physical Properties
Specific Gravity
2.98-3.10
2.65-2.90
Fracture
Uneven, Conchoidal
-
Cleavage
{100} Perfect, {110} Good, {011} Distinct
{001} Perfect
Mohs Hardness
5.5-6
-9999
Chemical Composition
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Montebrasite and Pyrophyllite Chemical Formula
While comparing Montebrasite 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 Montebrasite and Pyrophyllite chemical formula.
- Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Montebrasite and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Montebrasite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Montebrasite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Montebrasite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.