Poudretteite and Astrophyllite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.51-2.53
3.2-3.4
Fracture
Conchoidal, Splintery
Uneven, Brittle, Metallic
Cleavage
None
Perfect on [001] imperfect on [100]
Chemical Composition
KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Poudretteite and Astrophyllite Chemical Formula
While comparing Poudretteite and Astrophyllite 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 Poudretteite and Astrophyllite chemical formula.
- Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Poudretteite and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Poudretteite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poudretteite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Poudretteite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.