Astrophyllite and Dumortierite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
3.26-3.41
Fracture
Uneven, Brittle, Metallic
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Perfect on [001] imperfect on [100]
Distinct on {100}, poor on {110}; parting on {001}
Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
AlAl6O3BSi3O18
Astrophyllite and Dumortierite Chemical Formula
While comparing Astrophyllite and Dumortierite 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 Astrophyllite and Dumortierite chemical formula.
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
Astrophyllite and Dumortierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Astrophyllite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.