Astrophyllite and Hemimorphite Physical Properties
Specific Gravity
3.2-3.4
3.30-3.50
Fracture
Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Perfect on [001] imperfect on [100]
Perfect on {110}, poor on {101}, {001} rare
Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Astrophyllite and Hemimorphite Chemical Formula
While comparing Astrophyllite and Hemimorphite 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 Hemimorphite 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 Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Astrophyllite and Hemimorphite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Astrophyllite and Hemimorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Hemimorphite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.30-3.50 whereas that of Hemimorphite is 3.30-3.50.