Astrophyllite and Fluorite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
slightly water soluble and in hot hydrochloric acid
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
3.00-3.25
Fracture
Uneven, Brittle, Metallic
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Perfect on [001] imperfect on [100]
Octahedral, perfect on {111}, parting on {011}
Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
CaF2
Astrophyllite and Fluorite Chemical Formula
While comparing Astrophyllite and Fluorite 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 Fluorite 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 Fluorite- CaF2
Astrophyllite and Fluorite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Astrophyllite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.