Astrophyllite and Hibonite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
3.84
Fracture
Uneven, Brittle, Metallic
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
Perfect on [001] imperfect on [100]
{0001} good, {10 1 0} parting
Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
(Ca,Ce)(Al,Ti,Mg)12O19
Astrophyllite and Hibonite Chemical Formula
While comparing Astrophyllite and Hibonite 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 Hibonite 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 Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19
Astrophyllite and Hibonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Astrophyllite and Hibonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Hibonite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.84 whereas that of Hibonite is 3.84.