Astrophyllite and Montebrasite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
2.98-3.10
Fracture
Uneven, Brittle, Metallic
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Perfect on [001] imperfect on [100]
{100} Perfect, {110} Good, {011} Distinct
Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Astrophyllite and Montebrasite Chemical Formula
While comparing Astrophyllite and Montebrasite 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 Montebrasite 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 Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Astrophyllite and Montebrasite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Astrophyllite and Montebrasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Montebrasite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.98-3.10 whereas that of Montebrasite is 2.98-3.10.