Biotite and Friedelite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.7-3.3
3.06-3.19
Fracture
Uneven, Even, Yellow, White
UnevenArthur Thomas, Gemstones (2009) Tough, UnevenArthur Thomas, Gemstones (2009) Tough, Brittle, Uneven
Cleavage
Perfect on the {001}
{010} Perfect
Mohs Hardness
2.5-3.0
4-5
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
Biotite and Friedelite Chemical Formula
While comparing Biotite and Friedelite 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 Biotite and Friedelite chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Friedelite- Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
Biotite and Friedelite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Friedelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Friedelite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.06-3.19 whereas that of Friedelite is 3.06-3.19.