Erythrite and Astrophyllite Physical Properties
Tenacity
Sectile
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.06
3.2-3.4
Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Uneven, Brittle, Metallic
Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
Perfect on [001] imperfect on [100]
Mohs Hardness
Not Available
3
Chemical Composition
Co3(AsO4)2•8(H2O)
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Erythrite and Astrophyllite Chemical Formula
While comparing Erythrite and Astrophyllite 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 Erythrite and Astrophyllite chemical formula.
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Erythrite and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Erythrite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.