Pollucite and Astrophyllite Physical Properties
Solubility
Readily soluble in HF
-
Specific Gravity
2.86-2.94
3.2-3.4
Fracture
Conchoidal, Uneven
Uneven
Cleavage
None observed
Perfect on [001] imperfect on [100]
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Pollucite and Astrophyllite Chemical Formula
While comparing Pollucite 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 Pollucite and Astrophyllite chemical formula.
- Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Pollucite and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pollucite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.