Ettringite and Ludlamite Physical Properties
Solubility
Partially soluble in water
-
Specific Gravity
1.77
3.1-3.2
Cleavage
Perfect on {10 1 0}
Vitreous, pearly on cleavage
Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ettringite and Ludlamite Chemical Formula
While comparing Ettringite and Ludlamite 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 Ettringite and Ludlamite chemical formula.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ettringite and Ludlamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ettringite and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.