Ettringite

From Saltwiki
Ettringite[1][2]
Mineralogical name Ettringite
Chemical name Calcium aluminium sulfate hydrate
Trivial name
Chemical formula Ca6Al2(SO4)3(OH)12•26H2O
Other forms
Crystal system hexagonal
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³) 1.8 g/cm3
Molar volume
Molar weight 1255.11 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments insoluble in water
Crystal Optics
Refractive Indices no = 1.491
ne = 1.470
Birefringence Δ = 0.021
Optical Orientation negative
Pleochroism
Dispersion
Used Literature


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