General Information:
Chemical Formula:KAlSiO4
Composition:(Molecular Weight = 158.16 gm)Potassium 24.72 %
K Aluminum 17.06 %
AlSilicon 17.76 %
SiOxygen 40.46 %
O Empirical Formula: KAlSiO4
Locality:Ejecta from Mte. Somma, Vesuvius.
Physical Properties: Cleavage:[0001] Perfect
Color:colorless.
Density:2.49 - 2.67, Average = 2.58
Diaphaniety:Transparent to translucent
Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Acicular - Occurs as needle-like crystals.,
Hardness:5.5-6 - Knife Blade-Orthoclase
Luster:Vitreous - Greasy
Streak:white
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