General Information:
Chemical Formula:
LiAlSi4O10
Composition:
(Molecular Weight = 306.26 gm)
Lithium 2.27 % Li
Aluminum 8.81 % Al
Silicon 36.68 % Si
Oxygen 52.24 % O
Empirical Formula:
LiAlSi4O10
Environment:
Granitic pegmatites.
Locality:
Elba, Italy.
Name Origin:
From the Greek petalon - "leaf."
Physical Properties:
Cleavage:
[???] Perfect, [???] Imperfect
Color:
colorless, gray, yellow, yellow gray, or white.
Density:
2.39 - 2.46, Average = 2.42
Diaphaniety:
Transparent to translucent
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., ,
Hardness:
6-6.5 - Orthoclase-Pyrite
Luminescence:
Fluorescent.
Luster:
Vitreous - Pearly
Streak:
colorless
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