General Information:
Chemical Formula:
KAlSi2O6
Composition:
(Molecular Weight = 218.25 gm)
Potassium 17.91 % K
Aluminum 12.36 % Al
Silicon 25.74 % Si
Oxygen 43.99 % O
Empirical Formula:
KAl(Si2O6)
Environment:
Acid volcanic rocks.
IMA Status:
Approved IMA
Locality:
Bearpaw Mountains., Montana, USA.
Name Origin:
From the Greek leukos - "white."
Physical Properties:
Cleavage:
[110] Indistinct
Color:
colorless, gray, yellow gray, or white.
Density:
2.47
Diaphaniety:
Translucent to transparent
Habits:
Crystalline - Coarse - Occurs as well-formed coarse sized crystals., ,
Hardness:
6 - Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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