General Information:
Chemical Formula:
LiAl6(Si7Al)O20(OH)10
Composition:
(Molecular Weight = 882.47 gm)
Lithium 0.79 % Li
Aluminum 21.40 % Al
Silicon 22.28 % Si
Hydrogen 1.14 % H
Oxygen 54.39 % O
Empirical Formula:
LiAl7Si7O20(OH)10
Environment:
Hydrothermally altered rhyolite.
IMA Status:
Approved IMA
Locality:
Qingtian, Zhejiang Province, China.
Name Origin:
Named for "chlorite alternating with pyrophyllite".
Physical Properties:
Cleavage:
[001] Perfect
Color:
colorless or white.
Density:
2.75
Diaphaniety:
Transparent
Habits:
Lamellar - Thin laminae producing a lamellar structure., Inclusions - Generally found as inclusions in other minerals.,
Hardness:
2 - Gypsum
Luster:
Vitreous - Pearly
Streak:
white
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