Alumotungstite

General Information:
 Chemical Formula:
(W,Al)(O,OH)3 (?)
 Composition:
(Molecular Weight = 216.36 gm)
Aluminum 1.25 % Al
Hydrogen 0.09 % H 
Tungsten 76.48 % W 
Oxygen 22.18 % O 
 Empirical Formula:
W0.9Al0.1O2.8(OH)0.2
 Locality:
Kramat Pulai mine, Kinta district, Perak, Malaysia.
 Name Origin:
Named for the composition.
Physical Properties:
 Color:
greenish yellow.
 Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
 Streak:
yellow
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