General Information:
Chemical Formula:
AlO(OH)
Composition:
(Molecular Weight = 59.99 gm)
Aluminum 44.98 % Al
Hydrogen 1.68 % H
Oxygen 53.34 % O
Empirical Formula:
AlO(OH)
Environment:
Major constituent of most bauxite ores.
Locality:
Subtropical areas (Jamaica, Surinam, Guyana, Georgia, USA. France, Hungary, Russia, Greece, Australia, and Guinea) of high rainfall where lateritic soils can develop on Al-bearing igne ous rocks.
Name Origin:
Named after the German geologist and paleontologist, J. Bohm (1857-1938).
Physical Properties:
Cleavage:
[010] Good
Color:
white, light yellow, or yellowish green.
Density:
3 - 3.07, Average = 3.03
Diaphaniety:
Translucent
Habits:
Pistolitic - > 3mm rounded spherical grains., Massive - Uniformly indistinguishable crystals forming large masses.,
Hardness:
3 - Calcite
Luster:
Vitreous - Pearly
Streak:
white
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