General Information: Chemical Formula:AlO(OH)
Composition:(Molecular Weight = 59.99 gm)
Aluminum 44.98 %
AlHydrogen 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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