General Information:
Chemical Formula:Fe+++2(AsO4)(SO4)(OH)·7(H2O)
Composition:(Molecular Weight = 489.79 gm)Iron 22.80 %
FeArsenic 15.30 %
AsHydrogen 3.09 %
H Sulfur 6.55 %
S Oxygen 52.27 %
O Empirical Formula: Fe2+2(AsO4)(SO4)(OH)·7(H2O)
Environment:An alteration product of arsenopyrite.
IMA Status:Approved IMA 1968
Locality:Kank, near Kutna Hora, Czech Republic.
Name Origin:Named after the Czech chemist, Antonin Bukovsky (1865-1950).
Physical Properties: Cleavage:None
Color:light yellow, orange, or greenish gray.
Density:2.34
Habits:Nodular - Tuberose forms having irregular protuberances over the surface., Acicular - Occurs as needle-like crystals., Fibrous - Crystals made up of fibers.
Hardness:5 - Apatite
Luster:Vitreous - Dull
Streak:yellowish white
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