General Information:
Chemical Formula:
Fe+++2(AsO4)(SO4)(OH)·7(H2O)
Composition:
(Molecular Weight = 489.79 gm)
Iron 22.80 % Fe
Arsenic 15.30 % As
Hydrogen 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
More details...