General Information:
Chemical Formula:
Fe+++2As+++4(O,OH)9
Composition:
(Molecular Weight = 556.38 gm)
Iron 20.08 % Fe
Arsenic 53.86 % As
Hydrogen 0.18 % H
Oxygen 25.88 % O
Empirical Formula:
Fe3+2As4O8(OH)
Environment:
In vugs in loellingite.
IMA Status:
Approved IMA 1973
Locality:
Karibib lithium pegmatite, Namibia.
Name Origin:
Named for the locality.
Physical Properties:
Color:
brownish yellow.
Density:
4.07
Habits:
Fibrous - Crystals made up of fibers., ,
Hardness:
1-2 - Between Talc and Gypsum
Luminescence:
Fluorescent, Short UV=yellow.
Streak:
light yellow
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