General Information:
Chemical Formula:
Cu(UO2)2(PO4)2·8-12(H2O)
Composition:
(Molecular Weight = 991.71 gm)
Uranium 48.00 % U
Copper 6.41 % Cu
Phosphorus 6.25 % P
Hydrogen 2.24 % H
Oxygen 37.11 % O
Empirical Formula:
Cu(UO2)2(PO4)2·11(H2O)
Name Origin:
Named after the Swedish chemist, Tornbern Bergmann (1735-1784).
Physical Properties:
Cleavage:
[001] Perfect, [100] Distinct
Color:
green, grass green, leek green, apple green, or siskin green.
Density:
3.2
Diaphaniety:
Transparent to subtranslucent
Habits:
Tabular - Form dimensions are thin in one direction., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Foliated - Two dimensional platy forms.
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
Fluorescent and radioactive, Short UV=yellow, Long UV=yellow.
Luster:
Vitreous - Pearly
Streak:
pale green
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