Asselbornite

General Information:
 Chemical Formula:
(Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12·3(H2O)
 Composition:
(Molecular Weight = 3,228.32 gm)
Barium 2.13 % Ba
Uranium 44.24 % U 
Bismuth 25.89 % Bi
Arsenic 4.64 % As
Hydrogen 0.56 % H 
Lead 3.21 % Pb
Oxygen 19.33 % O 
 Empirical Formula:
Pb0.5Ba0.5(UO2)6Bi4O4(AsO4)2(OH)12·3(H2O)
 Environment:
In quartz gangue from a mine.
 Locality:
Walpurgis vein, Weisser Hirsch, Neustadtel, Schneeberg, Saxony, Germany.
 Name Origin:
Named for Eric Asselborn (1954-), mineral collector and surgeon, Montrevel-en-Bresse, France.
Physical Properties:
 Cleavage:
None
 Color:
brown or lemon yellow.
 Density:
5.6
 Diaphaniety:
Translucent
 Habits:
Euhedral Crystals - Occurs as well-formed crystals showing good external form., ,
 Hardness:
3 - Calcite
 Luster:
Adamantine - Greasy
 Streak:
lemon
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