Retzian-(Ce)

General Information:
 Chemical Formula:
Mn2Ce(AsO4)(OH)4
 Composition:
(Molecular Weight = 456.94 gm)
Cerium 30.66 % Ce
Manganese 24.05 % Mn
Arsenic 16.40 % As
Hydrogen 0.88 % H 
Oxygen 28.01 % O 
 Empirical Formula:
Mn2+2Ce(AsO4)(OH)4
 IMA Status:
Approved IMA 1987
Physical Properties:
 Cleavage:
None
 Color:
dark brown.
 Density:
4.15
 Diaphaniety:
Subtranslucent
 Hardness:
4 - Fluorite
 Luster:
Vitreous - Greasy
 Streak:
light brown
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