Retzian-(Nd)

General Information:
 Chemical Formula:
Mn2(Nd,Ce,La)(AsO4)(OH)4
 Composition:
(Molecular Weight = 459.29 gm)
Lanthanum 3.02 % La
Cerium 9.15 % Ce
Manganese 23.92 % Mn
Arsenic 16.31 % As
Hydrogen 0.88 % H 
Neodymium 18.84 % Nd
Oxygen 27.87 % O 
 Empirical Formula:
Mn2+2Nd0.6Ce0.3La0.1(AsO4)(OH)4
 IMA Status:
Approved IMA 1987
Physical Properties:
 Cleavage:
None
 Color:
pink brown or reddish brown.
 Density:
4.45
 Diaphaniety:
Subtranslucent
 Hardness:
3-4 - Calcite-Fluorite
 Luster:
Vitreous - Dull
 Streak:
light brown
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