Parabrandtite

General Information:
 Chemical Formula:
Ca2Mn++(AsO4)·2(H2O)
 Composition:
(Molecular Weight = 448.96 gm)
Calcium 17.85 % Ca
Manganese 12.24 % Mn
Arsenic 33.38 % As
Hydrogen 0.90 % H 
Oxygen 35.64 % O 
 Empirical Formula:
Ca2Mn2+(AsO4)2·2(H2O)
 Environment:
Found in a cavity in primary ore at Sterling.
 IMA Status:
Approved IMA
 Locality:
Sterling Hill mine, Susex County, New Jersey, USA.
 Name Origin:
Named for its dimorphic relationship to brandtite.
Physical Properties:
 Cleavage:
[010] Perfect, [110] Perfect
 Color:
colorless.
 Density:
3.55
 Diaphaniety:
Transparent
 Habits:
Aggregates - Made of numerous individual crystals or clusters., ,
 Hardness:
3-4 - Calcite-Fluorite
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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