General Information:
Chemical Formula:
Pb2Mn++(As+++O3)2·2(H2O)
Composition:
(Molecular Weight = 874.13 gm)
Manganese 6.28 % Mn
Arsenic 25.71 % As
Hydrogen 0.46 % H
Lead 47.41 % Pb
Oxygen 20.13 % O
Empirical Formula:
Pb2Mn2+(AsO3)3·2(H2O)
IMA Status:
Approved IMA
Locality:
Langban, Varmland, Sweden.
Name Origin:
Named for Rolnd Rouse (1943-), U. S. Mineralogist.
Physical Properties:
Cleavage:
[010] Perfect, [100] Perfect
Color:
yellow orange.
Density:
4.2 - 5.7, Average = 4.95
Diaphaniety:
Transparent
Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
Hardness:
3 - Calcite
Luster:
Vitreous - Adamantine
Streak:
yellow
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