Arsenolamprite

General Information:
 Chemical Formula:
As
 Composition:
(Molecular Weight = 74.92 gm)
Arsenic 100.0 % As
 Empirical Formula:
As
 Environment:
Dimorphous with arsenic.
 IMA Status:
Proposed IMA 1999
 Locality:
Marienberg, Saxony, Germany.
 Name Origin:
Named for the composition and the Greek for brilliance, in allusion to its luster.
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
dark gray.
 Density:
5.3 - 5.58, Average = 5.44
 Diaphaniety:
Opaque
 Habits:
Acicular - Occurs as needle-like crystals., Massive - Uniformly indistinguishable crystals forming large masses.,
 Hardness:
2 - Gypsum
 Luster:
Metallic
 Streak:
black
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