$48.00

A 0.1g sample of stabilized crystalline black Arsenic.  This extremely rare allotrope of Arsenic (not to be confused with black glassy Arsenic) is unstable under normal conditions. This sample is stabilized with approximately 40% of crystalline black Phosphorus.  Black As is also a semiconductor with much the same physical and chemical properties as Black P.  It has a similar layered structure.

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