PURPOSE: Visualization of a crystal fault within a simple crystal structure.

DESCRIPTION: A monolayer of BBs sandwiched between two glass plates forms this crystal model. When it is moved around and/or oriented vertically the BBs form a "crystal" arrray with a hexagonal structure and lots of "faults," as seen in the photograph.

SUGGESTIONS:

REFERENCES: (PIRA 1R50.40)

EQUIPMENT: Monolayer crystal model.

SETUP TIME: None.