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12-28. Diamond(b) #05

A mineral goes Sierpinski!

This is a front view of a diamond crystal unit cell. In the background, the mineral’s polyhedral structure. In the foreground, the carbon atoms in a 4/m symmetry pattern.

From a resource by M. Straumanis and E. Aka.

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10-30

10-30. Graphite#2.

The graphite crystal has such an elegant minimal symmetry, it brings to mind mathematician Sierpinski fractal visualization, in particular, the triangle series called the Sierpinski gasket.

From a resource by R. Wyckoff.

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