Polymorf - Knowhwere- HP packing

Likewise, the triangulated layers of spheres (atoms) can be stacked vertically in

the eclipsed formation or staggered.

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click image
to enlarge			overhead view


Figure 35 - Simple hexagonal (HP) packing of spheres
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Simple hexagonal packing (HP)

Stacking them vertically results in the simple hexagonal or hexagonal primitive

(HP) packing arrangement. It is called this because each sphere is coordinated with

six surrounding spheres in the same layer. Atoms packed together in this way can

can be modeled as a space filling of trigonal and hexagonal prisms.



	Figure 36 - HP polyhedral framework model
	( 30 T, 35 S, 79 pinges)
	click image to enlarge
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Each sphere has a coordination number of eight - the six surrounding spheres in

the same layer and one sphere on top of and below it in the adjacent layers.

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