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Likewise, the triangulated layers of spheres (atoms) can be stacked
vertically in |
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the
eclipsed formation or staggered. |
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click image |
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to
enlarge |
overhead view |
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Figure 35 - Simple hexagonal (HP) packing of spheres |
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Simple hexagonal packing (HP) |
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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 |
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can be
modeled as a space filling of trigonal and hexagonal prisms. |
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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 |
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the same layer and one sphere on top
of and
below it in the adjacent layers. |
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Back to
Knowhere |
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Page
26 - Structure matters - HP packing |
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