![]() ![]() When cooled quickly, the chains tightly align, giving PFO a close packing factor, though because of the high complexity of the chains, this sometimes gets messy and creates the amorphous state.Īssuming one atom per lattice point, in a primitive cubic lattice with cube side length " a ", the sphere radius would be and the atomic packing factor turns out to be about 0.524 ( which is quite low ). The atomic packing factor runs around 68-74 % in a crystal, and might be a bit worse with an amorphous solid, let's say 50 %. The coordination number of atoms in hcp and fcc structures is 12 and its atomic packing factor ( APF ) is the number mentioned above, 0.74. ![]() This is done by treating each cell as a single point and using spatial statistics such as the Effective Radius, Packing Factor and Regularity Index. ![]() Zincblende structures have higher packing factors than 0.34 depending on the relative sizes of their two component atoms. The atomic packing factor is the proportion of space filled by these spheres. One important characteristic of a crystalline structure is its atomic packing factor. ![]()
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