describe packaging in crystal
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Answer:
Packing of Atoms Within a Unit Cell
Within a crystalline material, each atom can be thought of as a sphere. These spheres are packed into unit cells. ... For a sphere in the interior of a crystal lattice, the number of spheres contacting the sphere that is being evaluated is known as the bulk coordination number.
The Solid State
Close Packing in Crystals
Most of the solids we find around ourselves are crystal solids. These crystalline shapes form due to the arrangement of constituent particles in a specific arrangement known as crystal lattices. These structures form due to close packing of their atoms. Let us study this in detail.
X‐ray crystallography is a powerful tool for the investigation of crystalline solids. In the most favorable cases, it can lead to a complete determination of the structure of the solid and the determination of the crystal packing relationship among individual molecules in the solid. This knowledge is often crucial to understanding the solid‐state chemistry of drugs. This chapter provides an overview of crystals and X‐ray crystallography. It also outlines approaches to the determination of crystal structures. A combined knowledge of the crystal structure and the Miller indices of the crystal faces allows one to visualize not only the atoms and molecules in the crystal but also the functional groups exposed on the crystal faces. Crystal‐packing drawings are a useful way to visualize the arrangement of the molecules in the crystal. In addition to crystal packing drawings, the refined X‐ray structure also provides atomic displacement parameters for each atom.