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BONDING
AND CRYSTAL STRUCTURE
· Atoms
are held together in a condensed phase by the interatomic
potential.
The nature of this potential is expected to influence the possible crystal
structures of the solid.
· Three
potentials, Metallic, Ionic, and van der Waals are non-directional.
For potentials of this type the closest packing of atoms is expected to be favored
taking into account the need for overall neutrality of the final structure
and its chemical composition.
· The
Covalent and Permanent Dipole potentials are directional, and distortion
of the bond direction will increase the energy of the system. More open
structures that reduce bond distortion might, therefore, be expected.
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