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What is a Brillouin Zone?
A Brillouin Zone is the boundary in the reciprocal lattice where scattering will occur.
In Ewald Construction, what equation links the Incident wave vector to the reciprocal lattice?
And where does this equation only apply?
KCos(theta) = G/2
How is the diffraction Condition satisfied.
If K lies in the plane that perpendicularly bisects G
What is the primitive unit cell in Reciprocal Space?
A Brillouin Zone
What is the primitive unit cell in Real Space?
A Wigner-Seitz Cell
How do Replusive Forces come about?
-> Caused by the overlapping of the electron clouds
-> Pauli exclusion principle states "no two fermions with the same spin can occupy the same state
-> Repulsive foces vary quickly with distance, represented by the high power law.
F ∝ 1/r^13
Name all 'Primary' bonds and describe them
Covalent - Electrons are shred between neighbouring atoms
Ionic - Complete transfer of an electron from one atom to a neighbouring atom
Metallic - Electrons are de-localised
Name all 'Secondary' bonds and describe them
Van der Waals - No electron transfer (long range forces bond atoms
Hydrogen Bonds - electrostatic attraction
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