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Unformatted text preview: c a ratio is that of the ideal value. (25) 3. (a) NaCl has a density of 2.167 g/cm 3 . What is the distance between adjacent atoms? (b) Given the distance in a), calculate the energy due to the gravitational attraction between two neighboring atoms. If these two atoms have a typical magnetic moment of that of a free electron, calculate the energy due to the magnetic dipole attraction. Lastly, compare these energies with that from the Coulomb attraction of two oppositely charged ions. (25) 4 (a) Show that the volumes of the primitive cell for sc, bcc, and fcc lattices are a 3 , 1 2 a 3 , 1 4 a 3 , respectively, where a is the length of the edge of the conventional unit cell. (b) What are the corresponding Brillouin zone volumes for the above three lattices?...
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This note was uploaded on 08/01/2008 for the course PHYSICS 141A taught by Professor Souza during the Spring '08 term at Berkeley.
- Spring '08
- Solid State Physics