513.001 Molecular and Solid State Physics

Return to
problem list

Wolfram Alpha

Physical
Constants

Periodic System
of Elements

      

Ionic crystal

(a) Determine the Madelung constant for NaCl including only the nearest neighbors and the next nearest neighbors in the sum.

(b) The cohesive energy of NaCl can be described by the function,

Here R is the interatomic spacing and z is the number of nearest neighbors. λ,ρ and α are constants. How could you determine the density of NaCl from this expression?