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Homework Help: Bragg diffraction / Solid state physics

  1. Oct 16, 2011 #1
    1. The problem statement, all variables and given/known data

    2a93055.jpg

    2. Relevant equations


    [tex] n\lambda = 2dsin(\theta) [/tex]


    3. The attempt at a solution

    a)

    solving for d I get
    [tex]\frac{n*\lambda}{2*sin*(\theta)} = d [/tex]

    substituting in the first value 50.85 to solve for d, with n=1
    I get d= 1.754*10^-10m

    How do I solve the miller indices from the inter particle spacing?

    I do not know a, the length of the side of a cubic cell of the crystal
    can I just use 1 for that?

    [tex] d= \frac{{n*a}{h^2+k^2+l^2}} [/tex]

    h k l being the indices, all of which are integers
     
    Last edited: Oct 16, 2011
  2. jcsd
  3. Oct 16, 2011 #2
    How do i determine the lattice constant a?

    I know it's a cubic crystalline material
    and I know the diffraction angles but how do i figure a out!
     
  4. Oct 16, 2011 #3
    Are there alternative methods to solving the miller indices?
     
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