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Homework Help: X-ray Diffraction.

  1. Jan 7, 2009 #1
    1. The problem statement, all variables and given/known data

    A powdered sample of a simle cubic crystal with a lattice constat of 2.83 x 10^-10 m scatters X-rays of wavelength 1.54 x 10^-10 m. What is the smallest angle of scattering that will be observed from this sample?

    2. Relevant equations

    2dsinθ = nλ


    3. The attempt at a solution

    I simply used the equation above to calculate θ, but I wasn't sure what they mean by smallest angle of scattering whats this?


    Thanks.
     
  2. jcsd
  3. Jan 7, 2009 #2
    Is it 15.8 degrees?
     
  4. Jan 8, 2009 #3
    The smallest angle corresponds to the largest value of d.
    For cubic crystal this is d100=a.
     
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