1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: X-ray diffraction pattern

  1. Apr 28, 2009 #1
    2vbon80.jpg

    I want to find which elements and planes the intensity peaks in this graph comes from. The X-rays in the diffractometer are have a wavelength of 0.709 Å. The [tex]2 \theta[/tex] values for the peaks (including double peaks) are: 11.84, 19.56, 20.04, 23.28, 33.88 and 39.16.

    Nickel, iron, silicon, graphite and copper are the materials I am likely to find.


    Bragg's law:

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

    What should I do? Calculate d?

    [tex]
    d = \frac{n \lambda}{2 sin \theta_{hkl}}
    [/tex]

    What is n?

    Here are some data:
    Nickel: http://rruff.geo.arizona.edu/AMS/xtal_data/DIFfiles/10253.txt
    Graphite: http://rruff.geo.arizona.edu/AMS/xtal_data/DIFfiles/11023.txt
    Silicon: http://rruff.geo.arizona.edu/AMS/xtal_data/DIFfiles/10342.txt
    Copper: http://rruff.geo.arizona.edu/AMS/xtal_data/DIFfiles/13267.txt
    Iron: http://rruff.geo.arizona.edu/AMS/xtal_data/DIFfiles/00669.txt
     
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted