Lab2 - University of Arizona Materials Science and...

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University of Arizona Materials Science and Engineering MSE 110: Solid State Chemistry X-Ray Diffraction Patterns Date Performed: 2/12/08 Date Submitted: 3/6/08 Paul Sanders
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X-Ray Diffraction Patterns Introduction: The purpose of this experiment was to identify an unknown compound using x-ray diffraction. When an x-ray beam is directed at certain compounds, it bounces off the atoms inside the compounds. By studying the beams that have been bounced back towards the machine, we can determine where they overlap one another, creating constructive interference, and where they do not. Where the waves overlap, there are large spikes in the graph, because they have interfered constructively with one another, and so we can determine at what theta values the spikes are at. Once we have determined these theta values, we can use Bragg’s equation, or = λ 2dsinθ to find the d-spacing, or how far apart the planes of molecules are.
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Experimental Procedure In this experiment, we recorded the spikes of a graph of two unknown
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This note was uploaded on 04/02/2008 for the course MSE 110 taught by Professor Lucas during the Spring '08 term at University of Arizona- Tucson.

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Lab2 - University of Arizona Materials Science and...

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