User:Douglas M. Fox/Notebook/AU CHEM-581 F2012 Lab Support/2012/09/17

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Instrumentation Maintenance

  1. Cleaned XRD cooling screen
    • Ran cooling water for 10 min prior to draining and disconnecting
    • Cleaned screen with metal brush
    • Cleaned back of x-ray tube (black smudges & corrosion on copper backing) with testtube brush
    • Filled chiller with freshly purchased distilled water
    • Some algae present; drained half, removed piece, & replaced water through cheesecloth
  2. XRD Conformation with Si
    • Aligned x-ray beam with no sample holder or monochrometer attached
    • Used Si sample with sample changer & monochrometer attached
    • Ran full 2θ range

   (hkl)  2θ (exp)  2θ (theor)
  (111)   28.457    28.370
  (220)   47.284    47.252
  (311)   56.097    56.076
  (400)   69.100    69.089
  (331)   76.343    76.338
  (422)   87.991    87.996
  (511)   94.914    94.922
  (440)  106.669   106.684
  (531)  114.046   114.071
  (620)  127.495   127.533
  (533)  136.846   136.891


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