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[[Image:CdSeDiffractogram.JPG|thumb|left|Diffractogram of CdSe]] The figure to the left is a diffractogram of a sample of CdSe Quantum Dots given by an XRD test along with an overlay of the diffraction pattern of CdSe provided by the [http://en.wikipedia.org/wiki/International_Centre_for_Diffraction_Data International Center for Diffraction Data] (ICDD). The ICDDcollects and maintains Powder Diffraction Files (PDFs) on most known elements and compounds, as the location and magnitude characteristic peaks found in XRD are unique to a particular material, identifying unknown materials and compounds is easy with an accurate enough diffractogram.
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