In the analysis of rock and mineral fragments, especially from soils and sediments, it is often necessary to identify small single grains. Normally, mineralogical analysis of single grains is done with the petrographie microscope, but in many instances a much more satisfactory analysis would result if both X-ray and petrographie information were available. The objective of this investigation was to create a general procedure whereby X-ray diffraction data could be obtained on the same grain used for petrography. The techniques described herein were developed for use with Norelco Debye-Scherrer type powder cameras.

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