Ok your data were collected from 10 to 80 degree with step size 0.02 degree. There are around 10 peaks with the strongest occurred on 27.0600 degree. I think you have already had the preliminary data about the content of your soil, ie kaolin, silica ....... or combination of both. Then find or download the PCPDF WIN software. You can find whole XRD data for all material in this software. Try one, for example silica. Do search match method to identify the peaks of your soil. This means to match of your data and standard data from PCPDF. Find at least three strongest peaks that match to your data. If they are match you can justify that your soil is that. Then do the same method to the remain peaks. If you want to find like the crystal structure, parameter cell, etc you can do Rietveld analysis.
Dear Mr. Hussein,
it is a bit too simple to use bulk samples for soil types and pass them through the XRD. I recommend taking samples one of each horizon identified in the field and make a grain size classification and separation. The mineralogical part as far as the inorganic components are concerned encompasses detrital light and heavy minerals which are diagnostic for the intensity of weathering and the homogeneity of the soil profile. The phyllosilicates are advised to be determined by XRD after having separated in a settling tube. Furthermore leaching procedures may help to classify and determine the Fe-, Si-, Al- and P compounds which often escape due to their poor crystallinity any precise determination. This is a rather rough scheme for a mineralogical investigation of the inorganic part of soil types.
Best regards
Harald G. Dill
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