X-ray Diffraction (XRD)

  • Davide Levy (Manager)

Equipment/facility: Equipment

    Equipments Details


    The XRD diffraction laboratory in the Wolfson Applied Material Research Center is characterized by versality of instrumentation. The Bruker D8 Discover diffractometer is equipped with the linear energy discriminate detector LINXEYE XE. The larger diffraction circle gives a better angular resolution, the intensity losing, due the longer beam path, is compensate by the energy discriminate detector.

    This device minimizes the fluorescence and Kb radiation, without losing intensity, so other monochromatizating devices are not relevant.

    Two other important features:

    fast optic changer, so it is possible pass from standard divergent beam to parallel beam, using the Göbels mirror. This setup is used to study surfaces as well for transmission diffraction (membrane and capillary). Moreover, by using parallel beam, it is possible to collect excellent data on irregular samples, as rocks or manufacts, as well to analyze small portions (0.3 to 1 mm) of the sample.
    Versatility of Eulerian Cradle at the center of the goniometer: together with the standard plastic and zero background sample holders, the wide space between the diffractometer arms allows to study relatively big rocks or manufacts.
    There is a wide spectrum of crystalline materials that can been analyzed in this laboratory: from organic/bioorganic molecules to inorganic and mineralogical samples.

    Several analyses can be executed:

    Qualitative and quantitative analysis are accomplished to reveal the phases present in the samples and determine their weight fractions.
    Determine the grain size, the cell parameters and the crystal structure.
    The XRD parallel beam set-up can be used to study the surface properties of crystalline deposition on crystalline substrate.


    Longer Goniometer diameter (430 mm)
    Higher resolution
    Goniometer scan: θ/θ and 2θ
    Higher versability (transmission/reflection diffraction)
    Detector: LYNXEYE XE linear detector
    Fast and sensible detector
    Monochromatizating: energy discriminate detector
    Fluorescence and spurious radiation (Kb and KW)
    Radiation: Copper or Chromium
    Different optics set up:
    Divergent beam
    Parallel beam
    Circular parallel beam
    Divergent beam: Bragg-Brentano set-up
    Standard set-up
    Low background/high intensity
    Max resolution
    Parallel beam setup
    Grazing incidence
    Rough surface diffraction
    Transmission mode capillary/membrane
    Micro beam (oval shape, 0.3-1mm)
    Circular parallel beam
    Micro beam (circular)
    Sample holder
    x– y– z-centering (Eulerian cradle)
    Zero background sample holder
    High quantity sample holder
    Airtight sample holder
    Wafer chuck
    Membrane transition holder
    Rotating Capillary holder

    XRPD application:

    Phase identification
    PDF4+/organics database
    Phase quantity analysis
    Rietveld method
    Amorphous phase quantification (Standard method)
    Structural resolution and analysis
    Cell parameter determination
    Structure resolution
    Structure parameter refinement
    Profile analysis
    Grain size analysis


    Multidisciplinary Research Building, Room #101.


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