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Research Technical Services

X-Ray Powder Diffraction

XRPD

The X-ray Powder Technique is mainly used for the determination of the chemical composition of a polycrystalline sample. That is, it tells us which crystalline phases are present in the sample. It also gives us quantitative information, that is, in what relative quantity these phases are present. The technique also serves to identify polymorphism and to determine whether a sample is amorphous or crystalline and what is its degree of crystallinity.

Job request

In order to request the analysis of a sample by X-ray powder diffraction, you should contact the staff responsible for the equipment.

You will need to give the toxicity and any storage precautions. Once the report has been delivered, if you do not collect the sample within one week, any remaining sample will be destroyed.

The equipment

X-Ray Powder Diffractometer:

Brand :
Bruker AXS


Model :
D8 Advance
Technical specifications:
  • Copper X-ray tube.
  • The X-Ray Generator can work from 20 to 60KV and from 5 to 80 mA
  • Scintillation Detector {NaI(Tl)}
  • Equipped with secondary monochromator in order to suppress background fluorescence radiation and Kβ radiation
  • Goniometer with Bragg-Brentano Geometry, Theta-2Theta, reflection mode.
  • Automatic sample changer with nine positions

How does it work?

  • The technique allows the identification of present crystalline phases in solid samples. The identification is carried out by comparing the diffractogram of the sample to be identified with the patterns stored in a powder diffraction database (JCPDS-PDF 2)
  • Semi-quantitative and quantitative analyses of crystalline phases
  • Determination of the crystalline domain size
  • Degree of crystallinity
  • Determination and refinement of crystalline cell parameters

Applications / Practical cases

  • Chemical, Pharmaceutical and Biotechnology Industry. Identification of Substances.Polymorphism Studies.
  • Construction Industry. Detection of asbestos. Analyses of aggregates and materials for construction.
  • Quality Assurance of Materials. Metallic pieces.
  • Archeology and Restoration.
  • The ceramics industry.
  • Nanotechnology and new materials.
  • Soil analysis.

More information:

Organisations that have financed the acquisition of the equipment:

European Union. European regional development fund.
Government of Catalonia

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