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X-Ray Unit

X-Ray Powder Diffraction Laboratory

Panalytical X´pert PRO Theta/2Theta Diffractometer Panalytical X'pert PRO Theta/2Theta Diffractometer

X-Ray Diffraction is a non destructive analytical characterization technique employed to identify crystalline phases present in a material. It also determines structural propierties such as; defect structures, crystal size, prefererred orientation, etc…

Basics of the technique

Powder XRD (X-ray Diffraction) is perhaps the most widely used x-ray diffraction technique for characterizing materials. As the name suggests, the sample is usually in a powdery form, consisting of fine grains of single crystalline material to be studied. Also, XRD techniques is used to characterize thin film samples grown on substrates
The peaks in a x-ray diffraction pattern are directly related to the atomic distances. The Bragg's Law is one of most important laws used for interpreting x-ray diffraction data.
By comparing the experimental difractograms with diffraction patterns recorded in the different databases (CSD, ICSD, CDD, etc...) the identification of crystalline phases in the sample is possible.

Applications

Chemical and solid state physics
Crystallography and Mineralogy
Structural characterization of material
Pharmaceutical and pharmacology
Cement chemistry
Archaeology and Geochemistry

Operation of the laboratory

 Requirements of the samples

The samples requirements are:

• Standard case: the sample will be reduced to powder, optimal size particle between 10 - 20 microns (it is not prerequisite for approaching the analysis)
• If the sample can not be milled (case of a metal or any minerals)it may be analysed if present a slightly flat surface .
• For the analysis of thin films, samples must present the same conditions as the previous case .

Adminsitrative proceeding

The samples must be accompanied by the application generated in @LIMS. The user must fill all blanks of the request in order to obtain the best possible results.