/ XRD

X-ray Diffraction (XRD)

X-ray diffraction is a well-known technique that can provide a lot of useful information. It can be used to determine the phases present in a solid and thus help obtain its molecular and elemental composition. For example, it can used to used to quickly identify the compounds present in a mineral or inorganic industrial product.

During the analysis, samples are bombarded with x-rays that are diffracted by the crystalline planes at different angles. This signal is then collected and plotted in a graph showing the signal intensity according to the angle. In crystalline samples, specific peaks will be present and can then be used to identify the phase(s) present.

Parameters

Type of samples: Crystalline solids (inorganics or some organics)
Type of information: Elemental or molecular
Precision: Qualitative (semi-quantitative in some cases)
Detection limit: 5%
Depth of analysis: several microns
Smallest measurable area: 250 microns in diameters

Uses

-Identification of phases present in a sample

-Crystallographic analysis

-Determination of the degree of crystallinity of polymers

 

 

 

Avantages:

Phase identification (leading to molecular and elemental information)

Generally fast and well-known

Large databases are available to perform the identification

Désavantages:

Only useful for crystalline materials

Semi-quantitative analyses can be difficult

For complex samples (several phases, the identification can be difficult)

-Quantification des phases dans des minéraux ou des métaux

-Analyse de polymorphes dans l’industrie pharmaceutique

-Identification de l’orientation préférentielle dans des couches minces

-Analyse de la structure de vitamines, protéines ou médicaments

-Identification de phases

-Analyses de semiconducteurs

Manufacturier: Brucker
Modèles:
-D8 Advance
-D8 Discover/GADDS/Combinatoire
-D8 Discover/GADDS/

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