DoITPoMS

previous | next

Oriented (or textured) samples

These can be considered as intermediate between single crystal and powder samples. In a diffractometer scan the relative intensities of the peaks are intermediate between those of a single crystal and a powder. The change in relative intensities may indicate the orientation of the sample. This can be observed in the following simulation:

Note: This animation requires Adobe Flash Player 8 and later, which can be downloaded here.

In a complementary manner, orientation can be measured by recording how a reflection is spread at constant 2θ. An unoriented powder has rings of constant intensity, while an oriented sample has an arc or sharp spot.

 

Note: This animation requires Adobe Flash Player 8 and later, which can be downloaded here.

It is sometimes helpful to consider oriented samples in reciprocal space. For information about pole figures see aluMATTER.


previous | next