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Flat plate sample holders may be made of a variety of materials such as
plastics or metals. Plastic ones are cheap, but are usually
less flat than the equivalent metal ones. This can lead to problems when exact
reproducibility is required in highly accurate work.
The square-shaped sample holder is designed for an automatic sample changer that some manufacturers offer with the diffractometer, but otherwise differs little in function from the round one. |
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The sample (seen here as a yellow powder) is filled into the centre and then squashed flat using, for example, a glass microscope slide. The rings help to prevent movement of the sample sideways when it is flattened off. |
