Pole Figure/Texture Experiment - JIAM Diffraction Facility

Pole figures give us a look at the preferred orientation/texture of a sample. This video contains an explanation of pole figure measurements and shows an example of data collection on an X'Pert3 MRD (Malvern Panalytical).
If you would like more information about the Diffraction Facility or have samples that you would like tested, please visit JIAMdiffraction.com

[@mohamedheddar8021]

Thank you very much, the part of the presentation were you showed the construction of the pole figure next to the process of data extraction really helped in understanding the pole figure.

[@mustafarifat2383]

Same here. I never knew this before!

[@JakobS92]

this video is super helpful for understanding pole figures, thanks!

[@pengyuwang2853]

Thanks for your video, it is really clear and helpful !

[@user-bn8dq9vq4j]

very useful video. now i know what pole figures are measuring

[@sattarkhan123]

This video along with others helped me much.

[@IAMMDiffractionFacility]

Thank you for letting me know!

[@sovrappozisione]

great visuals thank you

[@clintluna6884]

Very helpful! thank you

[@kuanhoon5595]

wonderful!

[@IAMMDiffractionFacility]

Many thanks!

[@pengyuwang2853]

Bu t I noticed that the pole figure has strong symmetry character, it seems that one could almost plot complete pole figure with only quarter of it. I wonder what is the least phi angel needed to detect to plot a whole pole figure ?

[@IAMMDiffractionFacility]

While many pole figures would be well estimated by a quarter pole figure (at least many of the ones I have worked with), it certainly isn't always the case. I would recommend collecting full pole figures.

[@sattarkhan123]

Can you upload video on IPF or if it is already uploaded, can you share it link?

[@IAMMDiffractionFacility]

Unfortunately, I do not have a video on IPFs. I can tell you though that if you load the pole figures into the Panalytical texture software, you can calculate the ODF (orientation distribution function), which will also let you calculate IPFs.

[@andyvo314]

Hi, How to determine the angles of source and detector to produce planes?

[@IAMMDiffractionFacility]

I think you are asking how to determine what omega and 2theta positions to use to get a particular diffraction peak for your particular sample so that you can then collect a pole figure by rotating phi and chi (please correct me if I am wrong). Before performing pole figure measurements, I always perform a standard "powder" diffraction experiment (called a gonio scan in Panalytical software). This way, you can determine the 2theta and omega angles needed for whichever peaks you want to use for pole figures and make sure that peaks are not overlapping. This can be a bit tricky if you have a very large amount of preferred orientation since the peak might not be visible with a standard gonio scan at angles of 0 for chi and phi. In this case, if you know what phase your sample is, you can look up the peak position in a reference file, go to that 2theta position, and then perform a chi scan to see if you get a spike of intensity somewhere. If you do, go to that chi angle and perform a gonio scan. You should then be able to see the peak better to get a more precise 2theta location. I hope this helps! If I misunderstood your question, please try asking again.

[@andyvo314]

@@IAMMDiffractionFacility That is all I want to know. Thanks you for your answer. that is awesome!