@Zephir_AWT that is very interesting. Certainly during the transmutation similar compounds such as ammonium can be easily produced.
Note, that the sample was handled in high purity Argon while the process of sample preparation does not involve washing…
as promised I am sharing at least some data from the sample from which I have posted SEM photos.
At the moment I can share just EDX from the single area - from area of the photo T3/T4.
This is good example of how reaction is happening relatively…