Hello, Zainab Chowdhry.

Let's talk about general behaviour of XRDs results. Once you have a known structure, with certain n peaks, the extra peaks that are not from the known structure can be:

Additional compounds present, like reagents, impurities, etc. Of course we don't want to obtain them , but the fact they appear, doesn't mean that we didn't obtain the correct structure we wanted.

A decrease in symmetry. A high symmetric structure, like cubic, has many lattice planes "convoluted", which means that planes like 100, 010 and 001 are in the same "peak". When the symmetry decreases, they split, so 1 peak can split to 3.

Feel free to reply if you need more help with your structure

Sincerely

Ricardo Tadeu

The new peaks could be due to a degradation of the reagent, maybe it adsorbed water, it is a tetrahydrate form so it could have taken other water molecules, so having a different crystal structure. You should verify the reagent stability

Hi Marcella, thank you for your reply. Is there a way, ilke a jcpds file, to identify the peaks.

You can try to identify the new peaks or the new structure by serching in a crystallographic database a possible match with your diffraction peaks