In the figure, peaks are matching to the parent compound and the excess peaks are matching for Doping compound.
Doping x= 0.2 in parent compound.
The physical meaning of doping is exchang the doping atoms with that of the host for atoms having size omparable to the host ones and inbetween for small doping elements. For both cases there should be no special X-ray diffraction since X-ray diffraction needs a crystal plain. In the diffraction diagram the peaks refer to a second phase material made by the extra element or a second crystal structure
The physical meaning of doping is exchang the doping atoms with that of the host for atoms having size omparable to the host ones and inbetween for small doping elements. For both cases there should be no special X-ray diffraction since X-ray diffraction needs a crystal plain. In the diffraction diagram the peaks refer to a second phase material made by the extra element or a second crystal structure
It would be interesting to compare XRD patterns with different amounts of doping additive (0.03, 0.05, 0.1 etc.). Then we would be able to come to a conclusion.
I have a general remark reffering to the term of doping. If you add 20% of your so called "doping compound" to the parent compound. This is not called doping anymore, but rather alloying. Doping concentrations are typing orders of magnitude below 0.01% -> e.g. semiconductor science, gem stones like saphire or ruby etc.
Now back to your question. If you see peaks of your parent compound as well as of your "doping compound", this means that your "doping compound" precipitated in your parent compound in rather large coherently scattering volumes. This means your newly designed material shows biphasic behavior.
Best regards
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