Hello everyone. I should get powder diffraction of ag nanoparticle. i choose ag crystal structure and make supercell 10*10*10 and get powder diffraction.i make ag nanoparticle in sphere shape  from nanostructure builder but i can not get powder diffraction.what should i do to get xrd powder diffraction from ag nanoparticle ?

(cant build crystal for ag nanoparticle)