The peaks at scattering angles (2θ) of 38.61, 44.82, and 64.89 correspond to the reflection from 101,102, and 103 crystal planes, respectively.
The (003) peak centered at 2θ = 18.73° and (104) peak centered at 2θ = 44.52° correspond to the reflection of R3m layered rock salt structure and the mixed reflections of R3m layered rock salt structure and Fm3m cubic rock salt structure, respectively [23 25].
Such periodic systems have a Fourier transform that is concentrated at periodically repeating points in reciprocal space known as Bragg peaks; the Bragg peaks correspond to the reflection spots observed in the diffraction image.
The regions incorporating −π < X < −π/2, π/2 < X < π relate to scattering from the underside of the planes and correspond to the reflection.
The rings correspond to the reflections from (111), (220) and (311) planes confirming the cubic crystallographic structure of the ZnS nanoparticles.
Effectively, all the peaks correspond to the reflections from (111), (222), (400), and (331) planes of the cubic phase of As2O3 [53].
According to the 4 0783 JCPDS card, the peaks located at 2θ = 38.17°, 44.33°, and 64.53° correspond to the reflections of the silver crystalline planes (111), (200), and (220), respectively.
After the 5-min annealing treatment at 150 °C, the nanofibers are able to crystallize, and the main characteristic peaks are observed at 14.04°, 28.42°, 31.76°, 40.46°, and 43.02°, which correspond to the reflections from the (110), (220), (310), (224), and (314) crystal planes of the tetragonal perovskite structure.
These diffraction peaks were corresponded to the reflection planes (111), (220), (311), (400), (511), and (440), respectively.
The problem treated herein corresponds to the reflection and transmission of waves obliquely incident at an interface between fluid-saturated porous media and one-phase elastic fluid media.
