Abstract
The structural state of SiO2 nanoparticles synthesized by plasma-chemical and liquid-phase methods is studied by X-ray diffraction analysis and simulation modeling. The amorphous state of the SiO2 phase unit cell is simulated in the framework of molecular dynamics. It is shown from the first principles that the obtained SiO2 cell is stable. It is found that nanoparticles are in an amorphous state. As a result of the refinement of the SiO2 model phase parameters by the Rietveld method, complete structural information is established and the parameters of primitive cells, spatial distribution of atoms, and occupancy of the cell nodes are determined.
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