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Experimental investigations concerning the synthesis of Si 1−x Ge x O 2  solid solutions with quartz structure have been carried out under solvothermal conditions from sol-gel preparations. The cell parameters of the powders have been determined by X-ray powder diffraction. The amount of germanium inside the SiO 2  structure was measured also by electron probe micro-analysis (EPMA).

Solvothermal Synthesis of α-Quartz Powder Doped with Germanium