Fig. 5From: Controlled Hydrothermal Synthesis and Photoluminescence of Nanocrystalline ZnGa2O4:Cr3+ MonospheresXRD patterns of the 0.2ZGC products obtained by 24 h of hydrothermal reaction at 180 °C. The Cit3−/M molar ratio R is 1.0 in each case, and the pH values are a 5, b 7, and c 9Back to article page