Figure 4
From: A novel approach to low-temperature synthesis of cubic HfO2 nanostructures and their cytotoxicity

XRD patterns obtained with varied concentrations of Na2S·xH2O (0, 1, 3, and 5 mmol); without washing after reaction completion (using 3 mmol of Na2S·xH2O); reaction in aqueous media (used 3 mmol Na2S·xH2O, and 15 mL water).