Figure 2: Powder diffraction patterns of protonated and reassembled δ-MnO2.
From: The critical role of point defects in improving the specific capacitance of δ-MnO2 nanosheets

XRD patterns of (a) protonated MnO2, (b) reassembled MnO2 treated in pH=4 solution for 24 h, (c) reassembled MnO2 treated in pH=2 solution for 24 h. Data collected on APS 11-ID-B.