Hydrothermally Controlled Growth of MnPO4·H2O Single-Crystal Rods

Abstract Rod-like MnPO4·H2O single crystallites were hydrothermally prepared by the reaction of Mn(NO3)2 with H3PO4 at 130 °C for 16 h. The products were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), infrared spectrum (IR), and their magnetic properties were evaluated on a vibrating sample magnetometer (VSM). The synthesized single-crystal rods have diameters of 0.1–0.66 μm and lengths of up to several micrometers. The influences of different phosphates, the volume ratio between reaction materials, reaction temperature, and reaction time on the morphology and phase of the final products under hydrothermal conditions are discussed. A possible formation mechanism has been proposed on the growth of MnPO4·H2O single-crystal rods.