(NH4)2[UO2Cl4]·2H2O, a new uranyl tetra­chloride with ammonium charge-balancing cations

While several actinyl tetra­halides have been synthesized and their structures reported, (NH4)2(UO2Cl4)·2H2O represents a new uranyl tetra­chloride salt synthesized in a slow evaporation from a 2 M hydro­chloric acid solution. Its optical properties were measured by diffuse reflectance and luminescence spectroscopies, while powder X-ray diffraction confirmed an ammonium chloride impurity phase.