“…Another orthorhombic phase, Several phases in the system UO 2 -MoO 2 -MoO 3 -WO 3 U 5 W 19 O 67 , assumed to be structurally related to U 3 O 8 , has have been prepared and studied by high-resolution elec-also been observed (8). tron microscopy (HREM) combined with X-ray powder and single-crystal diffraction (1)(2)(3). The phases observed EXPERIMENTAL were either oxides containing uranium and molybdenum or uranium, molybdenum, and tungsten.…”