The introduction of niobium into the FDU-1 structure has been studied. The evolution of the NbFDU-1 pore structure was deliberated using nitrogen adsorption at 77 K and X-ray diffraction. The influence of the niobium source on the structural properties and the incorporation of niobium species into the walls of FDU-1 molecular sieve were evaluated with the aforementioned techniques and thermogyravimetry. The prepared materials retained a 3D cubic Fm3m structure typical of FDU-1 materials.