In this study we used solid-state synthesis to determine the phase relations in the pyrochlore-rich part of the Bi2O3-TiO2-Nd2O3 system at 1100 degrees C. The samples were analyzed using X-ray powder diffraction and scanning electron microscopy with energy- and wavelength-dispersive spectroscopy. A single-phase pyrochlore ceramic was obtained with the addition of 4.5 mol% of Nd2O3. We determined the solubility limits for the three solid solutions: (i) the pyrochlore solid solution Bi(1.6-1.08x)Ndx Ti2O(6.4+0.3x), where 0.25