A solid solution of vanadium (V)-doped tin oxide (SnO2) particles of average diameter 2 nm and V content of 19 at.% was prepared at normal pressure and low temperature (100 degrees C) by mixing Wet SnO2 gel SnO2 center dot-xH(2)O with a boiling solution of vanadium oxide (V2O5). Experimental characterizations using X-ray, electron diffraction, and transmission electron microscope show evidence of a pure single phase. The nanoparticles exhibit a mixed magnetic behavior, namely paramagnetic and ferromagnetic. Their thermal stability is also investigated. At higher temperature, 850 degrees C, some amount of Fe precipitates from the solid solution.