The influence of Cr 2 O 3 on glass forming characteristics and physical properties of PbO–Fe 2 O 3 –P 2 O 5 glasses has been investigated by Raman and Mössbauer spectroscopies, X-ray diffraction analysis (XRD), Differential Thermal Analysis (DTA), Scanning Electron Microscopy (SEM) and impedance spectroscopy. Glasses of the general composition xCr 2 O 3 –(28.3-x)PbO–28.7Fe 2 O 3 –43.0P 2 O 5 , 0≤×≤10, (mol%) were prepared by conventional melt-quenching technique. The compositions containing up to 4mol% Cr 2 O 3 formed fully amorphous samples and their Raman spectra show systematic increase in the fraction of orthophosphate Q 0 units with increasing Cr 2 O 3 content and O/P ratio.On the other hand, compositions containing 8 and 10mol% Cr 2 O 3 partially crystallized during cooling and annealing to Fe 7 (PO 4 ) 6 , Fe 2 Pb 3 (PO 4 ) 4 and Cr 2 Pb 3 (PO 4 ) 4 . A high tendency for crystallization of these melts is related to the high O/P (>4) and Fe 2+ /Fe tot (≈0.60) ratios.Electrical conductivity of xCr 2 O 3 –(28.3-x)PbO–28.7Fe 2 O 3 –43.0P 2 O 5 , 0≤×≤10, (mol%) compositions is independent of Cr 2 O 3 and controlled entirely by the polaron transfer between Fe 2+ and Fe 3+ ions.