Phase transitions sequence in pyrochlore Cd2 Nb2O7 studied by IR reflectivity E. Buixaderas, S. Kamba, J. Petzelt, M. Savinov and N. N. Kolpakova Eur. Phys. J. B, 19 1 (2001) 9-16 Published online: 15 January 2001 DOI: 10.1007/s100510170344