Phase transitions sequence in pyrochlore Cd2 Nb2O7 studied by IR reflectivityE. Buixaderas, S. Kamba, J. Petzelt, M. Savinov and N. N. KolpakovaEur. Phys. J. B, 19 1 (2001) 9-16DOI: https://doi.org/10.1007/s100510170344