The structure parameters of BaNd2Ti3O10 were refined based on Olsen's model. This material has a monoclinic unit cell with space group P2(1)/m. The unit cell parameters are: a = 7.73030(14) Angstrom, b = 7.62578(14) Angstrom, c = 14.23174(31) Angstrom, beta = 97.832(6)degrees. The structure can be considered as a layered perovskite-like structure, in which the perovskite block shows distortion. The various layers link in the order of (Ba1/2O)-(Ba1/2TiO3)-(NdTiO3)-(NdTiO3). (C) 2002 Elsevier Science Ltd. All rights reserved.