Neutron diffraction measurements have been carried out at 25 degrees C for 9.6 mol%*LiPF6-deutrerated dimethyl carbonate (DMC-d(6)) solutions in which the isotopic ratio of Li-6/Li-7 was changed. Local structure of Li+ in the solution was derived from the least squares fitting analysis of observed difference function, Delta(Li)(Q). It was revealed that Li+ is surrounded by ca. 3 DMC molecules and ca. 1 PF6- with intermolecular distances of r(Li+center dot center dot center dot O(DMC)) = 2.08 +/- 0.02 angstrom and r(Li+center dot center dot center dot F(PF6-)) = 2.03 +/- 0.06 angstrom, respectively. Raman experimental study and DFT calculations agree well with neutron structure analysis. (C) 2015 Elsevier B.V. All rights reserved.