1. Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
2. Department of Chemistry, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-900, Brazil
3. Department of Physics, Umeå University, Umeå, SE-90187, Sweden
4. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA