1. Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
2. Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brasil
3. Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
4. Swedish Nuclear Fuel and Waste Management Company (SKB), SE-169 03 Solna, Sweden