[1] Tech Univ Kaiserslautern, Inst Inorgan Chem, Erwin Schrodinger Str 54, D-67663 Kaiserslautern, Germany
[2] Tech Univ Kaiserslautern, Inst Phys & Theoret Chem, Erwin Schrodinger Str 52, D-67663 Kaiserslautern, Germany
[3] Tech Univ Kaiserslautern, Reseach Ctr Optimas, Erwin Schrodinger Str 52, D-67663 Kaiserslautern, Germany
[4] Univ La Frontera, Nucleo Milenio Multimat, Francisco Salazar 01145, Chile
[5] Univ La Frontera, Dept Ciencias Fis, Francisco Salazar 01145, Chile