1. Institute of Physical and Theoretical
Chemistry, University of Regensburg, Universitätsstrasse
31, D-93040 Regensburg, Germany;
2. Physical Chemistry, University of Konstanz, Universitätsstraße
10, 78457 Konstanz, Germany;
3. Technical Faculty, Christian-Albrechts-University Kiel, Kaiserstrasse
2, D-24143 Kiel, Germany;
4. Laboratorio de Estudios Crystalográficos, IACT (CSIC-UGR), Av. de las Palmeras 4, E-18100 Armilla,
Spain