1. Physical and Computational Science Directorate Pacific Northwest National Laboratory Richland WA 99352 USA
2. Chemistry Department, Faculty of Science Alexandria University P. O. Box 426 Ibrahimia Alexandria 21321 Egypt
3. Laboratory of Molecular Simulation Institut des Sciences et Ingeénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) Rue de l'Industrie 17 1951 Sion Valais Switzerland
4. X-ray Science Division Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA
5. IMDEA Materials Institute c/Eric Kandel 2 28906 Getafe, Madrid Spain