1. Consiglio Nazionale delle RicercheIstituto di Chimica dei Materiali (ICMAT), V. Salaria Km. 29,5CP 10, 00016 Monterotondo Scalo, Italy
2. Department of Physical and Theoretical Chemistry, Vrije Universiteit Amsterdam De Boelelaan 1083, NL-1081 HV Amsterdam, The Netherlands
3. CTG-Italcementi Group, Via Camozzi 124−24121 Bergamo, Italy