A coded post on Passerini's blog appears to say fluorine is better than chlorine when doing CF with electrolytic cells.
http://22passi.blogspot.ca/2013/04/a-tutti-i-ricercatori-lenrfusione.html <<This is an important message for ALL researchers working in the field of LENR/Cold Fusion It is a well-known fact in Italy that Comunione e Liberazione (CL) and the Partito Democratico (PD) yield disappointing results when they are together (the so-called "Catho-Communists")... if you want to document the excess heat from your LENR experiments successfully, be sure to use the PDF format. I'll say it again: PDFFFF!!! Tell your colleagues. Take, for instance, the System and Method for Generating Particles patent held by the US Navy: if its authors had only known the above, they would have held a Royal Flush in their hand. Instead, all they have is a simple straight of middling value.>> It has been suggested elsewhere that PDFFFF means PdF4. Harry