Chlorine and iodine are both elements, and elements exist in their pure form. Therefore, they don't form a compound with each other and don't have an empirical formula.

If you're thinking about a compound containing chlorine and iodine, please specify the compound you're interested in. For example:

* Iodine monochloride (ICl): The empirical formula is ICl.

* Iodine trichloride (ICl3): The empirical formula is ICl3.