To answer this question, we need to know what compound the chlorine ion (Cl-) is a part of.

Here's why:

* Ionic Compounds: In ionic compounds, the ions are arranged in a crystal lattice. The types of ions surrounding a particular ion depend on the overall structure of the compound.

* Example: In sodium chloride (NaCl), each chloride ion (Cl-) is surrounded by six sodium ions (Na+).

To give you a specific answer, please tell me which compound the chlorine ion is in.

Once you provide the compound, I can tell you the ions that surround the chlorine ion in its crystal lattice.