Using CuCl vapor to ion exchange copper into zeolite Na-Y. Single crystal structure of |Cu30Na30Cl9|[Si121Al71O384]-FAU containing Cu16Cl721+, Cu4Cl7+, Cu3Cl2+, and Cu2+

- CuCl vapor can be used to exchange copper ions into zeolites in their Na+ forms.
- The crystal structure of a partly copper exchanged zeolite Y is presented.
- Cu+, Cu2+, Na+, and Cl− are found in the product crystal.
- Most Cun+ ions are just 3-coordinate and accessible through the main channels.
- The complex cations Cu16Cl721+, Cu4Cl7+, and Cu3Cl2+ center some cavities and rings.