A silicogermanate with 20-ring channels directed by a simple quaternary ammonium cation

A silicogermanate, PKU-12, with the -CLO type of zeolite framework was hydrothermally synthesized under fluoride media using diisopropylethylmethylammonium as a structure directing agent. The formation of the silicogermanate zeolite with 20-ring channels has not only extended the -CLO family from phosphates into silicogermanates, but also demonstrated its structural diversity.