A new family of crystalline aluminosilicate zeolites has been synthesized. These zeolites are represented by the empirical formula. M.sub.m.sup.n+R.sub.r.sup.+Al.sub.(1-x)E.sub.xSi.sub.yO.sub.z where M is an alkali, alkaline earth, or rare earth metal such as lithium and strontium, R is a singly charged organoammonium cation such as the choline cation and E is a framework element such as gallium. These zeolites are similar to ZSM-18 but are characterized by unique x-ray diffraction patterns and compositions and have catalytic properties for carrying out various hydrocarbon conversion processes.