Iodine-containing compounds are ubiquitous in the atmosphere, but are found in large concentrations in marine, coastal, and polar environments. Studies have shown that high concentrations of iodine-containing compounds leads to NPF in Arctic and marine environments. Previous computational studies have been carried out on iodine driven cluster formation leading to NPF. The focus has primarily been on iodic acid (HIO 3 ) and iodous acid (HIO 2 ). Both on their own, but also together with other common nucleation precursors such as sulfuric acid, 20 methanesulfonic acid, ammonia and dimethylamine. Especially iodic acid assisted by various bases has been shown to be a potent source of new particles.