Explanatory notes
… n is 2 or more, and a cyclic series of general formula (HPO 3 ) n , where n is 3 or more, can be generated. (1) … the cyclic acids exemplified by cyclo ‑triphosphoric acid (HPO 3 ) 3 and cyclo ‑tetraphosphoric acid (HPO 3 ) 4 , which occur as minor components of mixed …