hexametaphosphate

Metaphosphate (P6O186-)

Cyclohexaphosphoric acid

2,4,6,8,10,12-hexaoxido-1,3,5,7,9,11-hexaoxa-2$l^{5},4$l^{5},6$l^{5},8 $l^{5},10$l^{5},12$l^{5}-hexaphosphacyclododecane 2,4,6,8,10,12-hexaox ide