Waxaa sidoo kale lagu soo warramey in 2009 in iridium (((VIII) oxide (IrO4) waxaa lagu diyaariyey xaaladaha go'doominta matrix (6 K in Ar) by UV irradiation of a iridium-peroxo complex. Noocan, si kastaba ha ahaatee, lama filayo in ay xasilloon tahay sida adag bulk at heerkulka sare. xaaladda ugu sarreeya oxidation (+9), kaas oo sidoo kale waa ugu sarreeya diiwaan kasta oo element, waxaa la og yahay oo kaliya in mid ka mid ah cO4, Iridium waxaa loo yaqaanaa oo kaliya sida noocyada gaaska-aseed oo aan la aqoon in ay sameeyaan wax kasta oo salta +6 oxidation sare, laakiin waxaa ka mid ah Irridium oo kaliya ayaa la rumeysan yahay in ay ka kooban yihiin Irridium oo keliya oo ka kooban 18 +4-Hydroxide MgF6 iyo laba oxides isku dhafan Sr2MgIrO6 iyo Sr2CaIrO6. Waxaa intaa dheer, waxaa la sheegay in iridium oo kaliya ayaa la og yahay in ay ka soo diyaariyey xaaladaha oxidation
IrH4−5 iyo 18-electron IrH5−4 anion