Kryptonium ion
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| Related compounds | argonium; helium hydride ion; Neonium | 
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references | |
The kryptonium ion, KrH+, is an onium ion, consisting of protonated krypton. Kryptonium is known in dilute gas phase. Although salts of the fluorokryptonium ion, KrF+, are known to exist, the existence of the kryptonium salts have not been proven.