The kryptonium ion, KrH+, is a hypothetical onium ion, consisting of protonated krypton. Although salts of the fluorokryptonium ion, KrF+, are known to exist, the existence of the kryptonium cation itself has not been proven.[1]

References

  1. ^ Lehmann, J (2002). "The chemistry of krypton". Coordination Chemistry Reviews. 233–234: 1. doi:10.1016/S0010-8545(02)00202-3.