kryptonium ion
{{distinguish|kryptonium}}
{{Chembox
|Section1={{Chembox Identifiers
| CASNo = 37276-90-7
| CASNo_Ref = {{Cascite|changed|NIST}}
| StdInChI=1S/HKr/h1H/q+1
| StdInChIKey=YDDYRYFCLMHJOO-UHFFFAOYSA-N
| SMILES = [KrH+]
}}
|Section2={{Chembox Properties
}}
|Section8={{Chembox Related
| OtherCompounds=argonium; helium hydride ion; Neonium
}}
}}
The kryptonium ion, KrH+, is an onium ion, consisting of protonated krypton. Kryptonium is known in dilute gas phase.{{cite journal |last1=Linnartz |first1=H. |last2=Zink |first2=L.R. |last3=Evenson |first3=K.M. |title=The Pure Rotational Spectra of 84KrH+ and 86KrH+ |journal=Journal of Molecular Spectroscopy |date=July 1997 |volume=184 |issue=1 |pages=56–59 |doi=10.1006/jmsp.1997.7297 |bibcode=1997JMoSp.184...56L |url=https://tf.nist.gov/general/pdf/1196.pdf}} Although salts of the fluorokryptonium ion, KrF+, are known to exist, the existence of the kryptonium salts have not been proven.{{cite journal|doi = 10.1016/S0010-8545(02)00202-3|title = The chemistry of krypton|year = 2002|last1 = Lehmann|first1 = J|journal = Coordination Chemistry Reviews|volume = 233-234|pages = 1–39}}