cluster ion

in mass spectrometry
https://doi.org/10.1351/goldbook.C01115
An ion formed by the combination of more ions or atoms or molecules of a chemical species often in association with a second species. For example, $\ce{[(H2O)_{n}H]^{+}}$ is a cluster ion.
Source:
PAC, 1991, 63, 1541. (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1549 [Terms] [Paper]
Citation: 'cluster ion' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.C01115 RIS BibTex EndNote
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