clusters get tricky , so ... 28 molecules = 84 atoms ? always even numbers ?
theoretically water molecule has 3 atoms but thats ONLY based on gas collected in vesels 150 years ago !
I believe certain things exist and most certainly - in , things we can not see .
these clusters would have to be connected , what ? helical , sperical , and at the same time water is self ionizing
these clusters are in unpolarised samples ?