Molecular rotational spectroscopy has been used to remove some of the mystery regarding the anomalous properties of water due to its unique bonding mode.
via A new spin on water research: Bonding.
"Structures of Cage, Prism, and Book Isomers of Water Hexamer from Broadband Rotational Spectroscopy", Science, 2012, 336, 897-901; DOI: 10.1126/science.1220574
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