Small clusters of four water molecules may come together to form water bicyclo-octamers.
The molecular arrangement (A) is high-density, low volume, and has higher entropy whereas molecular arrangement (B) with additional hydrogen bonds (shown green), with 60° relative twist, is low-density, high volume, and has lower entropy.
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This page was established in 2002 and last updated by Martin Chaplin on 1 November, 2021