The polymorphism of ice: five unresolved questions Salzmann, Christoph G. ; Radaelli, Paolo G. ; Slater, Ben ; Finney, John L. Abstract Publication: Physical Chemistry Chemical Physics (Incorporating Faraday Transactions) Pub Date: 2011 DOI: 10.1039/C1CP21712G Bibcode: 2011PCCP...1318468S