title: The proper structure of cubic ice confined in mesopores.
abstract: To examine the reason for the formation and the structure of cubic ice in a restricted space, we measured the powder x-ray diffraction patterns of cubic ice formed within the mesopores of porous silicas as a function of pore size (4-70 nm). The results strongly suggest that cubic ice formed in the mesopores does not take a cubic structure as envisaged by Konig. It may be actually composed of very small crystallites of hexagonal ice that contains a large amount of growth faults depending on the crystallite size, that is, ice with disordered stacking sequence. Suppression of crystal growth of ice in the mesopores seems to be a vital factor for the formation and the stability of cubic ice.
authors.affiliation: Department of Chemistry, Okayama University of Science, Ridai-cho I-1, Okayama 700-0005, Japan.
authors.forename: Kunimitsu
authors.initials: K
authors.lastname: Morishige
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Uematsu