Editing Ice XI
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'''Ice XI''' is the proton-ordered form of [[Ice Ih]] and was identified in 1972 by Shuji Kawada (Ref. 1 | '''Ice XI''' is the proton-ordered form of [[Ice Ih]] and was identified in 1972 by Shuji Kawada and others (Ref. 1-3). In principle | ||
ice XI forms when ice Ih is cooled to below 72K. It has an orthorhombic structure with the space group Cmc2<sub>1</sub> with | |||
eight molecules per unit cell (Ref. 4) | |||
Its lattice parameters are a=4.465(3) Å, b=7.859(4) Å, and c=7.292(2) Å at 5 K (Ref. 4). | |||
==References== | ==References== | ||
#[http://dx.doi.org/10.1143/JPSJ.32.1442 Shuji Kawada "Dielectric Dispersion and Phase Transition of KOH Doped Ice", Journal of the Physical Society of Japan '''32''' pp. 1442-1442 (1972)] | #[http://dx.doi.org/10.1143/JPSJ.32.1442 Shuji Kawada "Dielectric Dispersion and Phase Transition of KOH Doped Ice", Journal of the Physical Society of Japan '''32''' pp. 1442-1442 (1972)] | ||
#[http://dx.doi.org/10.1016/0022-3697(84)90008-8 Yoshimitsu Tajima, Takasuke Matsuo and Hiroshi Suga "Calorimetric study of phase transition in hexagonal ice doped with alkali hydroxides", Journal of Physics and Chemistry of Solids '''45''' pp. 1135-1144 (1984)] | #[http://dx.doi.org/10.1016/0022-3697(84)90008-8 Yoshimitsu Tajima, Takasuke Matsuo and Hiroshi Suga "Calorimetric study of phase transition in hexagonal ice doped with alkali hydroxides", Journal of Physics and Chemistry of Solids '''45''' pp. 1135-1144 (1984)] | ||
#[http://dx.doi.org/10.1016/0022-3697(86)90126-5 Takasuke Matsuo, Yoshimitsu Tajima and Hiroshi Suga "Calorimetric study of a phase transition in D2O ice Ih doped with KOD: Ice XI", Journal of Physics and Chemistry of Solids '''47''' pp. 165-173 (1986)] | #[http://dx.doi.org/10.1016/0022-3697(86)90126-5 Takasuke Matsuo, Yoshimitsu Tajima and Hiroshi Suga "Calorimetric study of a phase transition in D2O ice Ih doped with KOD: Ice XI", Journal of Physics and Chemistry of Solids '''47''' pp. 165-173 (1986)] | ||
#[http://dx.doi.org/10.1063/1.471745 Christina M. B. Line and R. W. Whitworth "A high resolution neutron powder diffraction study of D2O ice XI", Journal of Chemical Physics '''104''' pp. 10008-10013 (1996)] | #[http://dx.doi.org/10.1063/1.471745 Christina M. B. Line and R. W. Whitworth "A high resolution neutron powder diffraction study of D2O ice XI", Journal of Chemical Physics '''104''' pp. 10008-10013 (1996)] |