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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ice XVI ： ウィキペディア英語版 Ice XVI Ice XVI is the least dense (0.81 g/cm)〔 experimentally obtained crystalline form of ice. It is topologically equivalent to the empty structure of sII clathrate hydrates. It has been first obtained in 2014 by removing gas molecules from a Ne clathrate under vacuum at temperatures below 147 K. The resulting empty water frame, ice XVI, is thermodynamically unstable at the experimental conditions, yet it can be preserved at cryogenic temperatures. Above 145–147 K at positive pressures ice XVI transforms into the stacking-faulty Ice Ic and further into ordinary Ice Ih . Theoretical studies predict Ice XVI to be thermodynamically stable at negative pressures (that is under tension). ==See also== *Ice for other crystalline form of ice 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ice XVI」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.