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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 Carbon dioxide clathrate ： ウィキペディア英語版 Carbon dioxide clathrate Carbon dioxide hydrate is a Type I gas clathrate (Sloan 1998). However, there has been some experimental evidence for the development of a metastable Type II phase at temperature near the ice melting point (Fleyfel and Devlin 1990, Staykova ''et al.'' 2003). The clathrate is a snow like substance that can exist below 283K (10 °C) at a range of pressures of carbon dioxide. It is quite likely to be important on Mars due to the presence of carbon dioxide and ice at low temperatures. == Some history == The first evidence for the existence of CO2 hydrates dates back to the year 1882, when Wróblewski (1882a, b and c) reported clathrate formation while studying carbonic acid. He noted that gas hydrate was a white material resembling snow, and could be formed by raising the pressure above a certain limit in his H2O - CO2 system. He was the first to estimate the CO2 hydrate composition, finding it to be approximately CO2·8H2O. He also mentions that "...the hydrate is only formed either on the walls of the tube, where the water layer is extremely thin or on the free water surface... ''(from French)''" This already indicates the importance of the surface available for reaction (i.e. the larger the surface the better). Later on, in 1894, Villard deduced the hydrate composition as CO2·6H2O. Three years later, he published the hydrate dissociation curve in the range 267 K to 283 K (Villard 1897). Tamman & Krige (1925) measured the hydrate decomposition curve from 253 K down to 230 K and Frost & Deaton (1946) determined the dissociation pressure between 273 and 283 K. Takenouchi & Kennedy (1965) measured the decomposition curve from 45 bars up to 2 kbar (4.5 to 200 MPa). The CO2 hydrate was classified as a Type I clathrate for the first time by von Stackelberg & Muller (1954). 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「Carbon dioxide clathrate」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.