Medium-density amorphous ice
Medium-density amorphous ice
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中密度非晶冰
DOI：
10.1126/science.abq2105
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发表时间：
2023
期刊：
影响因子：
56.9
通讯作者：
C. Salzmann
中科院分区：
文献类型：
--
作者：
A. Rosu;M. B. Davies;A. Amon;Han Wu;A. Sella;A. Michaelides;C. Salzmann
无定形冰控制着一系列宇宙过程，并且是解释液态水异常的潜在关键材料。低密度和高密度无定形冰之间存在巨大的密度差距，中间有液态水，这是我们目前对水的理解的基石。然而，我们表明，在低温下球磨“普通”冰 Ih 会在该密度间隙内产生结构独特的中密度无定形冰（MDA）。这些结果提出了 MDA 是液态水的真正玻璃态或者是严重剪切的结晶态的可能性。值得注意的是，MDA在低温下的压缩导致其再结晶热函急剧增加，这凸显了H2O可以成为一种高能地球物理材料。描述 在玻璃冰周围铣削 水冰具有许多结晶相，以及一些无定形结构。由于冰的广泛重要性，理解复杂的结构图非常重要。罗苏-芬森等人。发现了通过在低温下球磨六角形冰而形成的中等密度无定形冰。独特的密度和结构有助于将其识别为一种新形式的冰，从而对这种重要材料的稳定无定形结构提出了疑问。 —BG 球磨冰形成密度接近液态水的无定形结构。
Amorphous ices govern a range of cosmological processes and are potentially key materials for explaining the anomalies of liquid water. A substantial density gap between low-density and high-density amorphous ice with liquid water in the middle is a cornerstone of our current understanding of water. However, we show that ball milling “ordinary” ice Ih at low temperature gives a structurally distinct medium-density amorphous ice (MDA) within this density gap. These results raise the possibility that MDA is the true glassy state of liquid water or alternatively a heavily sheared crystalline state. Notably, the compression of MDA at low temperature leads to a sharp increase of its recrystallization enthalpy, highlighting that H2O can be a high-energy geophysical material. Description Milling around glassy ice Water ice has many crystalline phases, along with a few amorphous structures. The complex structural diagram is important to understand because of the widespread importance of ice. Rosu-Finsen et al. discovered a medium-density amorphous ice formed by ball milling hexagonal ice at low temperatures. The distinct density and structure helped to identify it as a new form of ice, opening up questions as to the stable amorphous structure of this important material. —BG Ball milling ice creates an amorphous structure with a density close to liquid water.
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影响因子：
64.8
作者：
C. Tulk;J. Molaison;A. Makhluf;C. Manning;D. Klug
通讯作者：
C. Tulk;J. Molaison;A. Makhluf;C. Manning;D. Klug
DOI：
10.1073/pnas.1705303114
发表时间：
2017-08-01
影响因子：
11.1
作者：
Perakis, Fivos;Amann-Winkel, Katrin;Nilsson, Anders
通讯作者：
Nilsson, Anders
影响因子：
56.9
作者：
Debenedetti, Pablo G.;Sciortino, Francesco;Zerze, Gul H.
通讯作者：
Zerze, Gul H.
影响因子：
19.6
作者：
V. Prakapenka;N. Holtgrewe;S. Lobanov;A. Goncharov
通讯作者：
V. Prakapenka;N. Holtgrewe;S. Lobanov;A. Goncharov