Structure of high-density amorphous ice under pressure
Structure of high-density amorphous ice under pressure
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DOI：
10.1103/physrevlett.89.285502
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发表时间：
2002-12-31
影响因子：
8.6
通讯作者：
Soper, AK
中科院分区：
文献类型：
--
作者：
Klotz, S;Hamel, G;Soper, AK
我们报道了在100 K温度下，压力高达2.2 GPa时对高密度无定形冰（HDA）进行的原位中子衍射研究。我们发现，压缩是通过第二近邻配位壳层的强烈收缩（约20%）实现的，因此在2.2 GPa时，它与第一配位壳层非常接近，而第一配位壳层本身在结构和尺寸上都保持完整。氢键取向表明第一和第二壳层之间不存在氢键，并且在压力下HDA具有越来越相互贯穿的氢键网络。
We report in situ neutron diffraction studies of high-density amorphous ice (HDA) at 100 K at pressures up to 2.2 GPa. We find that the compression is achieved by a strong contraction (similar to20%) of the second neighbor coordination shell, so that at 2.2 GPa it closely approaches the first coordination shell, which itself remains intact in both structure and size. The hydrogen bond orientations suggest an absence of hydrogen bonding between first and second shells and that HDA has increasingly interpenetrating hydrogen bond networks under pressure.