Search for the distorted counterpart of ice XV and hydrogen-ordered ice IV

Water ice displays a remarkably complex phase diagram. The last five years have seen rapid developments in this area of research with the discovery of three new phases of ice. Our team has been involved in the discovery of ice XIX and shown that ice XIX is a distorted version of the well-known ice VI. The type of distortion observed during the ice VI to ice XIX phase transition is similar to the ones observed for perovskites under pressure and we will now investigate if such distortions are also possible for ice XV, the hydrogen-ordered counter part of ice VI. Additionally, we will also search for the so far unidentified hydrogen-ordered counterpart of ice IV. In summary, these experiments may lead to the discovery of two new phases of ice. In any case, we will gain new and highly valuable insights into the low-temperature / high-pressure behaviour of ice.

水冰拥有极为复杂的相图。近五年来，该研究领域发展迅猛，现已发现三种全新的冰相。我们团队参与了冰 XIX（ice XIX）的发现工作，并证实冰 XIX（ice XIX）是广为人知的冰 VI（ice VI）的畸变变体。在冰 VI（ice VI）向冰 XIX（ice XIX）的相变过程中所观测到的畸变类型，与高压环境下钙钛矿中出现的畸变类型高度相似；我们后续将探究，冰 VI（ice VI）的氢有序对应体冰 XV（ice XV）是否也存在此类畸变。此外，我们还将搜寻迄今尚未被确认的冰 IV（ice IV）的氢有序对应体。综上，本实验有望发现两种全新的冰相。无论最终结果如何，我们都将在冰的低温/高压行为研究方面获得全新且极具价值的深入见解。