On Earth, most ice is found in the hexagonal Ice I h phase. Less common phases may be found in the atmosphere and underground due to more extreme pressures and temperatures. Some …

冰III，读作“冰三”，是 冰 的一种 晶体 形态，属于 四方晶系，可以将 水 在 300 MPa 下降温到 250 K （-23.15 °C） 制得。 它在所有高压水 相 中是密度最低的，在 350 MPa 下仅 1160 kg/m3。

III相：III相也叫低温冰，是在低温下形成的冰相。 III相的分子结构为正十二面体结构，每个氧原子周围有12个氢原子成键，每个氢原子周围有两个氧原子成键。

Ice-three (ice III) is formed from water at 300 MPa by lowering its temperature to 250 K (see Phase Diagram). It is stable over a relatively small range of conditions in the P-T phase space.

The analysis of the ice III diffraction patterns leads to a body‐centered orthorhombic structure, and a unit cell of dimensions a =10.20A, b =5.87A, and c =7.17A. The unit cell contains sixteen …

We found ice II to be the strongest of the high-pressure phases, having a strength roughly comparable to that of ice I. Ice III is very weak: at fixed levels of stress, ice III flows 10 2 -10 3 …

Ice III, least dense of the high pressure forms of ice (0c= 1.160 g.cm-3 at -175°C, 1 atm), has a tetra- gonal structure (P41212, a= 6.73, c= 6.83/~,) involving a tetrahedrally linked H-bond …

The transformations that occur in ices II, III, and V at atmospheric pressure when they are heated from liquid‐nitrogen temperature have been examined by simple thermal analysis and by x‐ray …

2004年7月1日 · Thermodynamic properties of high-pressure ice polymorphs, ices III and V, are studied theoretically. The results of TIP4P molecular dynamics simulations in the NPT …

Metastable ice-three may be formed within the ice-two phase space by raising the compression rate in the density driven phase transition from hexagonal ice down to 170 K [1545].