Goncharov AF, Struzhkin VV, Somayazulu MS, Hemley RJ, Mao HK
Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
Science. 1996 Jul 12;273(5272):218-20. doi: 10.1126/science.273.5272.218.
Protonated and deuterated ices (H2O and D2O) compressed to a maximum pressure of 210 gigapascals at 85 to 300 kelvin exhibit a phase transition at 60 gigapascals in H2O ice (70 gigapascals in D2O ice) on the basis of their infrared reflectance spectra determined with synchrotron radiation. The transition is characterized by soft-mode behavior of the nu3 O-H or O-D stretch below the transition, followed by a hardening (positive pressure shift) above it. This behavior is interpreted as the transformation of ice phase VII to a structure with symmetric hydrogen bonds. The spectroscopic features of the phase persisted to the maximum pressures (210 gigapascals) of the measurements, although changes in vibrational mode coupling were observed at 150 to 160 gigapascals.
在85至300开尔文下被压缩至最高210吉帕斯卡压力的质子化和氘代冰（H₂O和D₂O），根据用同步辐射测定的红外反射光谱，H₂O冰在60吉帕斯卡（D₂O冰在70吉帕斯卡）时会发生相变。该转变的特征是在转变温度以下，ν₃ O-H或O-D伸缩振动呈现软模行为，在转变温度以上则变硬（正压移）。这种行为被解释为冰的VII相转变为具有对称氢键的结构。尽管在150至160吉帕斯卡观察到了振动模式耦合的变化，但该相的光谱特征在测量的最高压力（210吉帕斯卡）下仍然存在。
