在压力为13.5 GPa 和温度为1030℃的实验中,水的存在极大地提高了由橄榄石的相变形成的瓦兹利石的生长速率。有水时,瓦兹利石具有低位错密度和亚晶界。水促进了瓦兹利石的位错恢复,引起了与相变伴随的局部压力降的非弹性张弛,从而增加了生长速率。这些结果说明,很少量的水(重量的0.05%)也能够弱化地幔中的瓦兹利石。 The presence of water at a pressure of 13.5 GPa and a temperature of 1030 ° C greatly enhanced the growth rate of the Waszite formed by the phase transformation of olivine. When water is present, the Waszierite has low dislocation density and subgrain boundaries. Water promotes the dislocation recovery of the Wasatchite, induces an inelastic relaxation of the local pressure drop associated with the phase transformation, thereby increasing the growth rate. These results show that a very small amount of water (0.05% by weight) can also weaken the basalts in the mantle.