Elastic properties of several high-pressure mantle phases and high-temperature Brillouin spectroscopy

Laser Brillouin spectroscopy has been used to characterize the elastic properties of several high-pressure silicate phases which are important for elucidating the mineralogy and the composition of the Earth's mantle. The silicates examined are: two synthetic polycrystalline majorite garnets and MgSiO;The garnet compressional and shear acoustic velocities calculated from the Brillouin measurements are: V;The bulk and shear moduli (VRH) for MgSiO;Another important observation is that MgSiO...