@article{oai:repo.qst.go.jp:00086606,
 author = {Mashino, Izumi and Murakami, Motohiko and Kitao, Shinji and Mitsui, Takaya and Masuda, Ryo and Seto, Makoto and Takaya, Mitsui},
 journal = {Geophysical Research Letters},
 month = {Jun},
 note = {We conducted in-situ high-pressure acoustic wave velocitymeasurements of Fe2+-bearing MgSiO3 glass up to 158 GPaby means of Brillouin scattering spectroscopy to understand the effect of iron on silicate melt in the lower mantle.Thechange in trend of the velocity profile, likely induced by the structural transition in Si-O coordination numberproposedin previous studies of silicate glasses, is also observed around 129 GPa. The transition pressurebecomes 125-128 GPa when considering the iron content of melts in a pyrolitic or chondritic mantle, whichis lower than the pressures of the CMB and the ULVZs. Our datashowthe substitution of 12mol% Fe in MgSiO3 glass decreases the VS by ~5.5 %. This study implies that iron considerably affect onthe buoyancy relations between melts/crystals and the iron-bearing melts at the lowermost mantle will have thehigher coordination numberthan sixfold.},
 title = {Acoustic wave  velocities  of  ferrous-bearing  MgSiO3  glass  up to 158  GPa with  2  implications for dense silicate melts at the base of the Earth’s mantle},
 year = {2022}
}