Minerals
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#. olivine, peridot 橄榄石
#. majorite 镁铁榴石
#. pyroxene 辉石
#. garnet 石榴石
#. akimotoite

ringwoodite(尖晶橄榄石)
    - (Mg,Fe)2SiO4
    - Named after A. E. Ringwood, in 1969
    - 660 km: ringwoodite --> ferropericlase + bridgmanite

bridgmanite
    - the most abundant mineral in Earth's lower mantle.
    - 38% of Earth's volume
    - called silicate perovskite before the paper :doi:`10.1126/science.1259369`.
    - magnesium iron silicate (Mg,Fe)SiO3

magnesiowustite/ferropericlase 铁方镁石
    - (Mg,Fe)O