He came into an inheritance from his father. Flow in the deep mantle is thought to create deformation textures in the high-pressure mineral post-perovskite (Child), which is transformed from magnesium-silicate perovskite (Father) in the lower mantle. Laboratory simulations of the transformation between lower-pressure perovskite and post-perovskite in a fluoride analogue system show that post-perovskite can also inherit textures from the perovskite phase, and vice versa (See Figure below). This texture inheritance during the transition, combined with a single slip system in post-perovskite, can explain the seismic anisotropy of the lowermost mantle. We have for the first time confirmed the topotaxy relations (Inheritance) between the two structures experimentally, by using a 200 kV-transmission electron microscope at Bayerisches Geoinstitut.
High-resolution TEM image: Perovskite (Pv) and post-perovskite (PPv) domains are labelled. Inset: Selected area electron diffraction pattern from the area. The electron diffraction pattern indicates the topotaxy relations between the two structures.