the conductivity difference between ringwoodite and this mineral explains the conductivity jump at the 660-kilometer discontinuity.
Lin-gun Liu of the Australian National University demonstrated that enstatite can rearrange to be isostructural to this mineral, and "theoretical and experimental evidence" for its transformation is provided in a paper by Organov and Ono. Initially described and named by Gustav Rose, the conductivity difference between ringwoodite and this mineral explains the conductivity jump at the 660-kilometer discontinuity. It was examined by Georg Bednorz and Alex Muller in experiments at IBM in Zurich on superconductivity in 1986. In addition, a phase transition in this mineral is believed to account for the 2600-kilometer discontinuity and explain the D-double prime layer, where we begin to see the appearance ►of the "post-" form of it. FTP, name this pseudocubic mineral consisting of calcium titanium oxide.   
Lin-gun Liu of the Australian National University demonstrated that enstatite can rearrange to be isostructural to this mineral, and "theoretical and experimental evidence" for its transformation is provided in a paper by Organov and Ono.
perovskite