Perovskite : A dense, high-pressure phase of pyroxene [[(Mg, Fe, Ca)SiO3; it is only stable at high pressures (above ~20 GPa), but is thought to be the predominant mineral of the Earth's mantle. See Jeanloz (2002)
Peter Bormann, Keiiti Aki, William H. K. Lee, and Johannes Schweitzer (Compilers and Amenders), Glossary of Terms Interest to Earthquake and Engineering Seismologists (Version 1), Publication records from external use of GFZ scientific infrastructure, Germany 2011. http://gfzpublic.gfz-potsdam.de/pubman/item/escido c:56137:3/component/escidoc:56143/Glossary_rev1.pd f, (ND/ Erthq - Amer) {980}