http://serc.carleton.edu/NAGTWorkshops/petrology/discussion/18007.html#discussion http://serc.carleton.edu/NAGTWorkshops/petrology/discussion/18007.html#post1275 Sumit Chakraborty 1177632780 http://serc.carleton.edu/NAGTWorkshops/petrology/discussion/18007.html#post1275 http://serc.carleton.edu/NAGTWorkshops/petrology/discussion/18007.html#post1276 The mineral deep in the earth is not perovskite of course. That is a phase with the formula CaTiO3 (it is further complicated by having several related structures). By the way there is no such thing as magnesiowustite either (or ferropericlase), it is just periclase (or if one has > 10 mol % Fe, ferroan periclase is an option.). Using magnesiowustite or ferropericlase is rather like the terms sodioanorthite, calcioalbite or titanostishovite. A little known fact to many mineral physicists is that periclase is also stable at low pressure (even if it is ferroan), occurring in marbles from contact aureoles and rarely in magnesian carbonatites. If mineral physicists really want to communicate with mineralogists and petrologists they should use correct mineral names when they are available.
Eric]]> Eric Essene 1177679040 http://serc.carleton.edu/NAGTWorkshops/petrology/discussion/18007.html#post1276