Natural perovskite: (Ca^II _0.95 (1)Ce^III _0.011 (2)Na^I _0.010 (4))(Fe^III _0.022 (2)Ti^IV _0.98 (1))O₃

Abstract

A natural sample of perovskite (calcium caesium sodium iron titanium oxide) from the Tapira Alkaline Complex in southeastern Brazil was found by electron microprobe analysis to have the chemical formula (Ca2+ 0.95 (1)Ce3+ 0.011 (2)Na+ 0.010 (4))(Fe3+ 0.022 (2)Ti4+ 0.98 (1))O2− 3 and by IR spectroscopy to be an anhydrous mineral. Oxygen anions are arranged around Ti4+ in an almost perfect octa­hedron and around Ca2+ in a distorted 12-fold polyhedron.