title: Stability of Fe,Al-bearing bridgmanite in the lower mantle and synthesis of pure Fe-bridgmanite.
abstract: The physical and chemical properties of Earth's mantle, as well as its dynamics and evolution, heavily depend on the phase composition of the region. On the basis of experiments in laser-heated diamond anvil cells, we demonstrate that Fe,Al-bearing bridgmanite (magnesium silicate perovskite) is stable to pressures over 120 GPa and temperatures above 3000 K. Ferric iron stabilizes Fe-rich bridgmanite such that we were able to synthesize pure iron bridgmanite at pressures between ~45 and 110 GPa. The compressibility of ferric iron-bearing bridgmanite is significantly different from any known bridgmanite, which has direct implications for the interpretation of seismic tomography data.
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.; Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Leyla
authors.identifier: 0000-0003-0688-4022
authors.initials: L
authors.lastname: Ismailova
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Elena
authors.initials: E
authors.lastname: Bykova
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Maxim
authors.identifier: 0000-0003-0248-1728
authors.initials: M
authors.lastname: Bykov
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.; European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France.
authors.forename: Valerio
authors.initials: V
authors.lastname: Cerantola
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Catherine
authors.initials: C
authors.lastname: McCammon
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Tiziana
authors.initials: T
authors.lastname: Boffa Ballaran
authors.affiliation: Department of Petrology, Geological Faculty, Moscow State University, 119234 Moscow, Russia.
authors.forename: Andrei
authors.initials: A
authors.lastname: Bobrov
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Sinmyo
authors.affiliation: Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Natalia
authors.initials: N
authors.lastname: Dubrovinskaia
authors.affiliation: Photon Science, Deutsches Elektronen-Synchrotron, Notkestrasse 85, D-22603 Hamburg, Germany.
authors.forename: Konstantin
authors.identifier: 0000-0002-5296-9265
authors.initials: K
authors.lastname: Glazyrin
authors.affiliation: Photon Science, Deutsches Elektronen-Synchrotron, Notkestrasse 85, D-22603 Hamburg, Germany.
authors.forename: Hanns-Peter
authors.initials: HP
authors.lastname: Liermann
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.; European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France.; Institut für Mineralogie, University of Münster, Corrensstrasse 24, 48149 Münster, Germany.
authors.forename: Ilya
authors.initials: I
authors.lastname: Kupenko
authors.affiliation: European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France.
authors.forename: Michael
authors.initials: M
authors.lastname: Hanfland
authors.affiliation: Center for Advanced Radiation Sources, University of Chicago, 9700 South Cass Avenue, Argonne, IL 60437, USA.
authors.forename: Clemens
authors.identifier: 0000-0002-9556-1032
authors.initials: C
authors.lastname: Prescher
authors.affiliation: Center for Advanced Radiation Sources, University of Chicago, 9700 South Cass Avenue, Argonne, IL 60437, USA.
authors.forename: Vitali
authors.initials: V
authors.lastname: Prakapenka
authors.affiliation: European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France.
authors.forename: Volodymyr
authors.initials: V
authors.lastname: Svitlyk
authors.affiliation: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: Leonid
authors.initials: L
authors.lastname: Dubrovinsky
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D017610:Calcium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D018534:Earth, Planet; D007501:Iron / Q000737:chemistry*; D017633:Magnesium Silicates / Q000138:chemical synthesis / Q000737:chemistry*; D010087:Oxides / Q000138:chemical synthesis / Q000737:chemistry*; D011312:Pressure; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017610:Calcium Compounds; D017633:Magnesium Silicates; D010087:Oxides; C059910:perovskite; D000535:Aluminum; D014025:Titanium; D007501:Iron
keywords: Bridgmanite; diamond anvil cell; laser heating; lower mantle; single crystal x-ray diffraction