@article{8892cd4b5bfd41b986792c5b51f4b946,
title = "High-Pressure Study of Perovskites and Postperovskites in the (Mg,Fe)GeO3 System",
abstract = "The effect of incorporation of Fe2+ on the perovskite (Pbnm) and postperovskite (Cmcm) structures was investigated in the (Mg,Fe)GeO3 system at high pressures and temperatures using laser-heated diamond anvil cell and synchrotron X-ray diffraction. Samples with compositions of Mg# ≥ 48 were shown to transform to the perovskite (∼30 GPa and ∼1500 K) and postperovskite (>55 GPa, ∼1600-1800 K) structures. Compositions with Mg# ≥ 78 formed single-phase perovskite and postperovskite, whereas those with Mg# < 78 showed evidence for partial decomposition. The incorporation of Fe into the perovskite structure causes a decrease in octahedral distortion as well as a modest decrease in bulk modulus (K0) and a modest increase in zero-pressure volume (V0). It also leads to a decrease in the perovskite-to-postperovskite phase transition pressure by ∼9.5 GPa over compositions from Mg#78 to Mg#100.",
author = "Stan, {Camelia V.} and Rajkrishna Dutta and Cava, {Robert J.} and Prakapenka, {Vitali B.} and Duffy, {Thomas S.}",
note = "Funding Information: This work was supported by the National Science Foundation (NSF) Grant EAR-1415321. Synthetic work was supported by the United States (US) Department of Energy (DOE), Division of Basic Energy Sciences, Grant DE-FG02-08ER46544. We acknowledge the use of GeoSoilEnviroCARS, which is supported by the NSF (Grant EAR-1634415), and the DOE (Grant DE-FG02-94ER14466). The use of the high-pressure gas loading system was supported by GeoSoilEnviroCARS and the Consortium for Materials Properties Research in the Earth Sciences, under NSF Cooperative Agreement EAR-1606856. Use of the Advanced Photon Source, operated for the DOE by Argonne National Laboratory was supported by the DOE under Contract DE-AC02-06CH11357. This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under Contract DE-AC02-05CH11231. Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",
year = "2017",
month = jul,
day = "17",
doi = "10.1021/acs.inorgchem.7b00774",
language = "English (US)",
volume = "56",
pages = "8026--8035",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "14",
}