Article
Licensed
Unlicensed
Requires Authentication
Determination of high-pressure phase equilibria of Fe2O3 using the Kawai-type apparatus equipped with sintered diamond anvils
-
Eiji Ito
,
Hiroshi Fukui
Published/Copyright:
April 1, 2015
Abstract
Phase equilibria of Fe2O3 have been studied up to 58 GPa and 1400 K using the Kawai-type multi anvil apparatus equipped with sintered diamond anvils. Identification of phases and pressure determination has been carried out by means of in situ X-ray observation using synchrotron radiation at SPring-8. Hematite (phase I) successively transforms to the Rh2O3(II)-type structure (phase II) and then to an orthorhombic structure (phase III) with increasing pressure. The transformations of hematite into high-pressure phases have been observed only at temperatures higher than 500 K, which is not concordant with previous results obtained by using the diamond anvil cell. Volume changes accompanied by the I-II and II-III transformations are calculated to be -2.8 and -5.0%, respectively. The phase boundary between I and II phases and that between II and III have been proposed to be P (GPa) = -0.015 T (K) + 44.2 and P (GPa) = -0.005 T (K) + 48.7, respectively. Possible correlation between a Mott transition and the phase stabilities may be concealed at room temperature due to slow reaction kinetics of the structural transformations.
Keywords : High-pressure phase equilibria; Fe2O3; Kawai-cell; sintered diamond; in situ X-ray observation
Received: 2007-12-28
Accepted: 2008-10-7
Published Online: 2015-4-1
Published in Print: 2009-2-1
© 2015 by Walter de Gruyter Berlin/Boston
You are currently not able to access this content.
You are currently not able to access this content.
Articles in the same Issue
- Determination of high-pressure phase equilibria of Fe2O3 using the Kawai-type apparatus equipped with sintered diamond anvils
- Suhailite, a new ammonium trioctahedral mica
- First record of K-cymrite in North Qaidam UHP eclogite, Western China
- Stability of uranium (VI) peroxide hydrates under ionizing radiation
- Heat capacities and thermodynamic functions of TiO2 anatase and rutile: Analysis of phase stability
- The behavior of Co and Ni in olivine in planetary basalts: An experimental investigation
- Partitioning of Ni between olivine and an iron-rich basalt: Experiments, partition models, and planetary implications
- The application of Lorentz transmission electron microscopy to the study of lamellar magnetism in hematite-ilmenite
- A Monte Carlo study of short- and long-range order of tetrahedral cations in sapphirine and khmaralite
- High-pressure ammonium-bearing silicates: Implications for nitrogen and hydrogen storage in the Earth’s mantle
- Formation of aragonite mesocrystals and implication for biomineralization
- U-Pb age, trace-element, and Hf-isotope compositions of zircon in a quartz vein from eclogite in the western Dabie Mountains: Constraints on fluid flow during early exhumation of ultrahigh-pressure rocks
- Interaction of phosphate-bearing solutions with gypsum: Epitaxy and induced twinning of brushite (CaHPO4·2H2O) on the gypsum cleavage surface
- Fukalite: An example of an OD structure with two-dimensional disorder
- Chemical control of 3T stacking order in a Li-poor biotite mica
- Site preference of U and Th in Cl, F, and Sr apatites
- High-pressure structural behavior of ingersonite, Ca3Mn2+Sb5+4O14: An in-situ single-crystal X-ray study
- Crystal chemistry of Fe32+Cr2Si3O12–Fe32+Fe23+Si3O12 garnet solid solutions and related spinels
- A method to synthesize large fluid inclusions in quartz at controlled times and under unfavorable growth conditions
- The stability of methane hydrate intercalates of montmorillonite and nontronite: Implications for carbon storage in ocean-floor environments
- Structure and carbonate orientation of vaterite (CaCO3)
- Qusongite (WC): A new mineral
- Nanoscale “liquid” inclusions of As-Fe-S in arsenian pyrite
- Water speciation in hydrous silicate and aluminosilicate glasses: Direct evidence from 29Si-1H and 27Al-1H double-resonance NMR
- Acid production by FeSO4·nH2O dissolution and implications for terrestrial and martian aquatic systems
Keywords for this article
High-pressure phase equilibria;
Fe2O3;
Kawai-cell;
sintered diamond;
in situ X-ray observation
Articles in the same Issue
- Determination of high-pressure phase equilibria of Fe2O3 using the Kawai-type apparatus equipped with sintered diamond anvils
- Suhailite, a new ammonium trioctahedral mica
- First record of K-cymrite in North Qaidam UHP eclogite, Western China
- Stability of uranium (VI) peroxide hydrates under ionizing radiation
- Heat capacities and thermodynamic functions of TiO2 anatase and rutile: Analysis of phase stability
- The behavior of Co and Ni in olivine in planetary basalts: An experimental investigation
- Partitioning of Ni between olivine and an iron-rich basalt: Experiments, partition models, and planetary implications
- The application of Lorentz transmission electron microscopy to the study of lamellar magnetism in hematite-ilmenite
- A Monte Carlo study of short- and long-range order of tetrahedral cations in sapphirine and khmaralite
- High-pressure ammonium-bearing silicates: Implications for nitrogen and hydrogen storage in the Earth’s mantle
- Formation of aragonite mesocrystals and implication for biomineralization
- U-Pb age, trace-element, and Hf-isotope compositions of zircon in a quartz vein from eclogite in the western Dabie Mountains: Constraints on fluid flow during early exhumation of ultrahigh-pressure rocks
- Interaction of phosphate-bearing solutions with gypsum: Epitaxy and induced twinning of brushite (CaHPO4·2H2O) on the gypsum cleavage surface
- Fukalite: An example of an OD structure with two-dimensional disorder
- Chemical control of 3T stacking order in a Li-poor biotite mica
- Site preference of U and Th in Cl, F, and Sr apatites
- High-pressure structural behavior of ingersonite, Ca3Mn2+Sb5+4O14: An in-situ single-crystal X-ray study
- Crystal chemistry of Fe32+Cr2Si3O12–Fe32+Fe23+Si3O12 garnet solid solutions and related spinels
- A method to synthesize large fluid inclusions in quartz at controlled times and under unfavorable growth conditions
- The stability of methane hydrate intercalates of montmorillonite and nontronite: Implications for carbon storage in ocean-floor environments
- Structure and carbonate orientation of vaterite (CaCO3)
- Qusongite (WC): A new mineral
- Nanoscale “liquid” inclusions of As-Fe-S in arsenian pyrite
- Water speciation in hydrous silicate and aluminosilicate glasses: Direct evidence from 29Si-1H and 27Al-1H double-resonance NMR
- Acid production by FeSO4·nH2O dissolution and implications for terrestrial and martian aquatic systems
