high pressure magnetite

High‐pressure study of stability of magnetite by

[1] Thermodynamic analysis and synchrotron X-ray diffraction experiments aimed at the investigation of stability of magnetite were carried out in the pressure-temperature ranges

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Magnetic and electronic properties of magnetite across

2019-3-14 An application of high pressure affects anomalously the behavior of magnetic and electronic properties of magnetite, ultimately leading to a structural phase transition above P ~

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Equation of state of magnetite and its high-pressure

2000-3-1 Fe 3 O 4 has been studied by high-pressure diffraction to 43 GPa. No major changes in the spinel-type structure of magnetite is observed below 21.8 GPa. At higher pressure a

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High-pressure elasticity of a natural magnetite crystal

2004-7-1 Pressure-induced shear-mode softening in magnetite is most likely related to magnetoelastic coupling and the first-order phase transition to an orthorhombic structure

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High-pressure neutron diffraction study of magnetite,

2022-6-6 We use in situ high-pressure neutron powder diffraction to study elastic properties of Fe 3 O 4 magnetite nanoparticles of different sizes. It is found that nanoparticles are elastically

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Abnormal Elastic and Vibrational Behaviors of Magnetite

2014-9-4 High-pressure HERIX spectra of the single-crystal magnetite platelet with the pre-oriented (100) crystallographic plane were measured up to 19 GPa in a DAC for the lower

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Novel high pressure magnetic measurements with

2002-5-22 [1] We report a novel system designed to measure reversible magnetic susceptibility of micron-sized samples under high pressures in a diamond anvil cell. We find that magnetite

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Magnetite an overview ScienceDirect Topics

Recent in situ diffraction experiments suggest the high-pressure form of magnetite (h-Fe 3 O 4) is orthorhombic (Bbmm) with the CaTi 2 O 4-type structure (Haavik et al., 2000; Dubrovinsky et

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Magnetite an overview ScienceDirect Topics

Limited research on the effect of high pressure and salinity on solubility of magnetite has been conducted. Measuring the magnetite solubility has proven to be more difficult than that of other

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Spin state of iron in Fe${}_{3}$O${}_{4}$ magnetite and $h

2013-4-22 The high-pressure behavior of magnetite has been widely debated in the literature. Experimental measurements have found conflicting high-pressure transitions: a charge

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High-pressure neutron diffraction study of magnetite,

2022-6-6 We use in situ high-pressure neutron powder diffraction to study elastic properties of Fe 3 O 4 magnetite nanoparticles of different sizes. It is found that nanoparticles are elastically softer than the bulk. Apart from the smallest nanoparticle of diameter 8 nm, the atomic and magnetic structures do not change significantly with nanoparticle size or pressure.

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Novel high pressure magnetic measurements with

2002-5-22 [1] We report a novel system designed to measure reversible magnetic susceptibility of micron-sized samples under high pressures in a diamond anvil cell. We find that magnetite reversible hysteresis parameters vary <15% below 0.6 to 1.0 GPa, while at higher pressures significant increases occur in (1) bulk coercivity (Hc) and (2) the ratio of saturation remanent

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Abnormal elastic and vibrational behaviors of magnetite at

2014-9-4 Magnetite exhibits unique electronic, magnetic, and structural properties in extreme conditions that are of great research interest. Previous studies have suggested a number of transitional models, although the nature of magnetite at high pressure remains elusive. We have studied a highly stoichiome

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High-Pressure crystal chemistry of spinel (MgAl2O4) and

High-pressure crystal structures and compressibilities have been determined by x-ray methods for MgAl2O4 spinel and its isomorph magnetite, Fe3O4. The measured bulk moduli, K, of spinel and magnetite (assuming K′=4) are 1.94±0.06 and 1.86±0.05 Mbar, respectively, in accord with previous ultrasonic determinations. The oxygen u parameter, the only variable atomic position

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In situ observation of the breakdown of magnetite

2012-12-29 the high-pressure BreAKdoWn oF mAgnetite Two experiments were performed following similar pressure-temperature paths; the paths for Mag_1 and Mag_2 are presented in Figure 1. Sample Mag_1 was compressed to ∼12 GPa (i.e., beyond the stability field of magnetite, Schollenbruch et al. 2011) and then heated up to a temperature of about 1200 K. In a

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Thermally Induced Anomaly in the Shear Behavior of

2018-8-9 Figure 3 (a) Selected x-ray diffraction patterns for Fe 3 O 4 magnetite at high pressure and high temperature. The peaks of magnetite are indexed (PDF 76-1849), and the peaks labeled by Au and Na Cl are from the gold foil and pressure marker used in this study. (b) Compressional (V P) and shear (V S) wave velocities for Fe 3 O 4 magnetite spinel at high pressure and room

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Novel Pressure-Induced Magnetic Transition in

2008-2-4 ditions to examine the magnetic properties of magnetite in the pressure range where the reported electronic and mag-netic transitions occur. Compared with other probes of magnetism at high pressure, including Mo¨ssbauer spec-troscopy, ac susceptibility, and x-ray emission spectros-copy, XMCD is a particularly powerful local probe that

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Spin state of iron in Fe3O4 magnetite and h-Fe3O4

2013-4-22 Amongst iron oxides, the high-pressure behavior of Fe 3 O 4 magnetite is still widely debated, 33 but a decrease of the Verwey transition temperature with P has been reported using different

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Preboiler & Industrial Boiler Corrosion Control

2022-7-4 Magnetite is dissolved and yields an acid solution containing both ferrous (Fe²+) and ferric (Fe³+) chlorides (ferric chlorides are very corrosive to steel and copper) Fe 3 O 4 + High-pressure alkaline water is an effective

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Phys. Rev. Lett. 126, 065702 (2021) Tungsten Hexanitride

2021-2-8 Figure 3. Unit cell parameters and volume of the R 3 ¯ m-structured WN 6 phase at high pressure. (a) Pressure-dependent unit cell parameters of the WN 6 phase from XRD results. Solid and open red triangles represent a parameter in compression and decompression cycle, respectively. Solid and open green triangles represent c parameter in compression and

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High-pressure phase of magnetite. Semantic Scholar

DOI: 10.1103/PHYSREVB.50.6446 Corpus ID: 42960914; High-pressure phase of magnetite. @article{Pasternak1994HighpressurePO, title={High-pressure phase of magnetite.}, author={Pasternak and Nasu and Wada and Endo}, journal={Physical review.

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High-pressure elasticity of a natural magnetite crystal

2004-7-1 Pressure-induced shear-mode softening in magnetite is most likely related to magnetoelastic coupling and the first-order phase transition to an orthorhombic structure above 21 GPa. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

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High-pressure neutron diffraction study of magnetite,

2022-6-6 We use in situ high-pressure neutron powder diffraction to study elastic properties of Fe3O4 magnetite nanoparticles of different sizes. It is found that nanoparticles are elastically softer than t...

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High-pressure studies of magnetite and magnesioferrite

Made available by U.S. Department of Energy Office of Scientific and Technical Information

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Novel high pressure magnetic measurements with

2002-5-22 [1] We report a novel system designed to measure reversible magnetic susceptibility of micron-sized samples under high pressures in a diamond anvil cell. We find that magnetite reversible hysteresis parameters vary <15% below 0.6 to 1.0 GPa, while at higher pressures significant increases occur in (1) bulk coercivity (Hc) and (2) the ratio of saturation remanent

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Cementite Formation from Magnetite under High Pressure

2. Experimental. High pressure magnetic suspension thermogravimetric analysis (TGA) system was used for the kinetic study of Fe 3 C formation by measuring the weight change with an accuracy of 1 μg. In the magnetic suspension balance system, a measuring microbalance is separated from a reacting cell and the suspension force is transmitted without direct contact

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Thermally Induced Anomaly in the Shear Behavior of

2018-8-9 Figure 3 (a) Selected x-ray diffraction patterns for Fe 3 O 4 magnetite at high pressure and high temperature. The peaks of magnetite are indexed (PDF 76-1849), and the peaks labeled by Au and Na Cl are from the gold foil and pressure marker used in this study. (b) Compressional (V P) and shear (V S) wave velocities for Fe 3 O 4 magnetite spinel at high pressure and room

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Novel Pressure-Induced Magnetic Transition in

2008-2-4 ditions to examine the magnetic properties of magnetite in the pressure range where the reported electronic and mag-netic transitions occur. Compared with other probes of magnetism at high pressure, including Mo¨ssbauer spec-troscopy, ac susceptibility, and x-ray emission spectros-copy, XMCD is a particularly powerful local probe that

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Phys. Rev. Lett. 126, 065702 (2021) Tungsten Hexanitride

2021-2-8 Figure 3. Unit cell parameters and volume of the R 3 ¯ m-structured WN 6 phase at high pressure. (a) Pressure-dependent unit cell parameters of the WN 6 phase from XRD results. Solid and open red triangles represent a parameter in compression and decompression cycle, respectively. Solid and open green triangles represent c parameter in compression and

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Mechanism and kinetics of magnetite oxidation under

Abstract. The stability of magnetite under oxidizing hydrothermal conditions was evaluated at temperatures of 120, 150, 180 and 275 °C. A well-characterized sample of commercially-available magnetite with a particle size of approximately 690 nm was oxidized by dissolved oxygen (DO) under alkaline hydrothermal conditions in titanium autoclaves.

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high pressure magnetite

High‐pressure study of stability of magnetite by

Magnetic and electronic properties of magnetite across

Equation of state of magnetite and its high-pressure

High-pressure elasticity of a natural magnetite crystal

High-pressure neutron diffraction study of magnetite,

Abnormal Elastic and Vibrational Behaviors of Magnetite

Novel high pressure magnetic measurements with

Magnetite an overview ScienceDirect Topics

Magnetite an overview ScienceDirect Topics

Spin state of iron in Fe${}_{3}$O${}_{4}$ magnetite and $h

High-pressure neutron diffraction study of magnetite,

Novel high pressure magnetic measurements with

Abnormal elastic and vibrational behaviors of magnetite at

High-Pressure crystal chemistry of spinel (MgAl2O4) and

In situ observation of the breakdown of magnetite

Thermally Induced Anomaly in the Shear Behavior of

Novel Pressure-Induced Magnetic Transition in

Spin state of iron in Fe3O4 magnetite and h-Fe3O4

Preboiler & Industrial Boiler Corrosion Control

Phys. Rev. Lett. 126, 065702 (2021) Tungsten Hexanitride

High-pressure phase of magnetite. Semantic Scholar

High-pressure elasticity of a natural magnetite crystal

High-pressure neutron diffraction study of magnetite,

High-pressure studies of magnetite and magnesioferrite

Novel high pressure magnetic measurements with

Cementite Formation from Magnetite under High Pressure

Thermally Induced Anomaly in the Shear Behavior of

Novel Pressure-Induced Magnetic Transition in

Phys. Rev. Lett. 126, 065702 (2021) Tungsten Hexanitride

Mechanism and kinetics of magnetite oxidation under

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