Abstract Mantle flow dynamics can cause preferential alignment of olivine crystals that results in anisot-ropy of physical properties. To interpret anisotropy in mantle rocks, it is necessary to understand the anisot-ropy of olivine single crystals. We determined anisotropy of magnetic susceptibility (AMS) for natural olivine
Abstract Although nucleation of magnetite and/or hematite along dislocations upon oxidation of olivine has been observed by many workers, the effect of oxidation on the magnetic properties of the sample with specific mineralogical alterations has not been studied. Therefore, we investigate this problem using a set of time series 1 bar oxidation …
A prerequisite for the industrial application of any chemical process is a thorough understanding of the reaction mechanisms and reaction kinetics. A likewise knowledge of the factors that determine the rate of dissolution of olivine in acids at elevated temperatures is essential for the design of an industrial plant for the neutralization of …
Amorphization at grain boundaries in olivine-rich rocks under stress and consequent grain-boundary sliding could explain the decrease in viscosity between the lithosphere and the asthenosphere.
Here we combine several electron microscopic techniques to fully characterize these mineralogical transformations and relate them to the measured magnetic properties. Phase changes indicate a reduction or dissociation process that likely takes place during large shock events, causing the formation of metallic precipitates in …
Olivine Separation. Normally, olivine separation is not done. However, olivine can be rapidly separated from rocks such as basalt using a variant on the froth flotation method known as grease tabling. Grease tabling is commonly used in the diamond mining industry because diamonds are naturally hydrophobic. Magnetically separate the sample using ...
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Paleomagnetism is the study of the Earth's ancient magnetic field, based on the measurement and analysis of the remanent (i.e., permanent) magnetization acquired by rocks during their formation.
Mantle flow dynamics can cause preferential alignment of olivine crystals that results in anisotropy of physical properties. To interpret anisotropy in mantle rocks, it is necessary to understand the anisotropy of olivine single crystals. We determined anisotropy of magnetic susceptibility (AMS) for natural olivine crystals.
We find a novel, ultrafast transformation mechanism of olivine within the shock-induced high-pressure state. An ultrafast and coherent shearing of oxygen layers are confirmed to occur, the first ...
CO 2 sequestration by reaction with abundant, reactive minerals such as olivine has often been considered. The most straightforward, direct process consists in performing the reaction at high temperature and CO 2 pressure, in view to producing silica, magnesium and iron carbonates and recovering the traces of nickel and chromite contained in the …
Mineral magnetism is affected by many factors. The magnetic properties of minerals from different producing areas and deposits are usually different, sometimes even very different, which is caused by different conditions in the mineral formation process, different impurity content, and different crystal structures.
Many minerals comprise solid solutions, and a rock may contain more than one distinct composition of those minerals. In practice, distinction of different compositions of clinopyroxene, amphibole, garnet, olivine, and plagioclase by EBSD alone is impossible using current, commercially available indexing routines.
Some rocks are magnetic because of the presence of iron or iron-bearing minerals. The higher the concentration of magnetite (the main magnetic mineral), the stronger the magnetic properties of the …
Although nucleation of magnetite and/or hematite along dislocations upon oxidation of olivine has been observed by many workers, the effect of oxidation on the magnetic properties of the sample ...
Although nucleation of magnetite and/or hematite along dislocations upon oxidation of olivine has been observed by many workers, the effect of oxidation on the magnetic properties of the sample with specific mineralogical alterations has not been studied. Therefore, we investigate this problem using a set of time series 1 bar oxidation …
Magnesium hydroxide is a sustainable material for CO2 sequestration, according to an acid digestion and electrolysis method using olivine-rich silicate rocks in a fully recoverable system.
Scrape off olivine and petroleum jelly and place in beaker with solution of dish soap and hot water. Use ultra sonic tank to speed the dissolution process. Rinse well. Fill 250ml separatory funnel with 125ml lithium metatungstate (LST) at density >3.0. Density greater than 3 can be achieved by adding small amounts of tungsten carbide powder to ...
Semantic Scholar extracted view of "Structure and Magnetic Properties of Cu-Doped LiFePO4 Olivine-Type Material Prepared by Sol–Gel" by Q. Lin et al.
Due to the well-defined magnetic anisotropy which is related to the crystallographic lattice of olivine, AMS is a proxy for rock texture in olivine-dominated rocks.
Understanding crust–atmosphere interactions on Venus is fundamentally important to interpretations of Venus' surface spectroscopic data. Olivine, in basaltic crust, is oxidized under a heated CO2 atmosphere. However, the oxidation rates, product assemblages and spectral characteristics of olivine samples with different Fa# values …
Serpentinization is a common process in marine environments and is of both environmental and societal relevance. In abyssal peridotites, olivine is replaced by lizardite or chrysotile, which might be intergrown with brucite. Magnetite and hydrogen are important by-products of serpentinization.
Monitoring magnetite formation during serpentinization experiments can provide new constraints on the serpentinization process and, in particular, on its kinetics. We have developed a high-sensitivity magnetic method to precisely monitor (1) the formation of magnetite and, indirectly, (2) the serpentinization rate of olivine.
Olivine is the name of a group of rock-forming minerals that are typically found in mafic and ultramafic igneous rocks such as basalt, gabbro, dunite, diabase, and peridotite. They are usually green in color and have compositions that typically range between Mg 2 SiO 4 and Fe 2 SiO 4. Many people are familiar with olivine because it is the mineral of a very …
Comparative magnetic and X-ray/neutron powder diffraction investigations of the two solid−solution lines were performed as a function of Mn content to increase understanding of the electrochemical activity loss of Mn 3+ /Mn 2+ in the Li x (Mn y Fe 1-y )PO 4 electrode system.
Recharge caused partial dissolution and renewed growth of Fo 90 olivine and resulted in the formation of identical overgrowths on a variety of olivine cores.
Description. Handbook of Flotation Reagents: Chemistry, Theory and Practice is a condensed form of the fundamental knowledge of chemical reagents commonly used in flotation and is addressed to the researchers and …
These compounds are isostructural with olivine, a series of minerals commonly found in the terrestrial crust. The olivine structure possesses a distinctive magnetic lattice in which metal ions sit at the vertices of corner-sharing triangles, forming alternating sawtooth chains.
Cu-doped LiFePO 4 nanopowder was prepared by the sol–gel and heat treatment method. This nanopowder is used in the cathode materials of lithium ion batteries. All the samples had an orthorhombic (olivine) structure, regardless of the doping proportion of Cu 2+ ions in samples. This indicates that the crystal structure of LiFePO 4 basically ...
Enhanced weathering of (ultra)basic silicate rocks such as olivine-rich dunite has been proposed as a large-scale climate engineering approach. When implemented in coastal environments, olivine weathering is expected to increase seawater alkalinity, thus resulting in additional CO2 uptake from the atmosphere. However, the mechanisms of …
The magnetic structure and spin dynamics of LiFePO 4 obtained by single-crystal neutron scattering have been reported [9]. The magnetic structures of LiFePO 4 and its delithiated form FePO 4 (triphylite, olivine group) have been solved using neutron diffraction on polycrystalline samples [10].
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