Introduction: Type B Ca-Al-rich Inclusions (CAIs) from Allende reflect a variety of processes including crys-tallization from a liquid and subsolidus diffusion, oxidation , sulfidization, and alteration of igneous phases [1]. Allende TS 34 has atypically large spinel grains making this CAI an attractive candidate for investigating the effects of different processes on this phase [2-5] and, ther...

A novel cobalt-free Cu1.2Mn1.8O4 spinel coating is prepared and evaluated for the metal interconnect of solid oxide fuel cell. Mn-35Cu and Co-35Mn alloy coatings are deposited on 430 SS substrate and then in-situ oxidized in air at 750 ◦C for 100 h. XRD results confirm that Cu1.2Mn1.8O4 spinel with some Mn2O3 is formed, and the average thickness of the coating is 70–80 μm according to cross sec...

The LiMn1.5Ni0.5O4 spinel is an important lithium ion battery cathode material that has continued to receive major research attention because of its high operating voltage (∼4.8 V). This study interrogates the impact of microwave irradiation on the Mn(3+) concentration and electrochemistry of the LiMn1.5Ni0.5O4 spinel. It is shown that microwave is capable of tuning the Mn(3+) content of the sp...

Archaean komatiites of the greenstone belt in Manica area, western Mozambique contains accessory amount of disseminated chromite grains. The komatiite rocks comprise peridotitic and basaltic komtiite. These komatiites are affected by regional metamorphism as all of the studied area. It is observed that only chromian spinel is preserved as the primary mineral and that all the other primary miner...

The study showed that the interaction of product centrifugal thermal activation gibbsite with an aqueous solution magnesium nitrate at a cationic ratio Mg:Al = 1:2 leads to formation mixed double hydroxides both under hydrothermal treatment 150 °C and room temperature. subsequent 550 mild ~90% alumina-magnesia spinel ~10% MgO, while ~100% stoichiometric composition MgAl2O4. obtained samples pos...

present success was attained by making various technical developments, such as a liquid-solid hybrid system and indium bond between sample and buffer-rod. Analytical procedures were also developed both in required corrections for apparent travel times, and in formulation of pressure effect on elasticity. A distinct shear softening was found in MgAl2O4, and was predicted to occur in MgO beyond 3...

It has been suggested that ice cores may preserve detectable enhancements of some terrestrially rare radioisotopes, Be, Al, Cl, resulting from a near-Earth core-collapse supernova(SN) [1]. Both Be and Cl are also produced by atmospheric cosmic ray spallation and hence are influenced by processes that modulate the Earth’s cosmic ray flux. Previous studies [2], [3] have suggested that enhancement...

[1] Analysis of high resolution Moon Mineralogy Mapper (M) data reveals the presence of a prominent Mg‐spinel‐rich lithology in the central peaks of Theophilus crater on the lunar nearside. Other peak‐associated lithologies are comprised of plagioclase, olivine, and pyroxene‐bearingmaterials. A consistent spatial association of Mg‐spinel with mafic‐free anorthosite is recognized. Documentation ...

The high voltage spinel LiNi0.5Mn1.5O4 is a promising cathode material in next generation of lithium ion batteries. In this study, LiNi0.5Mn1.5O4 with various particle microstructures are prepared by controlling the microstructures of precursors. LiNi0.5Mn1.5O4 spinel samples with solid, hollow and hierarchical microstructures are prepared with solid MnCO3, hollow MnO2 and hierarchical Mn2O3 as...