نتایج جستجو برای: ilmenite
تعداد نتایج: 854 فیلتر نتایج به سال:
The world is moving at a fast pace in the consumption of non-renewable natural resources, causing several ecological problems. search for cost reduction by implementing renewable energies implies optimization manufacturing processes parameters consolidated technologies, such as solar thermal energy collectors. One applications selective surfaces to improve performance absorbers. purpose this wo...
Pseudorutile and kleberite are intermediate minerals formed during alteration of ilmenite to rutile. They difficult identify, as both have a range chemical composition occur small crystals commonly mixed with other minerals. Reference samples large pseudorutile kleberite, published X-ray diffraction analyses, were analysed establish characteristic Raman spectra. produced goethite-like spectrum ...
We have studied the Ilmenite, Perovskite and LiNbO3 type crystal structures of ternary oxide MgSnO3 by first-principles methods using density functional theory (DFT) beyond. conclude that in is both mechanically dynamically stable, whereas Ilmenite are stable but unstable. Vibrational stability warrants some distortion octahedra caused due to strength bonding between atom pairs Sn–O structure. ...
[1] The Mössbauer spectrometer on Spirit measured the oxidation state of Fe, identified Fe-bearing phases, and measured relative abundances of Fe among those phases for surface materials on the plains and in the Columbia Hills of Gusev crater. Eight Fe-bearing phases were identified: olivine, pyroxene, ilmenite, magnetite, nanophase ferric oxide (npOx), hematite, goethite, and a Fe-sulfate. Adi...
Biomass conversion with carbon capture and storage (Bio-Energy CCS; BECCS) is one of the options considered for mitigating climate change. In this paper, technology chemical-looping combustion (CLC) examined in which CO2 produced a stream separate from air. A central research topic CLC oxygen carriers; solid metal oxides that provide process. waste-derived fuels contain reactive ash compounds, ...
Abstract The foliated low-grade metamorphic rocks of the Triassic Bagolyhegy Metarhyolite Formation, mainly pyroclastic origin, host post-metamorphic quartz-albite veins containing abundant tourmaline and occasionally rutile/ilmenite. study Ti-oxide-mineralized with SEM-EDX revealed an unusual mineral assemblage comprising fine-grained Nb–Ta-bearing oxides (columbite-tantalite series, fluorcalc...
World-class titanium and titanium-zirconium placer deposits are located on the territory of Ukraine. They form Ukrainian sub-province province Eastern Europe. It also includes Irshansky field for development short-lived ilmenite placers. The article presents results research spatial ratio placers root sources, vertical horizontal zonation material composition 9 detailed sections. This allows us...
A new layered trigonal (P3̅1m) form of MnSb2O6, isostructural with MSb2O6 (M = Cd, Ca, Sr, Pb, and Ba) and MAs2O6 (M = Mn, Co, Ni, and Pd), was prepared by ion-exchange reaction between ilmenite-type NaSbO3 and MnSO4-KCl-KBr melt at 470 °C. It is characterized by Rietveld analysis of the X-ray diffraction pattern, electron microprobe analysis, magnetic susceptibility, specific heat, and ESR meas...
Processing of by-product heavy minerals (amang) from tin mining involves potential exposure to external and internal sources of radioactivity. The radioactivity arises through the presence of thorium and uranium series radionuclides in the various minerals. Monazite is the most radioactive mineral, containing 3% to 7% thorium by weight, while ilmenite is generally the least radioactive mineral ...
In this paper preliminary mineralogical characterization of hematite from Alinci is presented. Several crystals were collected for research. The straight-forward identification the studied mineral sam-ples was enabled by optical microscope, SEM-EDS, ICP-MS and XRPD methods. use these methods showed that they are very useful rapid analysis contributing important analytical information. With esta...
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