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What is the structure of ilmenite sand? how is the atoms (fe2+,ti4+,o ) is arranged in ilmenite?
what is the structure of ilmenite sand? how is the atoms (fe2+,Ti4+,O ) is arranged in ilmenite?
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Dinesh khalmaniya 1
hope this will help you 🙏🙏
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Dinesh khalmaniya 1
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L AND STICKSTICKSPACEFILLPOLYHEDRALRESET Ilmenite Ilmenite is an iron-oxide mineral of the oxide and hydroxide group with structural formula (Fe,Ti)2O3. The structure is similar to that of hematite, where the two Fe3+ in hematite are replaced by one Fe2+ and one Ti4+ in ilmenite. It consists essentially of a dense arrangement of Fe2+ and Ti4+ ions in octahedral coordination with oxygens in hexagonal closest-packing. The structure may also be seen as the stacking of alternating sheets of octahedrally coordinated Fe2+ and Ti4+ in hexagonal closest packing with oxygen. Since Fe2+ and Ti4+ account for a total valency of +6, only two out of three available oxygen octahedral positions are occupied. This arrangement makes the structure neutral with no charge excess or deficit. Ilmenite may contain significant isomorphic substitutions of Mg2+ and Mn2+ for both Fe2+, and probably forms solid solutions with both geikielite (Mg,Ti)2O3 and pyrophanite (Mn,Ti)2O3 end-members. Ilmenite commonly shows intergrowth with hematite and magnetite. The crystals are totally opaque and appear as thick tabular crystals or anhedral masses embedded in igneous and metamorphic rocks, or as opaque shapeless sand-size grains. Ilmenite is a weakly magnetic mineral. The color is commonly iron-black, brownish-black, with metallic to sub-metallic luster. The name “ilmenite” is from the Ilmen Mountains in Russia.
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can u pls explain ,how the oxygen forms hexagonal closest pacaking
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how the valency become +6
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Fe= +2 and Ti= +4 so total valency = 6
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it's practically found that Oxygen forms HCP
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Amol ashok pawar![best-answer]()
formula FeTiO3 in ilmenite Fe2+ and Ti4+ ions occupy alternating layers perpendicular to the trigonal c axis.