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Chromite belongs to the spinel group with the general chemical formula XY2O4, where X and Y represent divalent and trivalent metal ions, respectively. Four types of chromite ore deposits occur as either lode or secondary deposits. Lode chromite ore deposits comprise stratiform and podiform deposits, whereas secondary chromite ore deposits comprise laterite and placer …
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Elements of Mineralogy by Brian Mason and L. G. Berry. Publication date 1968 Publisher W. H. FReeman and Company Collection internetarchivebooks; inlibrary; printdisabled Contributor Internet Archive …
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• Premium quality, custom-tailored ignition sets Feature Magnum's patented Sterling Chromite braid-wires sheathed with a chrome-like braid that matches your chrome in brilliancy and wipes clean with detergent• Matches Magnum Sterling Chromite cables and hoses• High voltage/high temperature 8mm silicone ignition wires (150 ohms of resistance) with high …
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A chromite occurrence called the Sabantuy paleoplacer was discovered in the Southern Pre-Ural region, at the east edge of the East-European Platform in the transitional zone to the Ural Foredeep. A ca. 1 m-thick chromite-bearing horizon is traced at a depth of 0.7–1.5 m from the earth's surface for the area of ca. 15,000 m 2.
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Mineralogy: Concepts, descriptions determinations by L. G. Berry and Brian Mason. 612 pp., 265 illus. W. H. Freeman and Company, San Francisco and London, 1959. Price 56/- First …
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크로마이트(Chromite) - Mtoroshanga, Makonde District, Mashonaland West, 짐바브웨 크로마이트(Chromite) - Mtoroshanga, Makonde District, Mashonaland West, 짐바브웨. 크로 마이트 산화물 광물이다.철 크롬 공식: FeCr2O4의 산화물. 에 속합니다. 첨 정석 그룹. 크로마이트는 크롬의 가장 중요한 광석이다.
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In the present article, we report the comparative results obtained from the analysis of semi-precious stones of different classes (idiochromatic, allochromatic and pseudochromatic) using…
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Chromite is a common and widespread mineral that occurs in the ultramafic layers of layered igneous intrusions, as an accessory mineral in Alpine-type peridotites, as a detrital mineral, in meteorites, and in lunar basalts. Large crystals can be found in France, Sierra Leone, and New Caledonia, and economic deposits are found at the Bushveld ...
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The atomic weight of the most abundant (83.789%) chromium isotope is 51.996. A total of 26 isotopes of chromium from 42 Cr to 67 Cr are known. Among them, there are three stable isotopes: 52 Cr, 53 Cr, and 54 Cr. 53 Cr is the product of 53 Mn radiogenic decay (a half-life is 3.74 m.y.). In addition, there are 19 radioisotopes with 50 Cr being the most stable (with …
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chromite Member of the chromite group of minerals in the spinel group, Fe 2+ Cr 2 O 4, along with magnesiochromite (MgCr 2 O 4); sp. gr. 5.1; black; sub-metallic lustre; crystals cubic, but normally it is massive or a granular aggregate; occurs in basic and ultrabasic rocks. It is the primary source of chromium.
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PE Chromite = 18.28 barns/electron U=PE Chromite x rElectron Density= 83.03 barns/cc. Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chromite is Not Radioactive : Chromite Classification: Dana Class: 07.02.03.03 Multiple Oxides
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Back-scatter electron images (BSE), polished section AS10494, LG-6 concentrate, Thaba Mine, western Bushveld. a Example of tiny inclusion of laurite in chromite grain. b Magnification from ( a ...
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CarboLhermic prercduction with cheap coal has gained importance as a means of improving the cost-effectiveness of ferrochromium production. The laboratory scale study described in thjs paper was undertaken in order to investigate the influence of silica additions together with graphite and/or char on chromite reduction rates at different temperatures, At lower temperatures …
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This document provides a feasibility report for establishing a ferrochrome plant in Muslimbagh, Pakistan. It begins with an introduction to chromite ore and its various grades. It then discusses world chromite reserves, import/export statistics by country, and supply/demand drivers. Key sections analyze chromite in Pakistan, the beneficiation process, a case study of a South …
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Chromite from the LG-MG-UG show distinct, but sometimes overlapping chemistry, with MG chromites showing the most overlap with UG and UG-2E chromites Figures - uploaded by Danie Grobler Author content
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LG Berry Construction - Facebook
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Berry, L. G. (Leonard Gascoigne), 1914-; Mason, Brian Harold, 1917- joint author. Publication date 1959 Topics Mineralogy Publisher San Francisco, W.H. Freeman Collection internetarchivebooks; americana; …
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In the present study, PGE concentrates from the LG-6 and MG-1/2 chromitites of the eastern Bushveld Complex (Fig. 1a, b) were investigated using state-of-the-art and novel geochemical and mineralogical methods.The work centers on (i) revealing the distribution of the PGE in the ores (discrete PGM versus PGE bound to sulfides or chromite), (ii) unraveling the …
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chromite-spinel) and trace or minor element substitutions (such as As in pyrite or Fe in sphalerite). Maps Min Software automatically detects which sub-species of a solid-solution is present in your sample—all you have to do is add the solid-solution end members to the mineral library and link them as a solid-solution series.
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In chromite-only models, magma was perturbed into a state in which chromite was the only mineral on the liquidus, leading to an episode of deposition of pure chromitite (Irvine, 1976;Irvine, 1977 ...
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Chromite, a brownish black cubic mineral belonging to the spinel group, is the only ore mineral from which metallic chromium and chromium compounds are obtained. It has the chemical formula FeCr 2 O 4, and a theoretical composition of 32.0% FeO and 68.0% Cr 2 O 3. In its natural form it occurs in solid solution with other minerals in the spinel ...
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The occurrence of Platinum Group Metals (PGM's) in the traditional chromite seams (LG and MG seams) have always been well known throughout the industry. Rand Mines at its Henr y and Sam ...
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CarboLhermic prercduction with cheap coal has gained importance as a means of improving the cost-effectiveness of ferrochromium production. The laboratory scale study described in thjs paper was undertaken in order to investigate the influence of silica additions together with graphite and/or char on chromite reduction rates at different temperatures, At lower temperatures …
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Chromite is an oxide mineral that an iron chromium oxide with formula: FeCr2O4. It is belonging to the spinel group. Chromite is the most important ore of chromium. Crystals are uncommon, but when found they are octahedral. Chromite is usually massive or in the form of lenses and tabular bodies, or it may be disseminated as granules.
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mineralogy：。。 、。
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Chromite (Cr) occurs exclusively in mafic and ultramafic igneous rocks (Papp and Lipin, 2006).Although some Cr-based minerals such as crocoite (PbCrO 4), vauquelinite (Pb 2 Cu[CrO 4][PO 4]), uvarovite (Ca 3 Cr 2 [SiO 4] 3), and merumite (4(Cr,Al) 2 O 3 ·3H 2 O) are well known, chromite (FeCr 2 O 4) is the only one that is a commercially recoverable source of Cr (Sueker, …
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