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Spinel, chrome

Technogenic phases, such as various Fe-alloys ((Cr,Ni)-ferroalloy, (Cu,Ni)-alloy, and (Fe, Si)-alloy), Fe-oxides ((Cr,V,Fe)-oxide, (Mo,W,V,Cr,Fe)-oxide, (Monoxide, (W,Cr,Fe)-oxide), and spherical particles ((Cr,Ni)-oxide or chrome-nickel-spinel (Fig. 3), (Cr.Fe)-oxide or chrome-spinel), were recognized in the area of the Ravne ironworks. [Pg.213]

Chromtec Platinum Chrome Spinelle Metal Finish Flexlamp... [Pg.357]

A nickel-chrome spinel, NiO.CrjOg, has been made artificially in small green crystals. The green colour of emerald, serpentine, possibly sapphire, and other minerals is due to the presence of compounds of chromium, which also occur in rubies, corundums, and spinels. It has been shown that the peculiar spectra of ruby and diamond are due to chromium oxide which has been compelled to vibrate in an abnormal manner, leading to the production of narrow absorption bands. Traces of chromium have been detected in the soot produced by the combustion of coal obtained from deposits at Li ge. Compounds of chromium are not known to play any part in the economy of plants or animals. [Pg.8]

The experimental results obtained at the QFM buffer are listed in Table II. and type formulas for the various mineral series in Table III. Olivine and chrome spinel are the only crystalline phases which occur between 1240°C and 1179°C clinopyroxene and... [Pg.226]

E. Mallard and J. J. Ebelmen melted together beryllium and chromic oxides in the presence of boric oxide, and obtained a dark green powder consisting of crystals of beryllium chromite, Be(Cr02)2. The crystals resemble alexandrite. The so-called chrome spinel, (Mg,Fe)0.(Al,Cr)208, from Lherz was called IherzoUte by... [Pg.78]

Chrome Ore. An ore consisting primarily of chrome spinels, (Fe, Mg)0. (Cr, Fe, A1)203 it occurs in ultrabasic igneous rocks and in rocks derived from them by alteration, e.g. serpentines. The chief sources are in S. Africa, Rhodesia, Turkey and Russia there are other important deposits in Yugoslavia, Greece, India, Philippines and Cuba. [Pg.61]

Chrome Spinel. A spinel (q.v.) in which the trivalent metal is Cr. [Pg.61]

The new metal chromium was discovered in 1797. Before the end of the century two discoveries of lead-free chromium minerals were made. These minerals are known today as chromite, FeCr O, that is FeO Cr Oj. Chromite is in reality a chrome spinel with the general formula ([Mg, Fe ][Cr,Al,Fe ])20. In good chromium ore, of course, Fe predominates in the first square bracket and Cr in the second. [Pg.579]

Iron chrome spinels of composition CnFeo.sCri 5O4 give black pigments. Spinels are actually magnesium aluminates generally... [Pg.351]

Brick type magnesia magnesia chrome chrome spinel... [Pg.144]

Chrome Ore. Chromia-beating spinel materials, although considered neutral, are generally used in combination with basic magnesite. Chrome ores consist essentially of a complex soHd-solution series of spinels including hercynite, FeO 202 ferrous chromite, FeO Cr20 magnesioferrite,... [Pg.26]

Chrome alumina pink spinel, formula and DCMA number, 7 348t Chrome Antimony Titanate Buff, pigment for plastics, 7 369t Chrome brick, 6 495 Chrome dyes, 9 468 26 396 Chrome green, 6 554 color, 7 331... [Pg.181]

Fourcroy predicted that this mineral would give chemists the opportunity to make a more thorough study of the properties of chromium and perhaps to discover compounds of it which, because of their rich and varied colors, would be useful in painting and in the manufacture of glass and enamel (90). He also encouraged study of the chromium alloys. The chrome-iron ore is now known as chromite. It is not a chromate, but has the spinel composition, Fe(Cr02)2-... [Pg.279]

MgO-spinel clinker is obtained by the same procedure, but with a substantial proportion of free MgO (75-85%). MgO-spinel is produced by sintering at temperatures of 1600-1800°C and a dense product is obtained. MgO-spinel refractory has better high temperature mechanical properties in arc furnace roof application compared to magnesia-chrome refractories, but it has lower strength than a high-alumina refractory. [Pg.363]

Reyes Sanchez, J.A. and Toledo, O.D., New developments of magnesite-chrome brick and magnesite-spinel for cement rotary kilns higher thermal shock resistance and higher coating adherence , UNITECR 89, 1989. [Pg.394]

See other pages where Spinel, chrome is mentioned: [Pg.36]    [Pg.101]    [Pg.361]    [Pg.1201]    [Pg.1686]    [Pg.227]    [Pg.503]    [Pg.45]    [Pg.61]    [Pg.379]    [Pg.612]    [Pg.238]    [Pg.370]    [Pg.36]    [Pg.101]    [Pg.361]    [Pg.1201]    [Pg.1686]    [Pg.227]    [Pg.503]    [Pg.45]    [Pg.61]    [Pg.379]    [Pg.612]    [Pg.238]    [Pg.370]    [Pg.208]    [Pg.24]    [Pg.26]    [Pg.29]    [Pg.37]    [Pg.428]    [Pg.430]    [Pg.24]    [Pg.26]    [Pg.26]    [Pg.29]    [Pg.37]    [Pg.208]    [Pg.1017]    [Pg.100]    [Pg.151]    [Pg.359]    [Pg.360]    [Pg.367]    [Pg.368]    [Pg.368]    [Pg.391]   
See also in sourсe #XX -- [ Pg.579 ]



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Chrome

Spinels

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