Manganese aluminium

After adjusting to 2 mol 1 1 in hydrochloric acid, 500 ml of the sample is adsorbed on a column of Dowex 1-XS resin (Cl form) and elution is then effected with 2 M nitric acid. The solution is evaporated to dryness after adding 1M hydrochloric acid, and the tin is again adsorbed on the same column. Tin is eluted with 2 M nitric acid, and determined in the eluate by the spectrophotometric catechol violet method. There is no interference from 0.1 mg of aluminium, manganese, nickel, copper, zinc, arsenic, cadmium, bismuth, or uranium any titanium, zirconium, or antimony are removed by ion exchange. Filtration of the sample through a Millipore filter does not affect the results, which are in agreement with those obtained by neutron activation analysis. 

In a famous paper by Shechtman et al. (1984) electron diffraction patterns were shown of rapidly quenched and solidified aluminium-manganese alloys. Sharp diffraction peaks, suggesting long-range translational order, were observed with the presence however of five-fold symmetry (that is of a non-crystallographic symmetry see 3.6.1.1). By different orientation of the specimen five-fold axes (in 6 directions), three-fold axes (in 10 directions) and two-fold axes (in 15 directions) were identified with the subsequent observation of the existence also of an inver-sion centre the assignment of this phase to the icosahedral point group, m36, was defined. 

In addition to the soluble chemical species and possible solid phase species described in the previous sections no discussion on speciation can be complete without the consideration of surface species. These include the inorganic and organic ions adsorbed on the surface of particles. Natural systems such as soils, sediments and waters abound with colloids such as the hydrous oxides of iron, aluminium, manganese and silicon which have the potential to form surface complexes with the various cationic and anionic dissolved species (Evans, 1989). 

The mechanically dressed ore is first roasted in order to remove sulphur, arsenic, and other volatile ingredients, and then heated in a reverberatory furnace with sodium carbonate or sodium sulphate. The product is extracted with %varm dilute sulphuric acid, whereupon the uranium passes into solution, whilst the radium remains in the residue witlr calcium, barium, and lead. Tliis residue, which is the starting material for tlie extraction of radium, also contains silica and small quantities of copper, bismutli, arsenic, antimony, iron, aluminium, manganese, zinc, nickel, cobalt, thallium, vanadium, columbium, tantalum, and rare earths. 

The Arsenazo III method has been utilized for determining Sc in minerals [51]. Scandium in mixtures with rare earth elements was determined by derivative spectrophotometry with the use of Chlorophosphonazo-p-Cl [27]. p-Acetyl-chlorophosphonazo with Ce(III) has been used for determining Sc in copper, aluminium, manganese, and magnesium alloys [28]. Traces of scandium in silicate rocks and sediments were determined with the use of Bromopyrogallol Red [43]. 

Besides these there are the autimonates of strontium, calcium, aluminium, manganese, iron, nickel, cobalt, and tin. 

Nickel-aluminium bronze Nickel-aluminium-manganese bronze Manganese bronze Zinc... 

Because of choking of the nozzle due to the disturbance of the flux cover on the molten metal, this material is not normally used in hot metal machines. Alloys are available with a very low manganese content which minimises the formation of the aluminium-manganese precipitation which causes the sludge to form. This material is, however, used satisfactorily with the cold-chamber machines, where it is poured at about 680 C. 

Others note that spruces, firs, and beeches, etc. have developed physiologically adaptable mechanisms which allow them to survive on acid soils and on soils with leachates containing high concentrations of aluminium, manganese and other heavy metals. Such adaptable mechanisms are well known. 

Aluminium-Manganese. The Al-rich part of this system includes the intermetallic phases AUMn (above 710 C) and AleMn (Fig. 3.1-17). The a-Al solid solution and the Al6Mn phase form a eutectic (Fig. 3.1-17). The solubility of Mn in Al at room tenperature is negligibly small. In hypereutectic Al—Mn alloys, pre-... 

Wong P.C.L. and Lim L. (1981) The effects of aluminium manganese and cadmium chloride on the methylation of phospholipids in the rat brain synaptosomal membrane. Biochem. Phamacol. 30, 1704-1705. 

Wong P.C.L. Lai J.C.K. Lim L. and Davison A.N. (1981) Selective inhibition of L-glutamate and gammaaminobutyrate transport in nerve ending particles by aluminium manganese and cadmium chloride. J. Inorg. Biochem. 14, 253-260. 

Ponce, J., Rehspringer, J.-L., Poillerat, G. and Gautier, J.L. Electrochemical study of nickel-aluminium-manganese spinel NijAli xMn204. Electrocatalytic properties for the oxygen evolution reaction and oxygen reduction reaction in alkaline media , Electrochim. Acta, 46 (2001) 3373-3380. 

Kre] Krendelsberger, N., Constitution of the Systems Aluminium-Manganese-Silicon, Aluminium-Iron-SiUcon, und Aluminium-Iron-Manganese-Silicon , Thesis, Inst, of Physical Chemistry, University of Vienna, 2001 (Crys. Stractuie, Phase Diagram, Experimental,, , 83)... 

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