Electron Spectroscopy for Chemical Analysis Examination of Rare Earth and Near Rare Earth Species

2009 ◽  
pp. 83-83-22 ◽  
Author(s):  
TL Barr
Keyword(s):  
Rare Earth ◽  
Chemical Analysis ◽  
Electron Spectroscopy

scholarly journals Geochemical Assessment and Mobility of Undesired Elements in the Sludge of the Phosphate Industry of Gafsa-Metlaoui Basin, (Southern Tunisia)

2021 ◽  
Vol 11 (3) ◽  
pp. 1075
Author(s):  
Olfa Smida ◽  
Radhia Souissi ◽  
Marzougui Salem ◽  
Fouad Souissi
Keyword(s):  
Rare Earth ◽  
Water Resources ◽  
Chemical Analysis ◽  
Leaching Tests ◽  
Mineralogical Analysis ◽  
P2o5 Content ◽  
Phosphate Industry ◽  
Carbonate Fluorapatite ◽  
Enrichment Process ◽  
Geochemical Assessment

The raw phosphates in the Gafsa-Metlaoui phosphate basin are valorized by wet processes that are performed in the laundries of the Gafsa Phosphates Company (CPG, Gafsa, Tunisia) to reach market grades (>28% P2O5). This enrichment process allows the increase of P2O5 content by the elimination of the coarse (>2 mm) and fine (<71 µm) fractions. Mineralogical analysis has shown that all the investigated materials (raw phosphate, marketable phosphate, coarse waste, and fine waste) from the laundries of M’Dhilla-Zone L and Redeyef are both composed of carbonate fluorapatite, carbonates, quartz, gypsum, clays, and clinoptilolite. Chemical analysis shows that Cr, Cd, Zn, Pb, and U are concentrated in the fine wastes and associated with the clay–phosphate fraction. The rare earth elements are more concentrated in both raw and marketable phosphates. Drilling and sludge-water analysis, along with leaching tests conducted on the fine wastes, showed that, due to phosphate industry, cadmium, fluorine, and sulfate contributing to the pollution of water resources in the region, pollution is more conspicuous at M’Dhilla.

Internal oxidation in solid solutions Bi2.1-xPbxSr2-yCa1-zRy+zCu2O8+d (R = Y, Nd or La).

2004 ◽  
Vol 848 ◽  
Author(s):  
A.V. Garshev ◽  
A.V. Knotko ◽  
M.N. Pulkin ◽  
D.I. Kirdyankin ◽  
A.V. Geyer ◽  
...  
Keyword(s):  
Rare Earth ◽  
Chemical Analysis ◽  
Rare Earth Element ◽  
Internal Oxidation ◽  
Solid Solutions ◽  
Oxidation Kinetics ◽  
Earth Element ◽  
Isothermal Condition ◽  
Element Content ◽  
Rare Earth Element Content

ABSTRACTBi2-xPbxSr2CaCu2O8+d solid solutions with substitution of Sr or Ca by Y, Nd or La were fabricated at 760 - 79°C in N2-flow. The as-synthesized solutions were oxidized in air under isothermal condition and tested with XRD, TGA chemical analysis, TEM, XANES. Effect of rare-earth element content on oxidation kinetics and microstructure of the product is discussed.

Empirical atomic sensitivity factors for quantitative analysis by electron spectroscopy for chemical analysis

1981 ◽  
Vol 3 (5) ◽  
pp. 211-225 ◽  
Author(s):  
C. D. Wagner ◽  
L. E. Davis ◽  
M. V. Zeller ◽  
J. A. Taylor ◽  
R. H. Raymond ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Chemical Analysis ◽  
Electron Spectroscopy ◽  
Sensitivity Factors

scholarly journals Electron spectroscopy for chemical analysis studies on polypeptide surfaces.

1988 ◽  
Vol 45 (5) ◽  
pp. 441-447 ◽  
Author(s):  
Kohei KUGO ◽  
Tatsuro KITAURA ◽  
Jun NISHINO
Keyword(s):  
Chemical Analysis ◽  
Electron Spectroscopy

Thermodynamic Analysis and Observation of Inclusions in Ferritic Stainless Steel with Rare Earth

2013 ◽  
Vol 662 ◽  
pp. 441-444
Author(s):  
Xiao Liu ◽  
Jing Long Liang
Keyword(s):  
Stainless Steel ◽  
Rare Earth ◽  
Ferritic Stainless Steel ◽  
Thermodynamic Analysis ◽  
Electron Spectroscopy ◽  
Thermodynamic Calculation ◽  
Metallographic Examination

The effect of RE on modifying inclusions of 430 ferrite stainless steel was studied by metallographic examination, SEM and electron spectroscopy. Thermodynamic calculation was used to analyze the formation of RE inclusions in 430 ferrite stainless steel. The result shows that sulfide and other irregular inclusions are modified to round or oval-shaped RE2O2S and RES.

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