RARE EARTH ELEMENT CONTENT AND RARE MINERALOGY IN ALKALINE ULTRAMAFIC ROCKS, WESTERN KENTUCKY FLUORSPAR DISTRICT, KENTUCKY

2016 ◽  
Author(s):  
Warren H. Anderson ◽  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Element Content ◽  
Ultramafic Rocks ◽  
Rare Earth Element Content ◽  
Western Kentucky

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.

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