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                        Feldspar Minerals - 2 Chemical and Textural Properties (Paperback, Softcover reprint of the original 1st ed. 1974)
                    
                        
                            
                            
                            
                            
                                
                                
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                Feldspar Minerals - 2 Chemical and Textural Properties (Paperback, Softcover reprint of the original 1st ed. 1974)
            
            
                
            
            
            
            
            
            
                
                
                 
             
            
            
                
                    
                        
                        
                    
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                    33 14. 3. 5 REE between Plagioclase and Aqueous Fluid 0 Cullers et
al. (1973) measured the distribution of REE at 850 C and 750 bars
pressure between a natural plagioclase, An, and gaseous water. The
rare earths 65 favored the plagioclase by a factor which varies
from about 25 for Ce to 10 for Lu. Data were also obtained for
forsterite, diopside, enstatite and two rhyolite glasses, on the
one hand, and water on the other hand, thereby permitting
estimation of the partition coefficients between all pairs of
phases. 14. 4 Chemical Substitution in Natural Feldspars 14. 4. 1
Introduction It is quite impracticable to give all the data on
chemical substitution in natural feldspars: indeed many of the
details are significant only to some particular pegmatite or rock
body. As far as possible, emphasis is placed on features of general
interest to crystal chemists and to petrologists. Ironically the
well established features can be described more easily than the
uncertain ones, and unfortunately it is necessary to use valuable
space on data of dubious value. The bibliography is fairly
complete, but it was impracticable to locate all data, especially
those in obscure journals. Each reference is followed by a list of
the elements referred to in the paper, thereby permitting a reader
to compile a fairly compre hensive set of references on any chosen
element. Not all papers are mentioned in the text. The book on
Geochemistry and Mineralogy of Rare Elements, etc."
                 
                    
                
                
                    
                    
                        
                            
                            
                            
                        
	
	
		
	
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