Rare-earth substitution effect on the quality of Mg–Ti ferrite

2007 ◽  
Vol 33 (3) ◽  
pp. 413-418 ◽  
Author(s):  
M.M. El Sayed
Keyword(s):  
Rare Earth ◽  
Substitution Effect ◽  
Rare Earth Substitution

Vitusite — an apatite derivative structure

1992 ◽  
Vol 56 (383) ◽  
pp. 235-239 ◽  
Author(s):  
Adrian A. Finch ◽  
James G. Fletcher
Keyword(s):  
Rare Earth ◽  
Late Stage ◽  
Sensu Stricto ◽  
Hydrothermal Fluids ◽  
Stable Phase ◽  
Synthetic Analogue ◽  
Apatite Structure ◽  
Phosphate Mineral ◽  
Rare Earth Phosphate ◽  
Rare Earth Substitution

AbstractThe uncommon sodium rare-earth phosphate mineral vitusite-(Ce) (Na3RE(PO4)2) can be considered as the extreme product of sodium and rare-earth substitution in the apatite structure. Lesser amounts of substitution provide sodium and rare-earth-bearing apatites up to about 80 mol.% exchange; beyond this point vitusite is the stable phase. The structure of vitusite, determined previously from a synthetic analogue, can also be considered as a derivative from apatite, but with cations exchanged on sites normally occupied by anions. Vitusite can therefore be considered as a sodium- and rare-earthrich apatite end-member, with a distinct, but apatite-derived, structure, formed in highly persodic and high rare-earth environments. From an examination of the literature on diffusion in apatite, vitusite in principle could be formed from apatitesensu strictoby subsolidus diffusion in response to late-stage NaandRE-rich hydrothermal fluids.

Rare‐earth substitution in (BiYCa)3(FeSiGe)5O12bubble films

1987 ◽  
Vol 61 (1) ◽  
pp. 325-327 ◽  
Author(s):  
L. C. Luther ◽  
S. E. G. Slusky ◽  
C. D. Brandle ◽  
M. P. Norelli
Keyword(s):  
Rare Earth ◽  
Rare Earth Substitution

The effect of rare earth oxides on the quality of a glaze coating

1972 ◽  
Vol 29 (7) ◽  
pp. 475-477
Author(s):  
G. A. Binkou ◽  
V. V. Balandina ◽  
A. S. Migonadzhiev ◽  
D. A. Romanyuk
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxides
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