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Isomorphic Capacity of Synthetic Sphene With Respect to Gd and U

Published online by Cambridge University Press:  10 February 2011

S.V. Stefanovsky ,
S.V. Yudintsev ,
B.S. Nikonov ,
B.I. Omelianenko  and
M.I. Lapina
S.V. Stefanovsky
Affiliation:
SIA Radon, 7th Rostovskii per. 2/14, Moscow 119121RUSSIA
S.V. Yudintsev
Affiliation:
Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry RAS, Staromonetnii per. 35, Moscow 109017RUSSIA
B.S. Nikonov
Affiliation:
Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry RAS, Staromonetnii per. 35, Moscow 109017RUSSIA
B.I. Omelianenko
Affiliation:
Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry RAS, Staromonetnii per. 35, Moscow 109017RUSSIA
M.I. Lapina
Affiliation:
Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry RAS, Staromonetnii per. 35, Moscow 109017RUSSIA
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Abstract

Phase relations in the system: CaO-TiO2-SiO2-(Na2O,Al2O3,Gd2O3,UO2) were studied. This system is of interest due to the formation of sphene, perovskite,. and other phases potentially suitable for immobilization of high level waste (HLW) elements. Along with sphene, other phases found in the samples were ru-tile, chevkinite, anorthite, crystobalite, and pyrochlore-structured phases. Sphene is able to incorporate up to 21.5 wt.% Gd2O3 and 9.3 wt.% UO2 or, in formula units: 0.25 Gd3+and 0.07 U4+

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 608: Symposium QQ – Scientific Basis for Nuclear Waste Management XXIII , 1999 , 455
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

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