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Radiation Damage in Natural Titanite by Crystal Structure Analysis

Published online by Cambridge University Press:  28 February 2011

M. E. Fleet  and
G. S. Henderson
M. E. Fleet
Affiliation:
Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada
G. S. Henderson
Affiliation:
Department of Geology, University of Western Ontario, London, Ontario N6A 5B7, Canada
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Abstract

Study of radiation damage in natural titanite (CaTiSiO5) permits estimation of the long-term performance of titanite-bearing glass ceramics in the immobilization of radioactive waste. Single-crystal X-ray structure analyses have been made on two geologically old, U, Th-bearing titanites (sphenes), on an undamaged gem-quality titanite and on their annealed equivalents. The alpha-damaged titanite crystal structure is characterized by a marked increase in magnitude of the apparent thermal parameters of all structural positions, reflecting a general increase in positional disorder. The ratio of observed structure factors (F0-damaged/F0-annealed) may be used to estimate the overall structural damage.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 50: Symposium STOCKHOLM – Scientific Basis for Nuclear Waste Management IX , 1985 , 363
Copyright
Copyright © Materials Research Society 1985

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