Radiation Effects in Murataite Ceramics
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J. Lian,1 L. M. Wang,1 R. C. Ewing,1 S. V. Yudintsev,2 S. V. Stefanovsky3 1
Dept. of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA; 2 Institute of Geology of Ore Deposits RAS, Staromonetnii per. 35, Moscow 109017 RUSSIA; 3 SIA Radon, 7th Rostovskii per. 2/14, Moscow 119121 RUSSIA
$%675$&7 Synthetic murataite, an isometric, derivative of the fluorite-structure, has been proposed as a potential host phase for the immobilization of rare earth elements (REE) and actinides. A 1 MeV Kr+ ion irradiation has been performed on synthetic murataite ceramics in the system CaTi-U-Mn-Al-Zr-Ce-O for different structural multiples of the fluorite unit cell. The temperature dependence of the amorphization dose has been determined. A higher critical temperature was obtained for the disordered murataite as compared to that of murataite superstructures, suggesting that murataite becomes more “resistant” to ion beam-induced damage with increasing degrees of structural disorder. ,1752'8&7,21
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Natural murataite ( ) 4 3P , D = 14.89 Å, Z = 4), is a complex oxide of rare earths, Ti and )HDQGKDVDJHQHUDOFKHPLFDOIRUPXOD 6B12 4 40-x
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