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Pair distribution function analysis of simulated nuclear waste glass

Yoneda, Yasuhiro   ; Tsuji, Takuya  ; Matsumura, Daiju   ; Okamoto, Yoshihiro  ; Nagai, Takayuki  

In order to establish vitrification technology, it is important to clarify how various substances dispersed in glass exist. We made simulated glass by mixing various substances containing metallic element of the platinum group with raw material glass containing SiO$$_2$$-B$$_2$$O$$_3$$ glass as the main component. This simulated glass was heated to 600$$^{circ}$$C just above the melting point and observed by an X-ray diffraction experiment. The obtained X-ray diffraction profile revealed the local structure using the pair distribution function (PDF). Since the network structure of SiO$$_2$$ is strong, it is considered that the precipitated fine particles become wedges and the Si-O bond length is modulated.

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