高放废物中稀土-锕系元素部分的基质中的钙钛锆矿多型体和村田矿多聚体

Zirconolite Polytypes and Murataite Polysomes in Matrices for the REE-Actinide Fraction of HLW.

作者信息

Yudintsev Sergey V, Nickolsky Maximilian S, Ojovan Michael I, Stefanovsky Olga I, Nikonov Boris S, Ulanova Amina S

机构信息

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS), 119017 Moscow, Russia.

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences (IPCE RAS), 119071 Moscow, Russia.

出版信息

Materials (Basel). 2022 Sep 2;15(17):6091. doi: 10.3390/ma15176091.

DOI:10.3390/ma15176091

PMID:36079472

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9458050/

Abstract

Electron backscatter diffraction (EBSD) has been used for more than 30 years for analyzing the structure of minerals and artificial substances. In recent times, EBSD has been widely applied for investigation of irradiated nuclear fuel and matrices for the immobilization of radioactive waste. The combination of EBSD and scanning electron microscopy (SEM/EDS) methods allows researchers to obtain simultaneously data on a specimen's local composition and structure. The article discusses the abilities of SEM/EDS and EBSD techniques to identify zirconolite polytype modifications and members of the polysomatic murataite-pyrochlore series in polyphase ceramic matrices, with simulations of Pu (Th) and the REE-actinide fraction (Nd) of high-level radioactive waste.

摘要

电子背散射衍射（EBSD）用于分析矿物和人工物质的结构已有30多年历史。近年来，EBSD已广泛应用于辐照核燃料和放射性废物固化基体的研究。EBSD与扫描电子显微镜（SEM/EDS）方法相结合，使研究人员能够同时获取样品局部成分和结构的数据。本文讨论了SEM/EDS和EBSD技术在多相陶瓷基体中识别锆石多型变体以及多体磷硅钛铈矿-烧绿石系列成员的能力，并对高放废物中的钚（钍）和稀土-锕系元素部分（钕）进行了模拟。