Key;
Laboratory;
of;
Mineral;
Deposits;
Research,;
School;
of;
Earth;
Sciences;
and;
Engineering,;
Nanjing;
University,;
Nanjing;
210023,;
China;
Resources;
Company;
Limited,;
China;
Guangdong;
Nuclear;
Power;
Corporation,;
Beijing;
100029,;
China;