URANOTHORITE DISCOVERED IN RARE EARTH, NIOBIUM, IRON DEPOSITS AT BAYAN OBO, INNER MONGOLIA, CHINA

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<正> In the course of study of the constitution of the rare earth, niobium, iron ore at Bayan Obo (白云鄂博), Inner Mongolia, we discovered a mineral in sandgrain form. It is identified as uranothorite after mineral separation, determination of physical
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