After 1924, he and William McGavock fabricated a laboratory for the refining of mesothorium ( from monazite ore ) and radium ( from discarded watch dials ).
2.
In this scheme, 223 Ra was named actinium X ( AcX ), 224 Ra thorium X ( ThX ), 226 Ra radium ( Ra ), and 228 Ra mesothorium 1 ( MsTh 1 ).
3.
In 2000, 15 years after uranium mining activities had ceased in Caldas, radioactive residues of torta 2 and mesothorium from decommissioned plants in S�o Paulo were to be transported to Caldas, where they would be stored.
4.
Additionally, radioactive residues remain in the unit approximately 11, 000 tons of torta 2, a combination of uranium concentrate and thorium, and thousands of tons of mesothorium making Caldas the country s biggest radioactive waste deposit.
मोबाइल