As a result, the company officially opened the mine on 27 March 2013 while simultaneously handing over new houses to 246 families who were relocated from Segorong to Praktiseer and Pidima, also in Burgersfort. The opening of the mine and the completion of the houses has been a long and arduous 12-year journey but finally both the community of Segorong and Imerys South Africa have a good reason to celebrate, says Imerys CEO and chairperson Gilles Michel.
Polonium is a radioactive element discovered in 1898 by scientists Marie and Pierre Curie and named for Marieâs native country, Poland. One of the Earthâs rarest elements, itâs an odorless, silvery-gray soft metal that can be ground into powder.
It has 33 isotopes, all of which are radioactive. Polonium 210 is a radioactive element with a half life of approximately 138.39 days. It occurs naturally and is widely distributed in small amounts in the earth's crust. Polonium's most stable isotope is Polonium 209 with a half life of 102 years.olonium Properties. Polonium is a Block P, Group 16, Period 6 element. The number of electrons in each of polonium's shells is 2, 8, 18, 32, 18, 6 and its electron configuration is [Xe]6s 2 4f 14 5d 10 6p 4 uranium source.