21. The American government wanted exclusivity on the Shinkolobwe uranium ore , but Sengier initially refused. 22. In Joachimsthal uranium ore , radium and polonium was discovered by Marie Curie in 1898. 23. This site will process uranium ore into gas, which will be enriched at Natanz. 24. In 1944, the Americans acquired a further of Uranium ore from the newly reopened mine. 25. It will convert uranium ore into gas that will be taken to Natanz for enrichment. 26. Gamma-ray energy spectrum of uranium ore ( inset ). 27. Until the creation of nuclear reactors, all polonium had to be extracted from uranium ore . 28. Several oil and gas companies developed uranium ore mines in New Mexico during that period. 29. Marie Curie began her investigations by testing a uranium ore called pitchblende with an electrometer. 30. Boardman had enclosed an egg-size rock containing uranium ore .
