11. Mining this rare metal has devastated the planet, poisoning its seas and fatally polluting its atmosphere. 12. They were once hypothesized to use the rare metal vanadium as an oxygen binding prosthetic group. 13. Eagle-Picher Company employed more than seven hundred people at its plant that extracted the rare metal germanium. 14. These are commonly found along with copper, gold, silver, and a large amount of other rare metals . 15. This rare metal is mined at Mt. 16. The story takes place in the future, where competition is fierce among greedy prospectors of a rare metal . 17. Titanium is a relatively rare metal useful to the defense industry because of its strength and light weight. 18. After being polished, the mirrors were coated with a vapor-thin layer of the highly reflective rare metal , iridium. 19. Another problem is the frequent theft of radioactive cables in Semipalatinsk because of their high rare metals content. 20. Chronometer makers also took advantage of the physical properties of rare metals such as gold, platinum, and palladium.
