bario 149
barium . ( In barite by have been extracted from this ore). 1. m. chemical element of no. atóm. 56 Metal abundant in the Earth's crust is found in minerals such as the barite and the barytes. It is colored yellowish white, soft, heavy, especially reactive and oxidizes quickly. It is used for degassing vacuum tubes, and some of its derivatives in shielding walls against radiation and as a means of contrast in Radiology. (Símb.) Ba ).