metallic element,
metal any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
columbite,
niobite a black mineral that is an ore of niobium and tantalum
= synonym
= antonym
= relatert ord
Wiktionary
Substantiv
niobium -
A metallic chemical element symbol Nb with an atomic number of 41.
Wikipedia
Niobium, or columbium, is the chemical element with the symbol Nb and the atomic number 41. A rare, soft, grey, ductile transition metal, niobium is found in the minerals pyrochlore, the main commercial source for niobium, and columbite. Niobium has physical and chemical properties similar to those of the element tantalum, and the two are therefore difficult to distinguish.
OmegaWiki Dictionary
Ω
niobium Chemical element with symbol Nb and atomic number 41, shiny grey transition metal.
