from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A silvery, soft, ductile metallic element that occurs chiefly in columbite-tantalite and is used in steel alloys, arc welding, and superconductivity research. Atomic number 41; atomic weight 92.906; melting point 2,468°C; boiling point 4,927°C; specific gravity 8.57; valence 2, 3, 5. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a metallic chemical element (symbol Nb) with an atomic number of 41.
from the GNU version of the Collaborative International Dictionary of English
- n. The chemical element of atomic number 41. Chemical symbol Nb. Atomic weight 92.91. Previously called columbium. See also columbium.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol, Nb; atomic weight, 94. A metal of steel-gray color and brilliant luster.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
Mr. Hallbauer added: "With limited near-term niobium production on the horizon and demand steadily growing, an open pit mining operation at Aley has strong potential to become a key asset for Taseko."
Brazil's Companhia Brasileira de Metalurgia e Mineraçào, or CBMM as it is known, produces more than 80% of the world's supply of niobium, which is used to strengthen steel and is widely employed in making cars and natural-gas pipelines.
The company produces more than 80% of the world's supply of niobium, which is used to strengthen steel and is widely employed in making cars and natural-gas pipelines.
These minerals are the principal sources of columbium (commonly called niobium), tantalum and molybdenum metals.
Columbite is the ore of niobium, which is used in steels and high strength alloys.
Lance Cooley of the Fermi National Accelerator Laboratory is working with a metallic element called niobium to create the next generation of high-energy physics experiments.
Columbium (also called niobium), like vanadium, is generally considered to increase the hardenability of steel.
China produces 95 percent of all rare earth concentrates, which are used in the production of many consumer electronics, and Brazil supplies 90 percent of all niobium, which is needed for steel alloys.
Brasileira de Metalurgia e Mineracao and China's role in niobium supply.
CBMM mines and processes niobium, a key rare metal used to produce high-end products such as automotive steel and pipelines.