Lexic.us

Definition of Niobium

1. Noun. A soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium.

Definition of Niobium

1. n. A later name of columbium. See Columbium.

Definition of Niobium

1. Noun. a metallic chemical element (''symbol'' Nb) with an atomic number of 41. ¹

¹ Source: wiktionary.com

Definition of Niobium

1. a metallic element [n -S] : NIOBIC, NIOBOUS [adj]

Medical Definition of Niobium

1. A later name of columbium. See Columbium. Origin: NL, fr. L. & E. Niobe. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Niobium

Literary usage of Niobium

Below you will find example usage of this term as found in modern and/or classical literature:

1. Manual of Qualitative Chemical Analysis by C. Remigius Fresenius (1897)
"niobium, Nb, or COLUMBIUM, Cb. niobium combines with oxygen in several ... If the solution of potassium niobium oxyfluoride is boiled for a long time, ..."

2. Analytical Chemistry by Frederick Pearson Treadwell (1921)
"M. Pt. = I9600 C.* The metal niobium, also called columbium, is very similar to tantalum but is more readily attacked by acids. niobium forms three oxides: ..."

3. A Treatise on Chemistry by Henry Enfield Roscoe, Harold Govett Colman, Arthur Harden (1902)
"niobium, Nb 93-5. 407 This metal is so closely connected with the next one, tantalum, that it will be most convenient to consider their history together. ..."

4. Hand-book of Chemistry by Leopold Gmelin, Henry Watts (1850)
"On digesting in water, an insoluble acid salt of potash is obtained. The latter is soluble in solution of potash. niobium ..."

5. A Dictionary of Chemistry and the Allied Branches of Other Sciences by Henry Watts (1871)
"niobium occurs, as already mentioned, in columbite, which is a niobate of iron and manganese, in most cases partly replaced by tantalum ; certain Greenland ..."

6. Victor Von Richter's Text-book of Inorganic Chemistry by Victor von Richter (1901)
"The three rare elements, vanadium, niobium and tantalum, ... niobium and tantalum unite with potassium fluoride, forming double salts, eg, ..."

7. The School of Mines Quarterly by Columbia University School of Chemistry (1909)
"The determination of niobium and tantalum, when existing together, has always been a stumbling block to the analytical chemist. The only method at present ..."

Other Resources: