from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A black to red-brown mineral, (Fe,Mn)(Ta,Nb)2O6, distinguished from columbite by the predominance of tantalum over niobium and used as an ore of both elements.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A dark-brown mineral that is an ore of tantalum and niobium, of the chemical formula (Fe, Mn) Ta2O6.
from the GNU version of the Collaborative International Dictionary of English
- n. A heavy mineral of an iron-black color and submetallic luster. It is essentially a tantalate of iron.
from The Century Dictionary and Cyclopedia
- n. A rare mineral, occurring crystallized and massive, of an iron-black color and submetallic luster.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum
On Boing Boing Gadgets, this wrenching video in which Eve Ensler explains that Congolese militias use rape to enforce discipline among a slave workforce that mines columbite-tantalite ore, a common raw material for many devices.
Among these riches is coltan - columbite tantalite - a mineral highly prized for its use in a number of consumer electronic products, among other things.
Overall, Congo has over half the world's cobalt, one-third of its diamonds, and three-fourths of its vital columbite-tantalite or "coltan," essential for computer chips, circuit boards, mobile phones, laptops, and other electronic devices.
Africa provides columbite-tantalite, the mineral from which most computer chips are made.
For example: A primary component in your beloved cell phone is “Coltan” (Columbite-tantalite), a metallic ore found mainly in the Democratic Republic of Congo.
Rhenium does not form minerals of its own, but it does occur as a trace element in columbite, tantalite and molybdenite.
Industries: fish processing (mainly shrimp and Greenland halibut); gold, niobium, tantalite, uranium, iron and diamond mining; handicrafts, hides and skins, small shipyards
There are deposits of gold, cassiterite (a tin ore) and coltan (columbite-tantalite) ore of a high grade which in 2000 fetched very high prices as a metal used in computer and mobile phone microchips.
Virunga is rich is strategic minerals, including gold, tantalite (coltan) and uranium, and one reason why multi-national interests would gain the advantage if Virunga Park were devoid of human inhabitants.
Greenlandfish processing (mainly shrimp and Greenland halibut); gold, niobium, tantalite, uranium, iron and diamond mining; handicrafts, hides and skins, small shipyards