columbite

Columbite is a black ore of niobium which has a submetallic luster and a high density. It is used as an alloy of steel to form weldable high speed steel for radio transmitting valves and heat sensitive detective devices. In Plateau, Kano, Kaduna, Bauchi, Kogi, and Nasarawa states, this precious gem is found ...

The project area is located approximately 30 km east of the town of Mutoka in north eastern Zimbabwe and some 160 km from the capital city, Harare, and consists of a swarm of Lithium-Caesium-Tantalum pegmatites which were historically worked for spodumene, beryl, tantalite, columbite, cassiterite, ...

Today, we produce more for less money? Indeed, what has gone up in price for any Nigerian and African products? We need a new economic model. The plight of being a primary producer is clearly ominous. The West, China, Russia scoop the earth of Africa for minerals such as magnesium, Columbite, ...

The economy will be revved up when steel, limestone, uranium, columbite, tin, coal, bitumen, kaolin and the likes are cultivated and harnessed into exportable products. More foreign exchange would come in and the naira will experience a significant rise in stature. Unemployment rate can be drastically ...

Pegmatites in the Tantalite Valley District have been mined since about 1946 for beryl, columbite-tantalite, lithium and bismuth minerals. Mineralization from historic records of pegmatite occurrences in the area are reported as lepidolite, spodumene, amblygonite, rubellite and tantalite. The area has recently ...

Africa must find ways to encourage the West that what is good for the goose is good for the gander. The West and China mines and scoop earth, Copper, Columbite, Magnesium, Calcite and other forms of rare earth, uranium, aluminum, gold, diamonds etc. out of Africa. They sell these manufactured items ...

In full, coltan's name is columbite-tantalite, after Tantalus, the figure in Greek mythology who was condemned to a horrifying eternal torment, of the things he most desired being just out of his grasp. For many people in Congo, that's exactly what coltan is – close enough to touch, but its riches out of reach.