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  4. NioCorp Developments Ltd. (NIOBD) Message Board

Niocorp (TSX VENTURE:NB)(OTCQX:NIOBF)(FRANKFURT:BR

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Post# of 38
Posted On: 08/16/2014 12:42:42 PM
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Posted By: Sawbuckle
Niocorp (TSX VENTURE:NB)(OTCQX:NIOBF)(FRANKFURT:BR3)

In 2015 when the feasibility study hits the market this symbol could rock.
Niobium is an incredible element and has many uses see below:

Overview:

Niobium is a transition metal in Group 5 (VB) of the periodic table. The periodic table is a chart that shows how chemical elements relate to one another.

Niobium has a very interesting history. It was discovered by English chemist Charles Hatchett (1765-1847) in 1801. Hatchett found the element in a stone sent from North America. He named the element columbium. For years, scientists argued about the correct name for the element. Some still call the element columbium, although the official name is now niobium.

Niobium is used in many alloys. An alloy is made by melting and mixing two or more metals. The mixture has properties different from those of the individual metals. Niobium alloys are used in items that come into contact with the human body, such as rings for pierced ears, nose, and other body parts. Niobium is used in this kind of jewelry because it does not cause allergies or other problems.

SYMBOL
Nb

ATOMIC NUMBER
41

ATOMIC MASS
92.9064

FAMILY
Group 5 (VB)
Transition metal

PRONUNCIATION
nye-OH-bee-um

Discovery and naming

Historians today give credit for the discovery of niobium to Hatchett. The English chemist found the element in a "very heavy black stone, with golden streaks" that he found in the British Museum. The stone had been sent to England from the United States by John Winthrop (1681-1747). Winthrop was a member of the British Royal Society, one of the most important scientific societies in the world. (He was also the grandson of the first governor of Connecticut and the great-grandson of the first governor of Massachusetts.) The rock had sat in the British Museum for nearly 70 years before anyone decided to analyze it. When Hatchett did so in 1801, he discovered a new element. He named it columbiun, after the mineral columbite in which it is often found.

Not everyone agreed with Hatchett's discovery at first. Some chemists were convinced that columbium was identical to the element tantalum, which had been discovered earlier. The confusion is easy to understand. The two elements have very similar properties and are difficult to separate. Finally, in 1844, German chemist Heinrich Rose (1795-1864) showed that tantalum and columbium really were different from each other. Rose then suggested the name niobium for the new element. The name comes from Greek mythology. Niobe is the daughter of the god Tantalus, from whom the name tantalum comes.

Scientists debated for nearly a century over which name to use. In 1949, niobium was officially adopted. However, many metallurgists (scientists who work with metals) still use the name columbium for the element.

Physical properties

Niobium is a shiny gray metal with a melting point of 2,468°C (4,474°F) and a boiling point of 4,927°C (8,901°F). Its density is 8.57 grams per cubic centimeter.

Chemical properties

Niobium metal is resistant to attack by most common chemicals. It does not combine with oxygen or most other active elements except at high temperatures. It does not react with most strong acids unless they are hot and concentrated.

Occurrence in nature

Niobium occurs primarily in two minerals, columbite and pyrochlore. The original name columbium was taken from the first of these minerals. Niobium always occurs with tantalum in these minerals. Separating the two elements is always the most difficult step in their preparation.

Columbite and pyrochlore are not mined in the United States. These two minerals are imported primarily from Brazil and Canada.

Scientists believe that niobium's abundance in the Earth's crust is about 20 parts per million. That makes it about as abundant as nitrogen and lithium, and slightly more abundant than lead.

Isotopes

Only one naturally occurring isotope of niobium exists, niobium-93. Isotopes are two or more forms of an element. Isotopes differ from each other according to their mass number. The number written to the right of the element's name is the mass number. The mass number represents the number of protons plus neutrons in the nucleus of an atom of the element. The number of protons determines the element, but the number of neutrons in the atom of any one element can vary. Each variation is an isotope.

At least a dozen radioactive isotopes of niobium are known also. A radioactive isotope is one that breaks apart and gives off some form of radiation. Radioactive isotopes are produced when very small particles are fired at atoms. These particles stick in the atoms and make them radioactive.

None of the radioactive isotopes of niobium have any practical application.

Extraction

The first step in preparing niobium metal is to separate its compounds from tantalum in an ore. The niobium compounds are then heated in air to change them to niobium oxide (Nb2O5). This is then heated with charcoal (carbon) to produce free metal:


Uses

Niobium is used primarily in making alloys. For example, the addition of niobium to steel greatly increases its strength. One use of such steel is in the construction of nuclear reactors.

Nuclear reactors are devices in which the energy of nuclear reactions is converted to electricity. Niobium steel is used because it keeps its strength at the very high temperatures produced there.

The demand for niobium steel has increased. One reason is its increased use in airplanes and space vehicles. Some skateboards also include niobium steel components.

Another popular use of niobium alloys is in the making of jewelry. These alloys are lightweight and hypoallergenic. The term hypoallergenic means that they do not cause skin reactions. People who wear pierced earrings or similar forms of jewelry will not develop skin problems from niobium alloy jewelry.

Niobium alloys are also used in the construction of superconducting magnets. A superconducting material is one that has no resistance to an electric current. Once an electric current begins to flow in such a material, it continues to flow practically forever.

The most powerful magnets in the world are those made with superconducting materials. In 1997, a new record was set for superconducting magnets at the Lawrence Berkeley Laboratory in Berkeley, California. A magnet made with an alloy of niobium and tin proved to be three times as strong as the best magnet previously known.

Compounds

Niobium diselenide (NbSe2) is sometimes used as a lubricant at high temperatures. It does not break down at temperatures up to about 1300°C. Niobium silicide (NbSi2) is used as a refractory material. A refractory material is one that can withstand very high temperatures.

Niobium alloys are used in jewelry because they are lightweight and hypoallergenic (won't cause skin reactions).

Health effects

Neither niobium nor its compounds are known to pose serious health effects for humans and animals.


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