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niobium
Molecular formula : MW : CAS : nature : Formerly known as coltan. Cycle Series �?deputy group (group V) elements. Atomic number 41. Stable isotopes : 93. Amu 92.90638. Steel gray. A hard and ductility. Density 8.57. About 2,468 ° C melting point. Boiling Point 4760 ° C The main valence +3, +4 and +5. In the air, under stable temperature, 200 ° C at the beginning of oxidation dense oxide films. The corrosion resistance of weaker than tantalum. With 5% sodium hydroxide or potassium hydroxide solution role. Soluble in hot sulfuric acid and hydrofluoric acid. The main system for the High Temperature Superconducting alloy and alloy (Nb₃Sn). In addition niobium alloys, can significantly improve its mechanical properties and corrosion resistance. Improved steel welding performance, enhance its ability to creep resistance. Also for the tube and nuclear reactors. Tantalum is often coexist in niobium iron, niobium tantalite and other Central. May 7 potassium fluoride K₂NbF₇ a niobium using sodium reduction, or niobium oxide with calcium, aluminum or hydrogen reduction and prepared. Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".
Structure:
Please see below "More Detailed Data"
More Detailed Data:
1) Niobium 2) NIOBIUM 3) niobium 4) niobium Nb 5) zirconium-niobium 6) Niobium oxide 7) niobium boride;niobium boride;Niobium boride 8) niobium powder 9) niobium alloys 10) niobiumhydrides
Notice	Some description was translated by software and the data is only as a reference.
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