 |
 |
 |
||
 |
 |
|||
 |
||||
 |
|
|
|
|
|
|
|
|
||
|
|
|
|||
|
|
||||
|
|
|
|
|
|
Metal > ManganeseMn - Manganese A transition metal. The metal discovered in 1770 by Ignatius Kaim, investigated by Bergman and Scheele and finally isolated by swedish mineralist Johann Gottlieb Gahn. The permanganate ion is used in several of our laboratory exercises. Atomic number - 25 Density g/mL 7 .43 Atomic weight u 54 .938 Melting point K 1517 Bonding radius A 1 .17 Boiling point K 2335 Atomic radius A 1 .79 Heat of vaporization kJ/mol 226 Ionization Potential V 7 .435 Heat of fusion kJ/mol 12 .05 Electronegativity - 1 .55 Specific heat J/gK 0 .48 The oxide is a strong acid. Crystal are body centered cubic. Electron config. : [Ar] 3d5 4s2 Definition: One of the most important constituents of steel in which it fulfils a number of functions. It acts as a mild de-oxidising agent. It combines with the sulphur present to form globular inclusions of Manganese Sulphide which are beneficial to machining. It increases tensile strength and the hardenability of steel.
|
|
|
Metal Resources Directory an information portal on various metal industries in the world. Metal mining companies, metal processing companies, product manufacturing industries list of metal industries high temp metals at Metal Resource Link Partners Industry Metal | Cnc Machines | Metal Information | Site Map | Contact Us |