Manganese (Mn)
Ian Leach
Basic Information
- Symbol-Mn
- Atomic Number-25
- Atomic Weight-54.93
- In Group 7 and Period 4
- It is metallic
History
- Johann Gahn discovered it in Sweden, 1974
- Latin of Manes- means magnet
- Oxygen removed from Mn(2O) to make pure Manganese
- http://www.periodictable.com/Samples/025.7/s13.JPG
Uses
- Strengthens steel
- Creates ferromagnetic alloys
- Gives amethyst its color
- http://crystal-cure.com/pics/amethyst-rough.jpg
Description
- Resembles iron, but is harder
- Silvery Metallic Metal
- https://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Mangan_1-crop.jpg/220px-Mangan_1-crop.jpg
Biology (in humans)
- .0002g of manganese per kg of human
- 0.00009080000000000001g per lb. of human
- 200 parts per billion by weight
- Compounds are essential to life
- http://eathealthylivefit.com/wp-content/uploads/2014/05/Foods-Minerals-Manganese-EatHealthyLiveFit_com-300x206.png
Geology
- Most abundant in meteorites
- Also in Earth's crust
- 10,000ppb in sun
- 8,000ppb in the universe by weight
- https://lh4.googleusercontent.com/-YT0y87OO31Q/T7IJZZ0s7HI/AAAAAAAAANU/fZTN1P-ZNsk/w1200-h729/manganese.jpg
Properties
- Melts at 1245.85C
- Not very good at thermal conduction- 7.8 W m-1 K-1(Max 430)
- Density of 7470kg m-3
- http://www.steinertglobal.com/fileadmin/_processed_/csm_Manganese_element_9875b01357.jpg
Interesting Facts
- Burns in oxygen and nitrogen
- Not found as free metal in nature
- It's crystal structure is cubic
- https://i.ytimg.com/vi/09RbY-v0Zsw/hqdefault.jpg