Pieces of manganese,a brittle,grey transition metal. The main commercial manganese ore is pyrolusite (manganese oxide),but it is also extracted from rhodochrosite,braunite and hausmannite. Manganese is used as a deoxidising agent and in alloys with other metals,especially in ferrous alloys known as manganese steels. The element was discovered in 1774 by Scheele and has the chemical symbol Mn | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lappa, Russ |
Taille de l’image : | 3703 px × 2455 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
|