The fact that the Rio Grande rise also harbors traces of iron and manganese was not lost on the minerals industry.
Black oxyde of manganese is also used in small quantities, with the view of rendering the glass more colorless and transparent.
The manganese ores are mined principally in the oxidized zone.
The critical percentage where the amount of manganese appears to give the greatest efficiency seems to be 0.02%.
It is an advantage to add granulated carbon to the manganese.
In both these cases the oxygen is generated by heating a mixture of chlorate of potash and manganese black oxide.
The atomic weight of manganese has been frequently determined.
The quality of the manganese ores, however, is low, and reserves of chromium are insufficient for the needs of the economy.
At the center of the cell is a rod of carbon and manganese dioxide.
That meant both piles of manganese that lay on the gallery next the crane were to be shoveled in—double time for us, in the heat.
1670s as the name of a mineral, oxide of manganese, from French manganèse (16c.), from Italian manganese, alteration or corruption of Medieval Latin magnesia (see magnesia). From 1783 in English as the name of an element.
manganese man·ga·nese (māng'gə-nēz', -nēs')
A brittle metallic element, having several allotropes. It is alloyed with steel to increase strength. Atomic number 25; atomic weight 54.9380; melting point 1,246°C; boiling point 2,061°C; specific gravity 7.21 to 7.44; valence 1, 2, 3, 4, 6, 7.
A grayish-white, hard, brittle metallic element that occurs in several different minerals and in nodules on the ocean floor. It is used to increase the hardness and strength of steel and other important alloys. Atomic number 25; atomic weight 54.9380; melting point 1,244°C; boiling point 1,962°C; specific gravity 7.21 to 7.44; valence 1, 2, 3, 4, 6, 7. See Periodic Table.