Founded: 1774

Discovered by Johan Gottlieb Gahn

- Classified as a metal

- Uses:

- Added to steel and removes oxygen and sulfur from steal increasing its maleability and strength. Makes steel strong enough withstand the constant pressure of trains in train tracks.

- Gives glass a *amethyst color (*amethyst, a clear purple color)

- Manganese dioxide is used in dry cell batteries

- 90% of manganese products are involved with steel products.

- 0.14% of the earth's crust is made of Manganese dioxide

Melting Point: 1519 K

Boiling Point: 2334 K

Density: 7.3 g/ cubic centimeter