Manganese Ore
Name and Composition - Manganese ore consists chiefly of two minerals Pyrolusite (manganese dioxide MnO2) and Psilomelence (hydrated manganese dioxide: MnO2 nH2O).
Physical Properties - The ore minerals generally occur in amorphous form. It is iron grey / black to steel grey coloured with sub–metallic luster.
Mode of Occurrence - Occurs as pockets, beds etc. in archaen metamorphic rocks originally of sedimentary origin in the form of veins.
Uses - It is a source for extracting manganese metal. It is used in steel manufacturing, ferromanganese alloys, pig iron dry cell batteries, chemicals, oils, varnish, paints, leather, match industries and in agriculture.
Mineral based Industries – Textile, varnish, dry cell batteries etc.
Industrial Prospects – Nil.
Physical Properties
Hardness
Sp. gr.
Melting point
Boiling point
Density
Sp. gr.
Melting point
Boiling point
Density
5.7 to 6.5
7.21 to 7.44
1246 °C
2061 °C
7.21 g/cm3
7.21 to 7.44
1246 °C
2061 °C
7.21 g/cm3
Chemical Properties
Oxidation states
Electronegativity
Atomic number
Electronegativity
Atomic number
7, 6, 5, 4, 3, 2, 1, −1, −2, −3
Pauling scale: 1.55
25
Pauling scale: 1.55
25
Indian Minerals
Metallic Minerals
Cadmium Ore
Copper Ore
Lead Ore
Zinc Ore
Iron Ore
Manganese Ore
Tungsten Ore
Bauxite Ore
Limestone and Dolomite
Limestone
Dolomite
Fertilizer Minerals
Gypsum
Pyrite
Rock Phosphate
Saltpeter
Fuel Minerals
Lignite
Glass and Ceramic Minerals
Ball Clay
China Clay
Feldspar
Fire Clay
Kyanite
Quartz
Quartzite
Silica Sand
Precious and Semiprecious Minerals
Aquamarine
Emerald
Industrial Minerals
Asbestos
Barytes
Bentonite
Calcite
Fluorite
Fuller's Earth
Garnet
Graphite
Magnesite
Mica
Mill Stone
Ochre
Pyrophylite
Siliceous Earth
Silimanite
Soapstone
Vermiculite
Wollastonite
Dimensional and Building Stone
Granite
Limestone - Flaggy
Marble
Rhyolite
Sandstone
Serpentinite
Shale/Schist/Phyllite
Slate