Internet Encyclopedia of Science
GEOLOGY & PLANETARY SCIENCE
A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

                   • HOME
• ABOUT
• CATEGORIES
• COPYRIGHT
• NEWSLETTER

  



wolframite


wolframite
Wolframite. Credit: Mineral Information Institute
Iron manganese tungstate (Fe, Mn)WO4, the chief ore of tungsten. Wolframite forms brown to black monoclinic crystals or granular masses. It is found in quartz veins and pegmatites associated with granitic rocks and also in high-temperature hydrothermal veins in association with other minerals, including tin ores. China is the main producer. Hardness 5–5.5, relative density 7–7.5.


Related category

   • GEOLOGY AND PLANETARY SCIENCE


Also on this site:

Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History



BACK TO TOP