Molybdenite

Molybdenite is a sulfide mineral and the most important ore of molybdenum, a metal which is used in high strength alloys and as an industrial lubricant.

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Information about Molybdenite

 

Appearance

Molybdenite is a soft lead grey metallic mineral which often occurs as flakes or plate-like masses. It can also be massive or lamellar; sometimes its even mistaken with graphite.


Uses and History

 

A primary ore of molybdenum, an important metal which is highly prized for the creation of high strength steel alloys.

 

There are some other high tech uses for molybdenum, including the manufacture of transistors and semiconductors, and as an industrial lubricant.

 

Molybdenum was first discovered by Carl Wilhelm Scheele in 1778.


Mineralogy

Chemistry
Molybdenum disulfide, MoS2.
Colours and Variations

 

Black, silvery-grey, gunmetal grey.

 

Streak
Blueish grey
Luster
Metallic
Transparency
Opaque
Fracture
Uneven / subconchoidal
Crystal habit
Thin, platy and hexagonal crystals. Can also be massive, lamellar, granular.
Mohs hardness
1 – 1.5
Fluorescence
Specific Gravity
4.62 – 4.73
Easiest testing method

Hazards and Warnings

 

Molybdenum is toxic when ingested, but this is primarily due to exposure in the environment, or excess exposure from industry, etc.

 

 

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.
Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis. When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.


Translations

Arabic:

  • الموليبدينيت

Hindi:

Portuguese:

  • Molibdenite

Bengali:

Indonesian:

Punjabi:

English:

Italian:

  • Molibdenite

Russian:

  • Молибденит

French:

  • Molybdénite

Japanese:

  • 輝水鉛鉱

Spanish:

  • Molibdenita

German:

  • Molybdänglanz
  • Molybdänit

Korean:

Thai:

  • โมลิบเดไนต์

Gujurati:

Mandarin Chinese:

  • 辉钼矿

Urdu:


Further Reading / External Links