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The chemical formula of mineral Molybdenite is indicated by MoS2 or Molybdenum Sulfide. Molybdenite is actually a Sulfide mineral. Molybdenite is considered as a major ore of Molybdenum. Molybdenum is most commonly used as mineral specimen and it is most often found exhibiting nice and splendid images when viewed with the aid of polarized light microscope used in the field of optical mineralogy. Molybdenite is a very soft metallic mineral. Molybdenite is also called Moly Ore. This mineral commonly exhibits a very high luster when viewed in reflected light of polarized microscope and is considered a very interesting mineral to add to a collection. Molybdenite is known to crystallize in the hexagonal system of crystal formation. In optical mineralogy, the hexagonal system of crystallization comprises crystals having four axes. Three of which are positioned in a single plane with equal length and are symmetrically spaced. The fourth axis is found to be perpendicular to the other three axes.

 

            Molybdenite mineral can be easily confused with graphite but not with many other minerals. The structure of mineral Molybdenite is composed of molybdenum ions sandwiched between layers of sulfur ions. The layers of sulfur are strongly bonded to the molybdenum but they are not strongly bonded to other sulfur layers. This is why Molybdenum is soft and possesses perfect cleavage. Mineral Molybdenite is soft enough to leave a mark on paper and fingers. Its greasy feel is actually brought about by its extreme softness. Most Molybdenite crystals are found opaque in appearance. The crystal habit of mineral Molybdenite as described in the field of optical mineralogy usually include thin, platy hexagonal crystals that are terminated by pinacoidal faces, also as tapering six-sided pyramids that can be truncated by the pinacoids. Molybdenite can be also found massive, lamellar, and in small grains in sulfide ore bodies and recrystallized marbles.

 

            Mineral Molybdenite is most commonly found showing perfect cleavage in one direction, forming thin sheets, and this can be seen more clearly visible when mineral is viewed with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. Molybdenite is also usually found showing flaky fracture when viewed with the aid of polarized microscope for mineralogists. The hardness measure of the mineral Molybdenite when it is evaluated using the Mohs scale method is usually found ranging from 1.5 to 2. Molybdenite is most commonly found leaving a bluish streak when specimen is rubbed on a white porcelain streak plate. The specific gravity measure of the mineral is usually found ranging from 4.7 grams per cubic centimeters to 4.8 grams per cubic centimeters, which is considered average for metallic minerals.

 

            Molybdenite is most commonly found associated with other interesting minerals such as pyrite, scheelite, wolframite, quartz, chalcopyrite, and fluorite. Mineral Molybdenite is known to have thin cleavage sheets and crystals are flexible but are not elastic. Molybdenite mineral crystals has greasy feel and it usually leaves marks on fingers. The best field indicators of mineral Molybdenite include softness, density, crystal habit, bluish streak, color, and cleavage. Mineral Molybdenite notably occurs at its type of localities at Climax in Colorado, some Canadian Localities, and some areas in Norway.



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Tuesday, March 31st, 2009 at 8:01 am
Category:
The Sulfides Mineral Class
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