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Molybdenite
Molybdenite - Mineral Properties and Uses |
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What is Molybdenite? |
Molybdenite is a molybdenum sulfide mineral and the leading ore of molybdenum. It occurs as an accessory mineral in some granites and pegmatites. It is also found in some copper porphyry deposits, contact metamorphic rocks and high temperature vein deposits. It is a soft gray mineral that is easily confused with graphite. |
Uses |
Molybdenite is the primary ore of molybdenum. It has also been used as a specialty libricant. |
Color |
lead gray |
Streak |
bluish gray grayish black |
Luster |
metallic |
Diaphaneity |
opaque |
Cleavage |
perfect |
Hardness |
1.0 - 2.0 |
Specific Gravity |
4.6 - 4.8 |
Distinguishing
Characteristics |
greasy feel, color, streak, specific gravity |
Crystal System |
hexagonal |
Chemical Classification |
sulfide |
Chemical Composition |
molybdenum sulfide, MoS2 |
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Molybdenite in quartz from Calaveras County, California.
Specimen is approximately 4 inches (10 centimeters) across
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Molybdenite in quartz from Climax, Colorado.
Specimen is approximately 4 inches (10 centimeters) across.
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Molybdenite from Whitehall, Montana.
Specimens are approximately 1/2 inch to 1 inch (1.3 centimeters to 2.5 centimeters) across.
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