from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A mineral form of molybdenum sulfide, MoS2, that is the principal ore of molybdenum.

from The Century Dictionary.

  • noun Sulphid of molybdenum, occurring in foliated masses or in scales, less often in hexagonal crystals, of a lead-gray color and metallic luster. It is very soft, and, like graphite, which it closely resembles, leaves a trace on paper.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) A mineral occurring in soft, lead-gray, foliated masses or scales, resembling graphite; sulphide of molybdenum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mineralogy A mineral, molybdenum disulfide MoS2, that is the principal ore of molybdenum; it is structurally similar to graphite and has a similar look and feel.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a mineral resembling graphite that is valued as the chief source of molybdenum and its compounds


from The American Heritage® Dictionary of the English Language, 4th Edition

[molybden(um) + –ite.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From molybdenum +‎ -ite.


  • Closeups of cobaltite, top, a rare ore of cobalt, and molybdenite, bottom, the main ore of molybdenum.

    LME to Broaden Metals Reach

  • Geologically, molybdenite forms in high-temperature environments such as in igneous rocks.


  • The most important ore source of molybdenum is the mineral molybdenite.


  • In 1778, Swedish chemist Carl William Scheele was studying, what he thought was lead, in the mineral molybdenite.


  • Some molybdenite forms when igneous bodies contact rock and metamorphose, or change, the rock.


  • Specifically, it is obtained from the processing of the mineral molybdenite (a molybdenum ore) that is found in porphyry copper deposits.


  • Molybdenum was extracted from the granite in Baltschieder during the second world war, from a unique occurrence where molybdenum is present in granite as molybdenite.

    Jungfrau-Aletsch-Bietschhorn, Switzerland

  • Molybdenum was discovered by the Swedish scientist, Peter Hjelm in 1781, three years after Carl Scheele proposed that a previously unknown element could be found in the mineral molybdenite.


  • Rhenium does not form minerals of its own, but it does occur as a trace element in columbite, tantalite and molybdenite.


  • The United States produces significant quantities of molybdenite from mines in Colorado, New Mexico, and Idaho.



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