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minor metals
Minor metals is a widely used term in the metal industry that generally refers to primary metals not traded on the London Metal Exchange (LME).
==Characteristics==
Two characteristics are regularly associated with minor metals: (1) their global production is relatively small in comparison to base metals, and (2), they are predominantly extracted as by-products of base metals.〔Bell, T. (March 2010) Defining Minor & Strategic Metals. Retrieved from: http://www.strategic-metal.com/index.php/news/content/Defining_Minor_and_Strateigic_Metals〕 However, due to the diversity of the metals often classified as minor metals, there is still much discussion about what exactly defines a minor metal.〔〔Lifton, J. (November 15, 2007) Minor Metals. ResourceInvestor.com. Retrieved from http://www.resourceinvestor.com/News/2007/11/Pages/Minor-Metals.aspx〕 It has also been noted that minor metals can also be characterized as having relatively few end uses in comparison to base metals and that they are more difficult to extract from their naturally occurring host minerals than base metals.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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