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Rare Earth Elements in National Defense


Some Members of Congress have expressed concern over U.S. acquisition of rare earth materials composed of rare earth elements (REE) used in various components of defense weapon systems. Rare earth elements consist of 17 elements on the periodic table, including 15 elements beginning with atomic number 57 (lanthanum) and extending through number 71 (lutetium), as well as two other elements having similar properties (yttrium and scandium). These are referred to as “rare” because although relatively abundant in total quantity, they appear in low concentrations in the earth’s crust and extraction and processing is both difficult and costly.

From the 1960s to the 1980s, the United States was the leader in global rare earth production. Since then, production has shifted almost entirely to China, in part due to lower labor costs and lower environmental standards. Some estimates are that China now produces about 90- 95% of the world’s rare earth oxides and is the majority producer of the world’s two strongest magnets, samarium cobalt (SmCo) and neodymium iron boron (NeFeB) permanent, rare earth magnets. In the United States, Molycorp, a Mountain Pass, CA mining company, recently announced the purchase of Neo Material Technologies. Neo Material Technologies makes specialty materials from rare earths at factories based in China and Thailand. Molycorp also announced the start of its new heavy rare earth production facilities, Project Phoenix, which will process rare earth oxides from ore mined from the Mountain Pass facilities.

In 2010, a series of events and press reports highlighted what some referred to as the rare earth “crisis.” Some policymakers were concerned that China had cut its rare earth exports and appeared to be restricting the world’s access to rare earths, with a nearly total U.S. dependence on China for rare earth elements, including oxides, phosphors, metals, alloys, and magnets. Additionally, some policymakers had expressed growing concern that the United States had lost its domestic capacity to produce strategic and critical materials, and its implications for U.S. national security.

Pursuant to Section 843, the Ike Skelton National Defense Authorization Act for FY2011 (P.L. 111-383) and S.Rept. 111-201 (accompanying S. 3454), Congress had mandated that the Secretary of Defense conduct an assessment of rare earth supply chain issues and develop a plan to address any vulnerabilities. DOD was required to assess which rare earths met the following criteria: (1) the rare earth material was critical to the production, sustainment, or operation of significant U.S. military equipment; and (2) the rare earth material was subject to interruption of supply, based on actions or events outside the control of the U.S. government. The seven-page report was issued in March 2012.

In October 2013, DOD released its Annual Industrial Capabilities Report to Congress in accordance with Section 2504 of Title 10, United States Code (U.S.C.). The report states that, due to global market forces, the overall demand for rare earth materials has decreased, as prices for most rare earth oxides and metals have declined since 2011.

Given DOD’s assessment of the supply and demand for rare earths for defense purposes, coupled with the recent announcement of Molycorp’s proposed acquisition of Neo Material Technologies, Congress may choose to use its oversight role to seek more complete answers to the following important questions:

  • Given Molycorp’s purchase of Neo Material Technologies and the potential for

the possible migration of domestic rare earth minerals to Molycorp’s processing

Congressional Research Service

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