The critical shortage of rare-earth elements is a concern for a number of important technologies, but also an opportunity to research alternative materials and technologies, says Alexander King, director of the US Department of Energy's Ames Laboratory.
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Heber, J. Purveyor of the rare. Nature Mater 10, 162–163 (2011). https://doi.org/10.1038/nmat2973
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DOI: https://doi.org/10.1038/nmat2973
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