Unusual lattice vibrations have been discovered in scandium trifluoride — a simple compound that shrinks when heated. This finding may help to explain the phenomenon of negative thermal expansion.
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Attfield, J. A fresh twist on shrinking materials. Nature 480, 465–466 (2011). https://doi.org/10.1038/480465a
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DOI: https://doi.org/10.1038/480465a
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