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This material, in part, is based on work supported under a National Science Foundation Graduate Fellowship. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under contract No. W-7405-ENG-82. This work was supported by the Office of Basic Energy Sciences.
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Herchenroeder, J.W., Gschneidner, K.A. Stable, metastable and nonexistent allotropes. Bulletin of Alloy Phase Diagrams 9, 2–12 (1988). https://doi.org/10.1007/BF02877443
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DOI: https://doi.org/10.1007/BF02877443