Abstract
The Scientific Correspondence by Roy and Agrawal1 commenting on a News and Views article by Robert Cahn2 states that their work had not been acknowledged by Cahn or by us. Cahn's article emphasized negative thermal expansion, but the three reviews mentioned by Roy and Agrawal are about low thermal expansion. All of our papers (refs 3-5 in ref. 2) prominently mention the work of Roy and Agrawal on the family of compounds based on NaZr2P3O12(NZP). Further, the thermal expansion properties in the zirconium tungstate family3,5 highlighted by Cahn2 differ dramatically from other materials, including those of the NZP family. Roy and Agrawal stated that the unusual thermal expansion in the NZP family was discovered by them, but this was first seen by Boilot et al.6, as they acknowledge in their earlier papers7.
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References
Roy, R. & Agrawal, D. Nature 388, 433(1997).
Cahn, R. Nature 386, 22–23 (1997).
Korthius, V. et al. Chem. Mater. 7, 412–417 (1995).
Evans, J. S. O., Mary, T. A., Vogt, T., Subramanian, M. A. & Sleight, A. W. Chem. Mater. 8, 2809–2823 (1996).
Sleight, A. W. Endeavour 19, 64–68 (1995).
Boilot, J. P., Salanie, J. P., Desplanches, G. & Le Potier, D. Mater. Res. Bull. 14, 1469–1477 (1979).
Agrawal, D. K. & Roy, R. J. Mater. Sci. 20, 4617–4623 (1985).
Oota, T. & Yamai, I. J. Am. Ceram. Soc. 69, 1–6 (1986).
9.Buessem, W. R. in Mechanical Properties of Engineering Ceramics (eds Kreigel, W. W. & Palmour, H. III) 127-148 (Interscience, New York, 1961).
Srikanth, V. J. Am. Ceram. Soc. 74, 365–368 (1991).
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Sleight, A. Thermal contraction. Nature 389, 923–924 (1997). https://doi.org/10.1038/40052
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DOI: https://doi.org/10.1038/40052
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