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Structures of K0.05Na0.95NbO3 (50-300 K) and K0.30Na0.70NbO3 (100-200 K)
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Zhang, N., Glazer, A. M. (Anthony Michael), Baker, Daniel William and Thomas, Pam A. (2009) Structures of K0.05Na0.95NbO3 (50-300 K) and K0.30Na0.70NbO3 (100-200 K). Acta Crystallographica Section B (Structural Science), Vol.65 (Part 3). pp. 291-299. doi:10.1107/S0108768109011057 ISSN 0108-7681.
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Official URL: http://dx.doi.org/10.1107/S0108768109011057
Abstract
Rietveld refinement using neutron powder diffraction data is reported for the potential lead-free piezoelectric material KxNa1-xNbO3 (x = 0.05, x = 0.3) at low temperatures. The structures were determined to be of rhombohedral symmetry, space group R3c, with the tilt system a(-)a(-)a(-) for both compositions. It was found that some of the structural parameters differ significantly in the two structures, and particularly the NbO6 octahedral strains as a function of temperature. The 300 K profile for K0.05Na0.95NbO3 shows the coexistence of rhombohedral and monoclinic phases, which indicates that the phase boundary is close to room temperature; the phase boundary for K0.30Na0.70NbO3 is found to be at approximately 180 K.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Acta Crystallographica Section B (Structural Science) | ||||
Publisher: | Wiley-Blackwell Publishing, Inc | ||||
ISSN: | 0108-7681 | ||||
Official Date: | June 2009 | ||||
Dates: |
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Volume: | Vol.65 | ||||
Number: | Part 3 | ||||
Number of Pages: | 9 | ||||
Page Range: | pp. 291-299 | ||||
DOI: | 10.1107/S0108768109011057 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
Data sourced from Thomson Reuters' Web of Knowledge
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