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Temperature dependent high resolution neutron diffraction studies demonstrate that the sequence and temperatures of the crystallographic phase transitions in NaTaO3 are not impacted by doping with 1% K to form Na0.99K0.01TaO3. Rietveld analysis of the neutron diffraction data shows the structural transitions to be:Pbnm↔723 KCmcm↔803 KP4/nbm↔893 KPm3¯m. The two orthorhombic polymorphs, Pbnm and Cmcm,...
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