Year-end Sale % OFF 
Abstract
Infrared spectra of α-Bi2Te4O11, β-Bi2Te4O11, Bi2Te2O7, and Bi2TeO5, have been compared and analyzed. The bands in the region of 620–400 cm−1 correspond to the stretching modes of the bismuth–oxygen framework, while those in the region of 800–620 cm−1 belong to the stretching vibrations of the Te–O bonds. TeO3 polyhedra of trigonal–pyramidal configuration with equal bond lengths (within 0.02 nm) have been found in bismuth tellurites. The largest deformation of TeO3 has been observed in Bi2TeO5 as compared to the other bismuth tellurites investigated in this study. Connected TeO3 polyhedra form Te2O5 groups in the structure of α-Bi2Te4O11. The relation between the frequency of the asymmetric stretching mode and the length of Bi–O bond is linear for Bi2TeO5 and nonlinear for α-Bi2Te4O11 and α-Bi2O3.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
