Abstract
The structure of K0.92(2) Zn0.08(2) H1.92(2) (PO4) was determined using single-crystal X-ray diffraction. The crystal structure of the Zn-KDP belonged to the tetragonal space group \( \mathrm{I}\overline{4}2\mathrm{d} \), with cell parameters of a = b = 7.4487(5) Å and c = 6.9703(5) Å, 386.73(5) Å3, Z = 4, and R = 0.023. Zn2+ ions were used as substitutes for K+ ions with hydrogen vacancy. The Zn-KDP single crystals were submitted to further Raman, infrared, and 1H NMR studies to investigate chemical group functionalisation, possible bonding between the organic and inorganic materials, and partial substitution of K+ by Zn2+. The latter partial substitution was confirmed by the deviation of IR frequencies for O–H stretching, the variation of IR and Raman frequencies for stretching and bending vibrations ν(PO4) of H2PO4, and the appearance of additional Raman (147, 386 and 481 cm−1) vibrational bands. Electrical conductivity measurements were performed on polycrystalline pellets of Zn-KDP and pure KDP at room temperatures (RT) of up to 473K. In both cases, a conductivity jump close to 453K was observed, and a stronger increase of conductivity was measured.
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The authors wish to express their gratitude to Mr. Anouar Smaoui and Mrs Hanen Ben Salem from the Faculty of Science, Sfax, Tunisia for their constructive proofreading and language polishing services. Thanks are also due to the Raman spectroscopy Unit at FSS Sfax for their valuable help with the measuring of Raman spectra.
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Appendix A. Supplementary data
Appendix A. Supplementary data
CSD-423866 contains the supplementary crystallographic data for this paper. CIF and structure factor deposits may be made using online service: http://journals.iucr.org/services/cif/checkcif.html, or from the Fachinformationszentrum Karlsruhe (FIZ) 76344 Eggenstein-Leopoldshafen, Germany; tel: +49-(0)7247/808-205; or e-mail: crysdata@fiz-karlsruhe.de
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Ettoumi, H., Brahim, F.B., Toumi, M. et al. Synthesis, crystal structure, and spectroscopic study of K0.92(2) Zn0.08(2) H1.92(2) (PO4) (Zn-KDP). Ionics 19, 193–200 (2013). https://doi.org/10.1007/s11581-012-0824-7
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DOI: https://doi.org/10.1007/s11581-012-0824-7