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Journal of Current Science and Technology

ISSN 2630-0656 (Online)

Synthesis and structural characterization of (Na6F(H2O)18[(VO4)2]·2H3O·2HF

  • Chana Panyanon, Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-McMa), Faculty of Science and Technology, Thammasat University, Pathumthani 12121, Thailand, Corresponding author; Email: kc@tu.ac.th
  • Winya Dungkaew, Department of Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, Thailand
  • Kittipong Chainok, Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-McMa), Faculty of Science and Technology, Thammasat University, Pathumthani 12121, Thailand


A new sodium vanadate solid comprising hexameric Na6 cluster, (Na6F(H2O)18)[(VO4)2]·2H3O·2HF (1), was synthesized for the first time.  Material 1 was characterized by single crystal X-ray diffraction (SC-XRD), powder X-ray diffraction (PXRD), infrared spectroscopy (IR), and thermogravimetric analysis (TGA).  1 crystallizes in the cubic system with space group Fd-3c and the crystal comprises two orthovanadate (VO4) units, one hexameric sodium [Na6F(H2O)18] cluster, two hydrogen fluoride (HF) molecules, and two oxonium (H3O) cations.  In the crystal, the four moieties interact with each other through extensive O−H∙∙∙O and O−H∙∙∙F hydrogen bonding interactions to give rise to a three-dimensional supramolecular architecture.  The discrete structure of 1 can be transformed to an infinite three-dimensional network of β-NaVO3 phase via thermally induced solid-state reactivity.

Keywords: hexanuclear, hexameric Na6 cluster, oxonium, single crystal to single crystal transformation, sodium cluster, vanadate

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DOI: 10.14456/jcst.2021.6


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