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Synthesis and characterization of the new tin borate SnB8O11(OH)4
- Schönegger, Sandra, Wurst, Klaus, Heymann, Gunter, Schaur, Andreas, Saxer, Andreas, Johrendt, Dirk, Huppertz, Hubert
- Zeitschrift für Naturforschung 2018 v.73 no.5 pp. 337-348
- X-ray diffraction, borates, cations, crystallization, hydrogen bonding, spectroscopy, temperature, tin
- A new tin(II) borate with the composition SnB₈O₁₁(OH)₄ was synthesized by a simple hydrothermal process. It crystallizes in the centrosymmetric monoclinic space group P2₁/n (no. 14) with the lattice parameters a=790.1(1), b=1402.2(2), c=994.8(1) pm, and β=90.40(5)° (Z=4). The new compound SnB₈O₁₁(OH)₄ is isotypic to PbB₈O₁₁(OH)₄ and isostructural to BaB₈O₁₁(OH)₄. The borate layers are built up from fundamental building blocks (FBBs) with the composition [B₈O₁₁(OH)₄]²⁻. Four of these FBBs form a nine-membered ring wherein the Sn²⁺ cations are located. These boron-oxygen layers are further connected by O–H···O hydrogen bond interactions. The characterization of SnB₈O₁₁(OH)₄ is based on single-crystal X-ray diffraction data, vibrational spectroscopy, DFT calculations, and thermoanalytical investigations including high temperature powder XRD.