Schaefer, Martin J. and Jantz, Stephan G. and Pielnhofer, Florian and Hoeppe, Henning A. (2019) The very first normal-pressure tin borate Sn3B4O9, and the intermediate Sn-2[B7O12]F. DALTON TRANSACTIONS, 48 (28). pp. 10398-10402. ISSN 1477-9226, 1477-9234
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Aside from amorphous phases, only a single crystalline tin borate had been synthesised so far under high pressure. In this work, we present the very first crystalline ternary tin borate Sn3B4O9 synthesised under ambient pressure by decomposition of Sn-3[B3O7]F above 500 degrees C. The crystal structure of Sn3B4O9 (P2(1)/c, Z = 4, a = 768.07(3) pm, b = 1206.78(4) pm, c = 924.96(3) pm, beta = 101.847(1)degrees, 10 550 data, 147 parameters, R-1 = 0.028) determined by single-crystal X-ray diffraction comprises open layered borate polyanions with Sn(ii) ions in-between showing the presence of a stereochemically active lone pair. Sn3B4O9 was further characterized by DFT calculations and vibrational spectroscopy. Its optical band gap was calculated to approx. 3.5(1) eV. Tin borate was gained by thermal decomposition of Sn[B2O3F2] via a further new tin borate fluoride Sn-2[B7O12]F (C2/c, Z = 8, a = 1037.99(2) pm, b = 859.78(2) pm, c = 2370.71(8) pm, beta = 93.5650(10)degrees, 2674 data, 199 parameters, R-1 = 0.045).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EFFECTIVE IONIC-RADII; CRYSTAL-STRUCTURE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Apr 2020 10:04 |
| Last Modified: | 02 Apr 2020 10:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26597 |
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