The New High‐Pressure Sodium Tetraborate HP‐Na2B4O7 |
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| Authors: | Stephanie C Neumair Gerhard Sohr Stefan Vanicek Klaus Wurst Reinhard Kaindl Univ‐Prof Dr Hubert Huppertz |
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| Institution: | 1. Institut für Allgemeine, Anorganische und Theoretische Chemie, Leopold‐Franzens‐Universit?t Innsbruck, Innrain 52a, 6020 Innsbruck, Austria;2. MATERIALS – Institut für Oberfl?chentechnologie und Photonik, JOANNEUM RESEARCH Forschungsgesellschaft mbH, Leobnerstra?e 94, 8117 Niklasdorf, Austria |
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| Abstract: | The new polymorph of sodium tetraborate HP‐Na2B4O7 was synthesized under high‐pressure / high‐temperature conditions of 6 GPa and 1000 °C in a multianvil apparatus with a Walker‐type module. HP‐Na2B4O7 crystallizes with nine formula units per cell in the trigonal chiral space groups P3221 or P3121. The parameters are a = 765.5(2), c = 2142.3(4) pm, V = 1.0872(3) nm3, R1 = 0.0581, and wR2 = 0.0809 (all data). The crystal structure of HP‐Na2B4O7 is built up from interconnected “sechser” rings of alternating corner‐sharing BO3 and BO4 groups. |
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| Keywords: | High‐pressure chemistry Multianvil Structure elucidation Sodium tetraborate |
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