Synthesis and thermal stability of perovskite alkali metal strontium borohydrides
© 2016 The Royal Society of Chemistry. Three new perovskite-type bimetallic alkali metal strontium borohydride compounds, a-MSr(BH4)3 (M = K, Rb, Cs), have been synthesized and investigated by in situ synchrotron radiation powder X-ray diffraction, thermal analysis combined with mass spectrometry an...
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| Format: | Journal Article |
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R S C Publications
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/70795 |
| _version_ | 1848762304002260992 |
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| author | Moller, Kasper Ley, M. Schouwink, P. Cerný, R. Jensen, T. |
| author_facet | Moller, Kasper Ley, M. Schouwink, P. Cerný, R. Jensen, T. |
| author_sort | Moller, Kasper |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2016 The Royal Society of Chemistry. Three new perovskite-type bimetallic alkali metal strontium borohydride compounds, a-MSr(BH4)3 (M = K, Rb, Cs), have been synthesized and investigated by in situ synchrotron radiation powder X-ray diffraction, thermal analysis combined with mass spectrometry and Sievert's measurements. The bimetallic borohydrides were synthesized via an addition reaction between Sr(BH4)2 and MBH4 (M = K, Rb, Cs) by mechanochemical treatment. The Sr(BH4)2-NaBH4 system, which was treated in a similar manner, did not undergo reaction. All three a-MSr(BH4)3 compounds crystallize in the orthorhombic crystal system at room temperature: KSr(BH4)3 (P21cn), a = 7.8967(6), b = 8.2953(7), and c = 11.508(1) Å (V = 753.82(12) Å3). RbSr(BH4)3 (Pbn21), a = 8.0835(3), b = 8.3341(4), and c = 11.6600(5) Å (V = 785.52(6) Å3). CsSr(BH4)3 (P22121), a = 8.2068(9), b = 8.1793(9), and c = 6.0761(4) Å (V = 407.87(7) Å3). All three compounds are perovskite-type 3D framework structures built from distorted [Sr(BH4)6] octahedra. High-temperature polymorphs are identified to form at 258, 220 and 150°C for MSr(BH4)3, M = K, Rb and Cs, respectively. The new compounds are thermally stable and decompose at T > 360°C into SrB6, SrH2 and MBH4 (M = K, Rb, Cs). |
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| format | Journal Article |
| id | curtin-20.500.11937-70795 |
| institution | Curtin University Malaysia |
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| last_indexed | 2025-11-14T10:45:26Z |
| publishDate | 2015 |
| publisher | R S C Publications |
| recordtype | eprints |
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| spelling | curtin-20.500.11937-707952018-12-13T09:33:20Z Synthesis and thermal stability of perovskite alkali metal strontium borohydrides Moller, Kasper Ley, M. Schouwink, P. Cerný, R. Jensen, T. © 2016 The Royal Society of Chemistry. Three new perovskite-type bimetallic alkali metal strontium borohydride compounds, a-MSr(BH4)3 (M = K, Rb, Cs), have been synthesized and investigated by in situ synchrotron radiation powder X-ray diffraction, thermal analysis combined with mass spectrometry and Sievert's measurements. The bimetallic borohydrides were synthesized via an addition reaction between Sr(BH4)2 and MBH4 (M = K, Rb, Cs) by mechanochemical treatment. The Sr(BH4)2-NaBH4 system, which was treated in a similar manner, did not undergo reaction. All three a-MSr(BH4)3 compounds crystallize in the orthorhombic crystal system at room temperature: KSr(BH4)3 (P21cn), a = 7.8967(6), b = 8.2953(7), and c = 11.508(1) Å (V = 753.82(12) Å3). RbSr(BH4)3 (Pbn21), a = 8.0835(3), b = 8.3341(4), and c = 11.6600(5) Å (V = 785.52(6) Å3). CsSr(BH4)3 (P22121), a = 8.2068(9), b = 8.1793(9), and c = 6.0761(4) Å (V = 407.87(7) Å3). All three compounds are perovskite-type 3D framework structures built from distorted [Sr(BH4)6] octahedra. High-temperature polymorphs are identified to form at 258, 220 and 150°C for MSr(BH4)3, M = K, Rb and Cs, respectively. The new compounds are thermally stable and decompose at T > 360°C into SrB6, SrH2 and MBH4 (M = K, Rb, Cs). 2015 Journal Article http://hdl.handle.net/20.500.11937/70795 10.1039/c5dt03590b R S C Publications restricted |
| spellingShingle | Moller, Kasper Ley, M. Schouwink, P. Cerný, R. Jensen, T. Synthesis and thermal stability of perovskite alkali metal strontium borohydrides |
| title | Synthesis and thermal stability of perovskite alkali metal strontium borohydrides |
| title_full | Synthesis and thermal stability of perovskite alkali metal strontium borohydrides |
| title_fullStr | Synthesis and thermal stability of perovskite alkali metal strontium borohydrides |
| title_full_unstemmed | Synthesis and thermal stability of perovskite alkali metal strontium borohydrides |
| title_short | Synthesis and thermal stability of perovskite alkali metal strontium borohydrides |
| title_sort | synthesis and thermal stability of perovskite alkali metal strontium borohydrides |
| url | http://hdl.handle.net/20.500.11937/70795 |