Synthesis, crystal structure and temperature-dependent behavior of gallogermanate tetrahydroborate sodalite |Na8(BH4)2|[GaGeO4]6
Synthesis, crystal structure and temperature-dependent behavior of gallogermanate tetrahydroborate sodalite |Na8(BH4)2|[GaGeO4]6
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镓锗酸四氢方钠石 |Na8(BH4)2|[GaGeO4]6 的合成、晶体结构及温度依赖性行为
DOI:
10.1016/j.micromeso.2013.02.038
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发表时间:
2013
影响因子:
5.2
通讯作者:
Thorsten M. Gesing
中科院分区:
文献类型:
--
作者:
Irma Poltz;Lars Robben;Josef-Christian Buhl;Thorsten M. Gesing
Tetrahydroborate enclathrated gallogermanate sodalite was successfully synthesized under mild hydrothermal conditions and characterized by X-ray powder diffraction and Fourier transform infrared (FTIR) spectroscopy. The crystal structure was refined in space group P4¯3n using the Rietveld method: a=912.581(1)pm, V=760.0(1)·10−6pm3, RB=0.019. Within the sodalite cage formed by corner-sharing oxygen coordinated gallium and germanium tetrahedra, the hydrogen atoms of the enclathrated BH4−anions were refined on 8e (x, x, x) crystallographic position. The boron–hydrogen distances were restrained to 124.7pm as calculated from the respective bond valence sums. High temperature behavior was investigated using temperature-dependent X-ray diffraction, FTIR and Raman spectroscopy and TG-DTA methods. A two-step sodalite decomposition reaction to the beryllonite analogous phase NaGaGeO4was observed. The temperature-dependent development of the sodalite structural parameters evaluated by Rietveld analysis of the XRD data indicate a beginning transformation of the enclathrated NaBH4at about 528K followed by a decomposition of the sodalite framework starting at about 648K. These findings are confirmed by the results obtained from temperature-dependent Raman and FTIR data evaluation.
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DOI:
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发表时间:
1998
期刊:
影响因子:
--
作者:
T. Gesing;J. Buhl
通讯作者:
J. Buhl
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Buhl;T. Gesing;T. Höfs;C. Rüscher
通讯作者:
C. Rüscher
DOI:
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发表时间:
1994
期刊:
影响因子:
--
作者:
H. Esemann;H. Förster
通讯作者:
H. Förster
影响因子:
5.2
作者:
W. H. Baur;R. Fischer
通讯作者:
W. H. Baur;R. Fischer
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
T. Nenoff;W. Harrison;T. E. Gier;N. Keder;Charlotte M. Zaremba;V. Srdanov;J. M. Nicol;G. Stucky
通讯作者:
G. Stucky