Synthesis, crystal structure and temperature-dependent properties of gallogermanate nitrite sodalite |Na8(NO2)2|[GaGeO4]6
Synthesis, crystal structure and temperature-dependent properties of gallogermanate nitrite sodalite |Na8(NO2)2|[GaGeO4]6
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镓亚硝酸方钠石 |Na8(NO2)2|[GaGeO4]6 的合成、晶体结构及温度相关性质
DOI:
10.1016/j.micromeso.2014.10.007
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发表时间:
2014
影响因子:
5.2
通讯作者:
Th. M. Gesing
中科院分区:
文献类型:
--
作者:
I. Poltz;L. Robben;J.-Ch. Buhl;Th. M. Gesing
Na 8 (NO 2) 2|[GaGeO 4] 6 sodalite was synthesized in a two-step process, starting with the formation of gallogermanate basic-hydro-sodalite under mild hydrothermal conditions (1) followed by hydrothermal treatment in concentrated NaNO 2 solution (2). The presence of NO 2− in the sodalite framework was verified by FTIR and Raman spectroscopy. Crystal structure refinements were performed in the space group P 4¯ 3 n from X-ray powder diffraction data using the Rietveld method. a= 915.28 (1) pm, V= 766.8 (1)× 10− 6 pm 3, R B= 1.92%. The nitrogen atoms were refined on the 8e (x, x, x) crystallographic position with ¼ occupancy. Temperature-dependent properties were investigated by TG–DTA and in-situ X-ray powder diffraction. Debye–Anharmonicity model fit evaluation of the thermal expansion coefficient and the temperature-dependent cell volume behavior indicate intra-cage nitrite to nitrate oxidation around 850 K, confirmed by ex-situ FTIR spectroscopy. The sodalite framework decomposition follows around 935 K, resulting in the beryllonite-type NaGaGeO 4.
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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
影响因子:
5.2
作者:
Irma Poltz;Lars Robben;Josef-Christian Buhl;Thorsten M. Gesing
通讯作者:
Thorsten M. Gesing
影响因子:
5.4
作者:
M. Murshed;T. Gesing
通讯作者:
M. Murshed;T. Gesing
DOI:
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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
DOI:
--
发表时间:
1970
期刊:
影响因子:
--
作者:
A. Evans;D. B. Fitchen
通讯作者:
D. B. Fitchen