查看“︁四氟合铍酸铵”︁的源代码

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| ImageFile = Unit_cell_of_ammonium_tetrafluoroberyllate.png
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| OtherNames = 氟铍酸铵
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|   CASNo = 14874-86-3
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|  N=2 | H=8 | Be=1 | F=4
|   Appearance = 白色固体<ref name="brauer" />
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'''四氟合铍酸铵'''是一种[[配位化合物]]，化学式为(NH<sub>4</sub>)<sub>2</sub>BeF<sub>4</sub>。它可由[[氟化铵]]和[[氢氧化铍]]反应制得：<ref name="brauer">[[Georg Brauer]] (Hrsg.), unter Mitarbeit von [[Marianne Baudler]] u.&nbsp;a.: ''Handbuch der Präparativen Anorganischen Chemie.'' 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 243.</ref>
:<math>\mathrm{4 \ NH_4 F + Be(OH)_2 \longrightarrow (NH_4 )_2 [BeF_4] + 2 \ NH_4 OH}</math>
它可以以[[正交晶系]]''Pnma''空间群结晶，其晶体结构中含有四面体构型的铵根离子及[BeF<sub>4</sub>]<sup>2−</sup>。<ref>A.&nbsp;Garg, S.&nbsp;Srivastava: ''Ammonium Tetrafluoroberyllate(II)''. In: ''[[Acta Crystallographica]]'', '''1979''', ''B35'', S.&nbsp;1429–1432 ({{DOI|10.1107/S0567740879006609}}).</ref>它在230~260 °C分解为NH<sub>4</sub>BeF<sub>3</sub>，在270 °C以上分解为BeF<sub>2</sub>。<ref>Pallavi Ghalsasi and Prasanna S. Ghalsasi. Single Crystal X-Ray Structure of BeF<sub>2</sub>: α-Quartz. Inorg. Chem. 2011, 50, 1, 86–89. {{doi|10.1021/ic101248g}}.</ref>
==参考文献==
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[[Category:铵盐]]
[[Category:氟铍酸盐]]