<p><b>六氟合鎳(IV)酸鉀</b>是一種鎳的配合物，化學式為<span>K<span><br>2</span>NiF<span><br>6</span></span>。它可由氟氣氟化氯化鉀和二氯化鎳的混合物（2：1）製得。六氟合鎳(IV)酸鉀易與水反應，並放出氧氣。但可溶於無水氟化氫生成亮紅色溶液。在350℃以上真空加熱分解：
</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ 3K_{2}NiF_{6}{\xrightarrow {\Delta }}2K_{3}NiF_{6}+NiF_{2}+F_{2}}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\rm {\ 3K_{2}NiF_{6}{\xrightarrow {\Delta }}2K_{3}NiF_{6}+NiF_{2}+F_{2}}}}</annotation>
  </semantics></math></span></span></dd></dl><p>六氟合鎳(IV)酸鉀是強氧化劑，可用它氧化五氟化氯和五氟化溴，生成<span>ClF<span>+<br>6</span></span>和<span>BrF<span>+<br>6</span></span>，這一點只有二氟化氪也能做到。
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<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ K_{2}NiF_{6}+5AsF_{5}+XF_{5}{\xrightarrow {aHF}}XF_{6}AsF_{6}+Ni(AsF_{6})_{2}+2KAsF_{6}}}}">
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  </semantics></math></span></span></dd>
<dd>（X為Cl或Br，無水氟化氫，-60℃）</dd></dl><h2><span id=".E5.8F.82.E8.80.83.E8.B5.84.E6.96.99"></span><span id="参考资料">參考資料</span></h2>

<p><br></p>
**六氟合鎳 (IV) 酸鉀**是一種鎳的配合物，化學式為 K 
2NiF 
6。它可由氟氣氟化氯化鉀和二氯化鎳的混合物（2：1）製得。六氟合鎳 (IV) 酸鉀易與水反應，並放出氧氣。但可溶於無水氟化氫生成亮紅色溶液。在 350℃以上真空加熱分解：

　
: ${\rm {\ 3K_{2}NiF_{6}{\xrightarrow {\Delta }}2K_{3}NiF_{6}+NiF_{2}+F_{2}}}$

六氟合鎳 (IV) 酸鉀是強氧化劑，可用它氧化五氟化氯和五氟化溴，生成 ClF+ 
6 和 BrF+ 
6，這一點只有二氟化氪也能做到。

　
: ${\rm {\ K_{2}NiF_{6}+5AsF_{5}+XF_{5}{\xrightarrow {aHF}}XF_{6}AsF_{6}+Ni(AsF_{6})_{2}+2KAsF_{6}}}$

　
: （X 為 Cl 或 Br，無水氟化氫，-60℃）

## 參考資料
17218-47-2