<p><b>七氟合鏷(V)酸鉀</b>是一種無機化合物，化學式為K<sub>2</sub>PaF<sub>7</sub>。它可由五氧化二鏷和氫氟酸反應，向溶液中加入氟化鉀後製得，該反應也會同時生成<span data-orig-title="六氟合镤(V)酸钾" data-lang-code="en" data-lang-name="英語" data-foreign-title="Гексафторопротактинат(V) калия"><span>六氟合鏷(V)酸鉀</span></span>。向含有Pa<sup>V</sup>和K<sup>+</sup>的17 mol/L HF中加入過量丙酮，也可沉澱出K<sub>2</sub>PaF<sub>7</sub>。它是單斜晶系晶體，空間群<i>C</i>2/<i>c</i>，晶胞參數a=13.675 Å，b=6.690 Å，c=8.096 Å，β=125.087°。</p>
<h2><span id=".E5.8F.82.E8.80.83.E6.96.87.E7.8C.AE"></span><span id="参考文献">參考文獻</span></h2>

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**七氟合鏷 (V) 酸鉀**是一種無機化合物，化學式為 K2PaF7。它可由五氧化二鏷和氫氟酸反應，向溶液中加入氟化鉀後製得，該反應也會同時生成六氟合鏷 (V) 酸鉀。向含有 PaV 和 K+ 的 17 mol/L HF 中加入過量丙酮，也可沉澱出 K2PaF7。它是單斜晶系晶體，空間群 _C_2/_c_，晶胞參數 a=13.675 Å，b=6.690 Å，c=8.096 Å，β=125.087°。

## 參考文獻
17192-52-8