<p><b>碘酸銣</b>是銣的碘酸鹽，化學式 RbIO<sub>3</sub>。
</p>


<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>碘酸銣可以由碳酸銣和五氧化二碘反應而成。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {Rb2CO3 + I2O5 -&gt; 2RbIO3 + CO2 ^}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\ce {Rb2CO3 + I2O5 -&gt; 2RbIO3 + CO2 ^}}}</annotation>
  </semantics></math></span></span></dd></dl><h2><span id=".E6.80.A7.E8.B4.A8"></span><span id="性质">性質</span></h2>
<h3><span id=".E7.89.A9.E7.90.86.E6.80.A7.E8.B4.A8"></span><span id="物理性质">物理性質</span></h3>
<p>碘酸銣是三方晶系的，空間群 R<u style="text-decoration: overline;">3</u>m (No. 160)，晶格參數 a = 641.3 pm, c = 789.2 pm。它的晶體結構和碘酸鉀一樣。碘酸銣易溶於鹽酸，且會變黃。</p>
<h3><span id=".E5.8C.96.E5.AD.A6.E6.80.A7.E8.B4.A8"></span><span id="化学性质">化學性質</span></h3>
<p>碘酸銣加熱分解成碘化銣和氧氣：</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {2RbIO3 -&gt; 2RbI + 3O2 ^}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\ce {2RbIO3 -&gt; 2RbI + 3O2 ^}}}</annotation>
  </semantics></math></span></span></dd></dl><p>在熱的碘酸銣和氫氧化銣中通入氯氣，可以得到高碘酸銣。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {RbIO3 + 2RbOH + Cl2 -&gt; RbIO4 + 2RbCl + H2O}}}">
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          <mtext>RbOH</mtext>
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          <mo stretchy="false">⟶<!-- ⟶ --></mo>
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            <mtext>RbIO</mtext>
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          <mtext>RbCl</mtext>
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    <annotation encoding="application/x-tex">{\displaystyle {\ce {RbIO3 + 2RbOH + Cl2 -&gt; RbIO4 + 2RbCl + H2O}}}</annotation>
  </semantics></math></span></span></dd></dl><p>碘酸銣和氫氟酸反應，形成二氟碘酸銣，有著正交晶系。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {RbIO3 + 2HF -&gt; 2RbF2IO2 + H2O}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\ce {RbIO3 + 2HF -&gt; 2RbF2IO2 + H2O}}}</annotation>
  </semantics></math></span></span></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>
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**碘酸銣**是銣的碘酸鹽，化學式 RbIO3。

## 製備

碘酸銣可以由碳酸銣和五氧化二碘反應而成。

　
: ${\ce {Rb2CO3 + I2O5 -> 2RbIO3 + CO2 ^}}$

## 性質

### 物理性質

碘酸銣是三方晶系的，空間群 R3m (No. 160)，晶格參數 a = 641.3 pm, c = 789.2 pm。它的晶體結構和碘酸鉀一樣。碘酸銣易溶於鹽酸，且會變黃。

### 化學性質

碘酸銣加熱分解成碘化銣和氧氣：

　
: ${\ce {2RbIO3 -> 2RbI + 3O2 ^}}$

在熱的碘酸銣和氫氧化銣中通入氯氣，可以得到高碘酸銣。

　
: ${\ce {RbIO3 + 2RbOH + Cl2 -> RbIO4 + 2RbCl + H2O}}$

碘酸銣和氫氟酸反應，形成二氟碘酸銣，有著正交晶系。

　
: ${\ce {RbIO3 + 2HF -> 2RbF2IO2 + H2O}}$

## 參考資料
13446-76-9