<p><b>硒化鉀</b>是一種無機化合物，由硒和鉀，為一種氫硒酸鹽，其化學式為K<sub>2</sub>Se。具吸濕性，朝解硒析出，故變紅色。
</p>
<h2><span id=".E5.88.B6.E5.82.99"></span><span id="制備">制備</span></h2>
<p>使硒和鉀反應即可製得，將此反應在液氨中反應時，可製得純度較高的硒化鉀。
</p>
<h2><span id=".E6.99.B6.E9.AB.94.E7.B5.90.E6.A7.8B"></span><span id="晶體結構">晶體結構</span></h2>
<p>硒化鉀晶體結構為<b>立方晶系</b>，屬於反螢石型結構，空間群為<span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle Fm{\bar {3}}m}">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mi>F</mi>
        <mi>m</mi>
        <mrow class="MJX-TeXAtom-ORD">
          <mrow class="MJX-TeXAtom-ORD">
            <mover>
              <mn>3</mn>
              <mo stretchy="false">¯<!-- ¯ --></mo>
            </mover>
          </mrow>
        </mrow>
        <mi>m</mi>
      </mstyle>
    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle Fm{\bar {3}}m}</annotation>
  </semantics></math></span></span>，每單位晶胞有4個單位。
</p>
<h2><span id=".E5.8F.83.E8.80.83.E6.96.87.E7.8D.BB"></span><span id="參考文獻">參考文獻</span></h2>

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**硒化鉀**是一種無機化合物，由硒和鉀，為一種氫硒酸鹽，其化學式為 K2Se。具吸濕性，朝解硒析出，故變紅色。

## 制備

使硒和鉀反應即可製得，將此反應在液氨中反應時，可製得純度較高的硒化鉀。

## 晶體結構

硒化鉀晶體結構為**立方晶系**，屬於反螢石型結構，空間群為 $Fm{\bar {3}}m$ ，每單位晶胞有 4 個單位。

## 參考文獻
1312-74-9