<p><b>二硫代亞鉻酸鉀</b>是一種無機化合物，化學式為KCrS<sub>2</sub>。
</p>
<h2><span id=".E5.88.B6.E5.A4.87.E5.8F.8A.E6.80.A7.E8.B4.A8"></span><span id="制备及性质">製備及性質</span></h2>
<p>它可由碳酸鉀、三氧化二鉻在硫化氫氣氛中加熱反應得到：
</p>
<dl><dd><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathsf {K_{2}CO_{3}+Cr_{2}O_{3}+4H_{2}S\ {\xrightarrow {800-900^{o}C}}\ 2KCrS_{2}+CO_{2}+4H_{2}O}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {K_{2}CO_{3}+Cr_{2}O_{3}+4H_{2}S\ {\xrightarrow {800-900^{o}C}}\ 2KCrS_{2}+CO_{2}+4H_{2}O}}}</annotation>
  </semantics></math></span></span></dd></dl></dd></dl><p>在800~900 °C加熱鉻、硫和碳酸鉀的混合物，或者重鉻酸鉀在氫氣-硫化氫氣氛中於600 °C還原，都能得到KCrS<sub>2</sub>。</p><p>它是四方晶系的晶體，空間群R<u style="text-decoration: overline;">3</u>m，晶胞參數a=0.3618 nm, c=2.116 nm。它是極易潮解的鐵磁性物質，居里點112 K。</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>

<h2><span id=".E6.8B.93.E5.B1.95.E9.98.85.E8.AF.BB"></span><span id="拓展阅读">拓展閱讀</span></h2>
<p><small>
</small></p><small><ul><li><cite class="citation journal">A. V. Ushakov, D. A. Kukusta, A. N. Yaresko, D. I. Khomskii. Magnetism of layered chromium sulfides <span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M}">
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  </semantics></math></span></span>CrS<span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {}_{2}}">
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  </semantics></math></span></span> (<span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M=\mathrm {Li} }">
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  </semantics></math></span></span>, Na, K, Ag, and Au): A first-principles study. Physical Review B. 2013-01-14, <b>87</b> (1): 014418 <span> [<span>2019-02-05</span>]</span>. <span title="數位物件識別號">doi:10.1103/PhysRevB.87.014418</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3A%E4%BA%8C%E7%A1%AB%E4%BB%A3%E4%BA%9A%E9%93%AC%E9%85%B8%E9%92%BE&amp;rft.atitle=Magnetism+of+layered+chromium+sulfides+MATH+RENDER+ERRORCrSMATH+RENDER+ERROR+%28MATH+RENDER+ERROR%2C+Na%2C+K%2C+Ag%2C+and+Au%29%3A+A+first-principles+study&amp;rft.au=A.+V.+Ushakov%2C+D.+A.+Kukusta%2C+A.+N.+Yaresko%2C+D.+I.+Khomskii&amp;rft.date=2013-01-14&amp;rft.genre=article&amp;rft.issue=1&amp;rft.jtitle=Physical+Review+B&amp;rft.pages=014418&amp;rft.volume=87&amp;rft_id=https%3A%2F%2Flink.aps.org%2Fdoi%2F10.1103%2FPhysRevB.87.014418&amp;rft_id=info%3Adoi%2F10.1103%2FPhysRevB.87.014418&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal"><span> </span></span></li></ul></small><small></small><p><small></small>
</p>
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**二硫代亞鉻酸鉀**是一種無機化合物，化學式為 KCrS2。

## 製備及性質

它可由碳酸鉀、三氧化二鉻在硫化氫氣氛中加熱反應得到：

　
: : ${\mathsf {K_{2}CO_{3}+Cr_{2}O_{3}+4H_{2}S\ {\xrightarrow {800-900^{o}C}}\ 2KCrS_{2}+CO_{2}+4H_{2}O}}$

在 800~900 °C 加熱鉻、硫和碳酸鉀的混合物，或者重鉻酸鉀在氫氣 - 硫化氫氣氛中於 600 °C 還原，都能得到 KCrS2。

它是四方晶系的晶體，空間群 R3m，晶胞參數 a=0.3618 nm, c=2.116 nm。它是極易潮解的鐵磁性物質，居里點 112 K。

## 參考文獻

## 拓展閱讀

* A. V. Ushakov, D. A. Kukusta, A. N. Yaresko, D. I. Khomskii. Magnetism of layered chromium sulfides $M$ CrS ${}_{2}$ ( $M=\mathrm {Li} $ , Na, K, Ag, and Au): A first-principles study. Physical Review B. 2013-01-14, **87** (1): 014418 [2019-02-05]. doi:10.1103/PhysRevB.87.014418.
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