<p><b>三矽酸鎂</b>五水合物，化學式Mg<sub>2</sub>Si<sub>3</sub>O<sub>8</sub>·5H<sub>2</sub>O。
</p>


<h2><span id=".E6.80.A7.E8.B4.A8"></span><span id="性质">性質</span></h2>
<p>三矽酸鎂是一種無臭、無味、無砂礫感的白色細粉，略有吸濕性，不溶於水、乙醇和乙醚，易受無機酸分解。
</p>
<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>泡花鹼與硫酸鎂經預處理後進行反應生成三矽酸鎂沉澱，再經漂洗、過濾、乾燥、粉碎得到三矽酸鎂成品。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\rm {\ 2Na_{2}O\cdot 3SiO_{2}\cdot 5H_{2}O+2MgSO_{4}\rightarrow Mg_{2}Si_{3}O_{8}\cdot 5H_{2}O+}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\rm {\ 2Na_{2}O\cdot 3SiO_{2}\cdot 5H_{2}O+2MgSO_{4}\rightarrow Mg_{2}Si_{3}O_{8}\cdot 5H_{2}O+}}}</annotation>
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    <annotation encoding="application/x-tex">{\displaystyle {\rm {\ 2Na_{2}SO_{4}}}}</annotation>
  </semantics></math></span></span></dd></dl><h2><span id=".E7.94.A8.E9.80.94"></span><span id="用途">用途</span></h2>
<p>三矽酸鎂在醫藥上用於制抗酸藥，能中和胃酸和保護潰瘍面，作用緩慢而持久。
</p>
<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>
**三矽酸鎂**五水合物，化學式 Mg2Si3O8·5H2O。

## 性質

三矽酸鎂是一種無臭、無味、無砂礫感的白色細粉，略有吸濕性，不溶於水、乙醇和乙醚，易受無機酸分解。

## 製備

泡花鹼與硫酸鎂經預處理後進行反應生成三矽酸鎂沉澱，再經漂洗、過濾、乾燥、粉碎得到三矽酸鎂成品。

　
: ${\rm {\ 2Na_{2}O\cdot 3SiO_{2}\cdot 5H_{2}O+2MgSO_{4}\rightarrow Mg_{2}Si_{3}O_{8}\cdot 5H_{2}O+}}$ ${\rm {\ 2Na_{2}SO_{4}}}$

## 用途

三矽酸鎂在醫藥上用於制抗酸藥，能中和胃酸和保護潰瘍面，作用緩慢而持久。

## 參考資料
14987-04-3