查看“︁三硅酸镁”︁的源代码

{{chembox
|ImageFile=magnesium trisilicate.png
|ImageSize=120px
|IUPACName=dimagnesium dioxido-bis[(oxido-oxosilyl)oxy]silane
|OtherNames=
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 14987-04-3
| CASNo1_Ref = {{cascite|correct|CAS}}
| CASNo1 = 39365-87-2
| CASNo1_Comment = (monohydrate)
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = FML8G1U0Y3
| UNII1_Ref = {{fdacite|correct|FDA}}
| UNII1 =  C2E1CI501T
| UNII1_Comment = (monohydrate)
| PubChem = 5311266
| ChemSpiderID = 4470779
| ChEMBL = 1200428
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| SMILES = [O-][Si](=O)O[Si]([O-])([O-])O[Si](=O)[O-].[Mg+2].[Mg+2]
| SMILES1 = [Mg++].[Mg++].[O-][Si](=O)O[Si]([O-])([O-])O[Si]([O-])=O
| StdInChI = 1S/2Mg.O8Si3/c;;1-9(2)7-11(5,6)8-10(3)4/q2*+2;-4
| StdInChIKey = GXGAKHNRMVGRPK-UHFFFAOYSA-N}}
|Section2= {{Chembox Properties
|  Formula=Mg<sub>2</sub>O<sub>8</sub>Si<sub>3</sub>
|  MolarMass=260.862
|  Appearance= 白色无味粉末
|  Density=
|  MeltingPt=
|  BoilingPt=
|  Solubility= 难溶于水
|  SolubleOther = 难溶于[[乙醚]]、[[乙醇]]
  }}
|Section3= {{Chembox Hazards
|  MainHazards=
|  FlashPt=
|  Autoignition=
  }}
}}

'''三硅酸镁'''五水合物，化学式Mg<sub>2</sub>Si<sub>3</sub>O<sub>8</sub>·5H<sub>2</sub>O。

==性质==
三硅酸镁是一种无臭、无味、无砂砾感的白色细粉，略有[[吸湿性]]，不溶于水、[[乙醇]]和[[乙醚]]，易受无机酸分解。

==制备==
[[泡花碱]]与[[硫酸镁]]经预处理后进行反应生成三硅酸镁沉淀，再经漂洗、过滤、干燥、粉碎得到三硅酸镁成品。<ref name="zghg">中国化工产品大全 上卷，Bc198 三硅酸镁，页185</ref>
:<math>\rm \ 2Na_2O\cdot 3SiO_2\cdot 5H_2O+2MgSO_4\rightarrow Mg_2Si_3O_8\cdot 5H_2O+</math><math>\rm \ 2Na_2SO_4</math>

==用途==
三硅酸镁在医药上用于制[[抗酸药]]，能中和胃酸和保护溃疡面，作用缓慢而持久。

==参考资料==
{{reflist}}

{{鎂化合物}}

[[Category:镁化合物]]
[[Category:硅酸盐]]
[[Category:缺少物质图片的化学品条目]]