查看“︁氟铝酸钠”︁的源代码

{{chembox
|   NameEn = Sodium hexafluoroaluminate
|   ImageFile = Cryolite-unit-cell-3D-balls.png
|   ImageSize = 200px
|   ImageName = 氟铝酸钠
|   OtherNames = 冰晶石；氟化铝钠；六氟合铝酸钠
| Section1 = {{Chembox Identifiers
| CASNo = 13775-53-6
| CASNo_Ref = {{cascite|correct|CAS}}
|  ChemSpiderID_Ref  = {{chemspidercite|correct|chemspider}}|  ChemSpiderID  =  11431435
|  InChI1  =  1/Al.6FH.3Na/h;6*1H;;;/q+3;;;;;;;3*+1/p-6/rAlF6.3Na/c2-1(3,4,5,6)7;;;/q-3;3*+1
|  InChIKey1  =  REHXRBDMVPYGJX-ZWHJLPLDAC
|  ChEBI_Ref  = {{ebicite|correct|EBI}}|  ChEBI  =  39289
|  StdInChI_Ref  = {{stdinchicite|correct|chemspider}}|  StdInChI  =  1S/Al.6FH.3Na/h;6*1H;;;/q+3;;;;;;;3*+1/p-6
|  StdInChIKey_Ref  = {{stdinchicite|correct|chemspider}}|  StdInChIKey  =  REHXRBDMVPYGJX-UHFFFAOYSA-H
|  SMILES  =  [Na+].[Na+].[Na+].F[Al-3](F)(F)(F)(F)F
|  PubChem  =  159692
}}
| Section2 = {{Chembox Properties
|   Formula = Na<sub>3</sub>AlF<sub>6</sub>
|   MolarMass = 209.941 <ref name=" CRC Handbook of Chemistry and Physics 97th Edition "> {{Cite book |  date = 2016-06-24  |  title = CRC Handbook of Chemistry and Physics 97th Edition | accessdate = 2018-01-07 | pages = 4-86 | language = 英语 | ISBN = 1-4987-5428-7  }} </ref>
|   Appearance = 无色单斜晶体或白色粉末<ref name=" CRC Handbook of Chemistry and Physics 97th Edition "/>
|   Density = 2.97 g/cm³ (固)<ref name=" CRC Handbook of Chemistry and Physics 97th Edition "/>
|   Solubility = 难溶于水<ref name=" CRC Handbook of Chemistry and Physics 97th Edition "/>
|   MeltingPt = 1013 °C<ref name=" CRC Handbook of Chemistry and Physics 97th Edition "/>
|   BoilingPt = 分解
|   EvaporationRate = 
|   VaporPressure = 
  }}
| Section3 = {{Chembox Structure
| CrystalStruct = [[单斜晶系]]，560℃以上转化为[[立方晶系]]<ref name=" CRC Handbook of Chemistry and Physics 97th Edition "/>
| Coordination =
| MolShape = }}
| Section7 = {{Chembox Hazards
|   EUClass = 未列出
  }}
}}

'''氟铝酸钠'''，為'''[[冰晶石]]'''的主要成份，化学式{{化學式|鈉|3|鋁|氟|6|link=}}。

==性质==
氟铝酸钠是一种无色[[单斜]]晶体，常因含有杂质而呈灰白色、淡黄色、淡红色甚至黑色。常呈不可分割的致密块体，有玻璃光泽。微溶于水，水溶液呈酸性。遇[[硫酸]]放出剧毒的[[氟化氢]]气体。<ref name="zghg">中国化工产品大全 上卷，Bc181 冰晶石，页175</ref>

==制备==
1、[[氟化钠]]与[[氟化铝]]进行反应，再经过滤、干燥，制得成品。
:<math>\rm \ 3NaF+AlF_3\rightarrow Na_3AlF_6</math>

2、干法 气态[[氟化氢]]在400～700°C通过[[氢氧化铝]]，生成[[氟铝酸]]，然后与[[碳酸钠]]高温反应，再经过滤和烘干得冰晶石成品。<ref name="zghg" />
:<math>\rm \ 6HF+Al(OH)_3\rightarrow AlF_3\cdot 3HF+3H_2O</math>
:<math>\rm \ 2AlF_3\cdot 3HF + 3Na_2CO_3\rightarrow 2Na_3AlF_6+3CO_2\uparrow +3H_2O</math>

==用途==
氟铝酸钠主要用作电解炼[[铝]]时的[[助熔剂]]、农作物的[[杀虫剂]]、[[搪瓷]][[釉药]]的熔融剂及乳白剂。也用于制造乳白玻璃，以及[[铝合金]]、[[铁合金]]和[[沸腾钢]]生产中的[[电解液]]及[[砂轮]]的配料等。<ref name="zghg" />

==参考资料==
{{reflist}}

[[Category:钠化合物]]
[[Category:氟铝酸盐]]