查看“︁七氧化四铽”︁的源代码

{{chembox
| verifiedrevid = 451891832
|   ImageFile = Tetraterbium heptaoxide.jpg
|   ImageName = 氧化铽(III,IV)
|   IUPACName = Tetraterbium heptaoxide
|   OtherNames = 氧化铽(III,IV)
| Section1 = {{Chembox Identifiers
|   CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 12037-01-3
| PubChem = 16211492
| InChI = 1S/7O.4Tb
| SMILES = O=[Tb]O[Tb](=O)O[Tb](=O)O[Tb]=O
  }}
| Section2 = {{Chembox Properties
|   Formula = Tb<sub>4</sub>O<sub>7</sub>
|   MolarMass = 747.6972 g/mol
|   Appearance = 暗棕黑色固体
|   Density = 7.3 g/cm<sup>3</sup>
|   Solubility = 不溶
|   MeltingPt = 分解为[[三氧化二铽|Tb<sub>2</sub>O<sub>3</sub>]]
  }}
| Section3 = {{Chembox Structure
|   MolShape = 
|   Coordination = 
|   CrystalStruct = 
|   Dipole =
  }}
| Section7 = {{Chembox Hazards
|   ExternalMSDS =
|   MainHazards = 氧化剂
  }}
| Section8 = {{Chembox Related
|   OtherAnions =
|   OtherCations = [[三氧化二铽]]<br />[[五氧化二铽]]<br/>[[二氧化铽]]
|   OtherCpds = [[五氧化二铈]]<br />[[七氧化四镨]]
  }}
}}
'''七氧化四铽'''的化学式写作Tb<sub>4</sub>O<sub>7</sub>，它实际上是由[[十二氧化七鋱]]Tb<sub>7</sub>O<sub>12</sub>和[[二十氧化十一鋱]]Tb<sub>11</sub>O<sub>20</sub>组成的[[混合物]]<ref>Gin-ya Adachi, Nobuhito Imanaka. The Binary Rare Earth Oxides. ''Chem. Rev.'', 1998, 98 (4), pp 1479–1514 DOI: 10.1021/cr940055h</ref>。

==性质==
棕褐色[[无定形]]粉末，不溶于水，溶于热浓[[酸]]中生成铽(Ⅲ)盐类。七氧化四铽与1:1浓[[乙酸]]和[[盐酸]]混酸中回流反应半小时，发生[[歧化]]生成[[二氧化铽]]和[[三氯化铽]]。<ref>F. T. Edelmann, P. Poremba, in: ''Synthetic Methods of Organometallic and Inorganic Chemistry'', (W. A. Herrmann, ed.), Vol. 6, Georg Thieme Verlag, Stuttgart, 1997.  ISBN 3-13-103071-2.</ref>
:<math>\rm \ Tb_4O_7 + 6 HCl \rightarrow 2 TbO_2 + 2 TbCl_3 + 3 H_2O</math>

==制备==
[[硝酸铽]]、[[碳酸铽]]或[[硫酸铽]]溶液与[[氢氧化钠]]作用沉淀出[[氢氧化铽]]，经过滤、灼烧，制得七氧化四铽。
:<math>\rm \ 4Tb(OH)_3+\tfrac{1}{2} O_2\rightarrow Tb_4O_7+6H_2O</math>

==用途==
用作[[钇铝石榴石|钇铝]]和[[钇铁石榴石]]掺入剂、荧光粉活化剂、制取金属[[铽]]的原料，以及作X射线增感纸用荧光体。

==参考资料==
{{reflist}}

{{铽化合物}}
{{氧化物}}

[[Category:铽化合物]]
[[Category:氧化物]]
[[Category:四价镧系元素化合物]]

{{无机化合物小作品}}