查看“︁三氧化二铽”︁的源代码

{{chembox
| verifiedrevid = 451892662
| ImageFile = Tl2O3structure.jpg 
| ImageSize = 
| IUPACName = terbium(III) oxide
| OtherNames = 氧化铽(III)<br />倍半氧化铽
| Section1 = {{Chembox Identifiers
|  Abbreviations = 
|  CASNo_Ref = {{cascite|correct|CAS}}
|  CASNo = 12036-41-8
|  EINECS = 234-849-5
|  PubChem = 159410
|  SMILES = [O-2].[O-2].[O-2].[Tb+3].[Tb+3] 
|  InChI = 1/3O.2Tb/q3*-2;2*+3
|  RTECS =
|  MeSHName =
|  ChEBI_Ref = {{ebicite|correct|EBI}}
|  ChEBI =
|  KEGG_Ref = {{keggcite|correct|kegg}}
|  KEGG = 
|  ATCCode_prefix = 
|  ATCCode_suffix = 
|  ATC_Supplemental =
}}
| Section2 = {{Chembox Properties
|  Tb = 2 | O = 3
|  Formula = 
|  MolarMass =
|  Appearance = 白色粉末
|  Density = 7.91 g/cm<sup>3</sup>
|  MeltingPtC = 2410
|  Melting_notes =
|  BoilingPt = 
|  Boiling_notes = 
|  Solubility = 
|  SolubleOther = 
|  MagneticSusceptibility = 0.07834 cm<sup>3</sub>/mol</sup>
|  Solvent = 
|  pKa = 
|  pKb = 
}}
| Section3 = {{Chembox Structure
|  CrystalStruct = [[立方晶系|立方]]，[[皮尔逊符号|cI80]]
|  SpaceGroup = Ia-3, No. 206<ref>{{cite journal| journal = J. Phys. F| year = 1973 | volume = 3| issue = 1 | page = 1–5| title = The observation of face centred cubic Gd, Tb, Dy, Ho, Er and Tm in the form of thin films and their oxidation|doi=10.1088/0305-4608/3/1/009| author = Curzon A.E., Chlebek H.G.}}</ref>
}}
| Section7 = {{Chembox Hazards
|  wxxfh = {{wxxfh|Xi}}
|  MainHazards = 
|  NFPA-H = 
|  NFPA-F = 
|  NFPA-R = 
|  NFPA-O =
|  RPhrases = {{R36/37/38}}
|  SPhrases = {{S26}}-{{S36}}
|  RSPhrases =
|  FlashPt = 
|  Autoignition = 
|  ExploLimits = 
|  PEL = 
}}
}}
'''三氧化二铽'''，化学式Tb<sub>2</sub>O<sub>3</sub>。

==性质==
白色粉末。与其他主要镧系氧化物类似，三氧化二铽有两种晶体结构。较稳定的一种结构是缺陷[[萤石]]型结构（[[方铁锰矿]]结构），晶格参数 a = 10.72 Å。<ref>N. C. Baenzinger, H. A. Eick, H. S. Schuldt, L. Eyring: ''Terbium Oxides. III. X-Ray Diffraction Studies of Several Stable Phases''. In: ''[[Journal of the American Chemical Society]]'', 1961, 83, 10, S. 2219-23.</ref> 另一种结构则为[[单斜晶系]]，可在熔融[[氧化铽]]／[[氧化镁]]结晶时生成。<ref>E. Hubbert-Paletta, Hk. Müller-Buschbaum: Röntgenographische Untersuchung an Einkristallen von monoklinem Tb<sub>2</sub>O<sub>3</sub>. In: Zeitschrift fiir anorganische und allgemeine Chemie, 1968, 363, S. 145-150, {{DOI|10.1002/zaac.19683630306}}.</ref>

三氧化二铽用[[钙]]掺杂后是一种[[p型半导体]]。<ref>{{cite journal en|journal=Solid State Ionics|volume=176|issue=39–40|pages=2957–2961|doi=10.1016/j.ssi.2005.09.030|publisher=Elsevier B.V.|title=Proton conductivity of Ca-doped {{chem|Tb|2|O|3}}|author=Reidar Haugsrud, Yngve Larring, and Truls Norby|date=December 2005}}</ref>

==制备==
单质[[铽]]与氧气化合时产生[[七氧化四铽]]，因此三氧化二铽不能通过单质化合来制备。它一般是通过用[[氢气]][[还原]][[七氧化四铽]]而制得（1300°C，24小时<ref>{{cite journal en|journal=Journal of Applied Crystallography|volume=4|issue=5|pages=399–400|doi=10.1107/S0021889871007295|title=Crystal data on C-type terbium sesquioxide ({{chem|Tb|2|O|3}})|author=G. J. McCarthy|date=October 1971}}</ref>）。<ref>N. N. Greenwood, A. Earnshaw: Chemie der Elemente. 1. Auflage, VCH Verlagsgesellschaft, 1988, ISBN 3-527-26169-9.</ref>
:<math>\rm \ Tb_4O_7 +  H_2 \rightarrow 2 Tb_2O_3 + H_2O</math>

==用途==
纯三氧化二铽的用途很少。它可用作制取[[七氧化四铽]]的原料。

==参考资料==
{{reflist}}

{{铽化合物}}
{{氧化物}}

[[Category:铽化合物]]
[[Category:氧化物]]