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Revision as of 18:57, 22 September 2011 editCheMoBot (talk | contribs)Bots141,565 edits Updating {{chembox}} (changes to watched fields - updated 'ChemSpiderID_Ref', 'DrugBank_Ref', 'UNII_Ref', 'ChEMBL_Ref', 'ChEBI_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref') per Chem/Drugbox validation (report [[Wikipedia_talk:WikiProject_← Previous edit Latest revision as of 09:12, 24 June 2023 edit undoCitation bot (talk | contribs)Bots5,423,883 edits Add: bibcode. | Use this bot. Report bugs. | Suggested by Spinixster | Category:Semiconductor materials | #UCB_Category 8/51 
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{{chembox {{chembox
| Watchedfields = changed | Watchedfields = changed
| verifiedrevid = 413079317 | verifiedrevid = 451892662
| ImageFile = Tl2O3structure.jpg | ImageFile = Tl2O3structure.jpg
| ImageSize = | ImageSize =
| IUPACName = terbium(III) oxide | IUPACName = terbium(III) oxide
| OtherNames = terbium trioxide, terbia, terbium sesquioxide | OtherNames = terbium trioxide, terbia, terbium sesquioxide
| Section1 = {{Chembox Identifiers | Section1 = {{Chembox Identifiers
| Abbreviations = | Abbreviations =
| CASNo_Ref = {{cascite}} | CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 12036-41-8 | CASNo = 12036-41-8
| EINECS = 234-849-5 | EINECS = 234-849-5
| PubChem = 159410 | PubChem = 159410
| SMILES = | SMILES = ....
| InChI = 1/3O.2Tb/q3*-2;2*+3 | InChI = 1/3O.2Tb/q3*-2;2*+3
| RTECS = | RTECS =
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| KEGG_Ref = {{keggcite|correct|kegg}} | KEGG_Ref = {{keggcite|correct|kegg}}
| KEGG = | KEGG =
}}
| ATCCode_prefix =
⚫ | Section2 = {{Chembox Properties
| ATCCode_suffix =
⚫ | Tb=2 | O=3
| ATC_Supplemental =}}
⚫ | Section2 = {{Chembox Properties
⚫ | Tb = 2 | O = 3
| Formula = | Formula =
| MolarMass = | MolarMass =
| Appearance = white crystals | Appearance = white crystals
| Density = 7.9 g cm<sup>−3</sup> | Density = 7.91 g/cm<sup>3</sup>
| MeltingPtC = 2410 | MeltingPtC = 2410
| Melting_notes = | MeltingPt_notes =
| BoilingPt = | BoilingPt =
| Boiling_notes = | BoilingPt_notes =
| Solubility = | Solubility =
| SolubleOther = | SolubleOther =
| MagneticSusceptibility = 0.07834 cm<sup>3</sub>/mol | MagSus = 0.07834 cm<sup>3</sup>/mol
| Solvent = | Solvent =
| pKa = | pKa =
| pKb = | pKb =
}} }}
| Section3 = {{Chembox Structure | Section3 = {{Chembox Structure
| CrystalStruct = ], ] | CrystalStruct = ], ]
| 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> | SpaceGroup = Ia{{overline|3}}, No. 206<ref>{{cite journal| journal = J. Phys. F| year = 1973 | volume = 3| issue = 1 | pages = 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|author1=Curzon A.E. |author2=Chlebek H.G. | bibcode = 1973JPhF....3....1C }}</ref>
| LattConst_a = 1.057 nm
}} }}
| Section7 = {{Chembox Hazards | Section4 = {{Chembox Thermochemistry
| DeltaGf = -1776.553 kJ/mol <ref name=usgs>R. Robie, B. Hemingway, and J. Fisher, "Thermodynamic Properties of Minerals and Related Substances at 298.15K and 1bar Pressure and at Higher Temperatures," US Geol. Surv., vol. 1452, 1978.</ref>
| EUClass = not listed
| EUIndex = | DeltaHc =
| DeltaHf = -1865.23 kJ/mol <ref name=usgs />
| Entropy = 156.90 J/mol·K <ref name=usgs />
| HeatCapacity =
}}
| Section7 = {{Chembox Hazards
| MainHazards = | MainHazards =
| NFPA-H = | NFPA-H =
| NFPA-F = | NFPA-F =
| NFPA-R = | NFPA-R =
| NFPA-O = | NFPA-S =
| GHSPictograms = {{GHS07}}{{GHS09}}
| RPhrases =
| GHSSignalWord = Warning
| SPhrases =
| HPhrases = {{H-phrases|319|410}}
| RSPhrases =
| PPhrases = {{P-phrases|264|273|280|305+351+338|337+313|391|501}}
| FlashPt = | FlashPt =
| Autoignition = | AutoignitionPt =
| ExploLimits = | ExploLimits =
| PEL = }} | PEL = }}
| Section8 = {{Chembox Related
| OtherAnions = ]
| OtherCations = ]<br>]
}}
}} }}


'''Terbium(III) oxide''', also known as '''terbium sesquioxide''', is a ] of the rare earth metal ], having ] {{chem|Tb|2|O|3}}. It is a p-type ] when doped with ],<ref>{{cite journal|journal=Solid State Ionics|volume=176|issue=39&ndash;40|month=December | year=2005|pages=2957&ndash;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}}</ref> and may be prepared by the reduction of ] in ] at 1300 °C for 24 hours.<ref>{{cite journal|journal=Journal of Applied Crystallography|volume=4|issue=5|month=October | year=1971|pages=399&ndash;400|doi=10.1107/S0021889871007295|title=Crystal data on C-type terbium sesquioxide ({{chem|Tb|2|O|3}})|author=G. J. McCarthy}}</ref> '''Terbium(III) oxide''', also known as '''terbium sesquioxide''', is a ] of the rare earth metal ], having ] {{chem|Tb|2|O|3}}. It is a p-type ], which conducts protons, which is enhanced when doped with ].<ref>{{cite journal|journal=Solid State Ionics|volume=176|issue=39&ndash;40|date=December 2005|pages=2957&ndash;2961|doi=10.1016/j.ssi.2005.09.030|publisher=Elsevier B.V.|title=Proton conductivity of Ca-doped {{chem|Tb|2|O|3}}|author1=Reidar Haugsrud |author2=Yngve Larring |author3=Truls Norby |name-list-style=amp }}</ref> It may be prepared by the reduction of ] in ] at 1300&nbsp;°C for 24 hours.<ref>{{cite journal|journal=Journal of Applied Crystallography|volume=4|issue=5|date=October 1971|pages=399&ndash;400|doi=10.1107/S0021889871007295|title=Crystal data on C-type terbium sesquioxide ({{chem|Tb|2|O|3}})|author=G. J. McCarthy}}</ref>


:{{chem2|Tb4O7 + H2 -> 2 Tb2O3 + H2O}}
It is a p-type ].<ref>{{cite journal|journal=Solid State Ionics|volume=176|issue=39-40|month=December | year=2005|pages=2957&ndash;2961|doi=10.1016/j.ssi.2005.09.030|publisher=Elsevier B.V.|title=Proton conductivity of Ca-doped Tb<sub>2</sub>O<sub>3</sub>|author=Reidar Haugsrud, Yngve Larring, and Truls Norby}}</ref>


It is a basic oxide and easily dissolved to dilute acids, and then almost colourless terbium salt is formed. It is a basic oxide and easily dissolved to dilute acids, and then almost colourless terbium salt is formed.
: Tb<sub>2</sub>O<sub>3</sub> + 6 H<sup>+</sup> → 2 Tb<sup>3+</sup> + 3 H<sub>2</sub>O : Tb<sub>2</sub>O<sub>3</sub> + 6 H<sup>+</sup> → 2 Tb<sup>3+</sup> + 3 H<sub>2</sub>O


The crystal structure is ] and the ] is ''a'' = 1057 pm.<ref>N. C. Baenzinger, H. A. Eick, H. S. Schuldt, L. Eyring: ''Terbium Oxides. III. X-Ray Diffraction Studies of Several Stable Phases''. In: '']'', 1961, 83, 10, S. 2219-23.</ref> The crystal structure is ] and the ] is ''a'' = 1057 pm.<ref name="Baenzinger">N. C. Baenzinger, H. A. Eick, H. S. Schuldt, L. Eyring: ''Terbium Oxides. III. X-Ray Diffraction Studies of Several Stable Phases''. In: '']'', 1961, 83, 10, S. 2219-23.</ref>


==References== ==References==
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{{Terbium compounds}} {{Terbium compounds}}
{{Oxides}}


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