Plutonium hydride: Difference between revisions
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| IUPACName = Plutonium dihydride |
| IUPACName = Plutonium dihydride (excess hydrogen) |
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| OtherNames = |
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| SystematicName = Plutonium(2+) hydride |
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| OtherNames = Plutonium dihydride<br /> |
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Plutonium(II) hydride<br /> |
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Plutonous hydride |
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| CASNo = 17336-52-6 |
| CASNo = 17336-52-6 |
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| CASNo_Ref = {{cascite|correct|??}} |
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| ChemSpiderID = 57566567 |
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| Formula = PuH<sub>2</sub> |
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| StdInChI = 1S/Pu.2H/q+2;2*-1 |
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| MolarMass = 246.0801 g/[[mol]] |
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| StdInChI_Ref = {{stdinchicite|changed|chemspider}} |
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| StdInChIKey = IPKHWWGTRXXYCX-UHFFFAOYSA-N |
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| Section3 = {{Chembox Hazards |
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| MainHazards = pyrophoric |
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| H=2 | Pu=1 |
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⚫ | '''Plutonium hydride''' is a [[Non-stoichiometric compound|non-stoichiometric chemical compound]] with the formula PuH{{sub|2+x}}. It is one of two characterized hydrides of plutonium; the other is PuH{{sub|3}}.<ref name = "Meyer">Gerd Meyer, 1991, Synthesis of Lanthanide and Actinide Compounds Springer, {{ISBN|0-7923-1018-7}}.</ref> PuH{{sub|2+x}} is [[non-stoichiometric]] with a composition range of PuH{{sub|2}} – PuH{{sub|2.7}}. Metastable stoichiometries with an excess of hydrogen (PuH{{sub|2.7}} – PuH{{sub|3}}) can also be formed.<ref name = "Meyer"/> PuH{{sub|2}} has a cubic structure. It is readily formed from the elements at 1 atmosphere at 100–200°C:<ref name = "Meyer"/> When the stoichiometry is close to PuH{{sub|2}} it has a silver appearance, but gets blacker as the hydrogen content increases, additionally the color change is associated with a reduction in conductivity.<ref>The Chemistry of the Actinide and Transactinide Elements, Lester R. Morss, Norman M. Edelstein, J. Fuger, Springer, 2010, {{ISBN|9789048131464}}</ref> |
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⚫ | '''Plutonium hydride''' is |
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⚫ | Studies of the reaction of plutonium metal with moist air at 200–350°C showed the presence of cubic plutonium hydride on the surface along with Pu{{sub|2}}O{{sub|3}}, [[plutonium dioxide|PuO{{sub|2}}]] and a higher oxide identified by X-ray diffraction and X-ray photoelectron spectroscopy as the mixed-valence phase Pu{{sup|IV}}{{sub|3−x}}Pu{{sup|VI}}{{sub|x}}O{{sub|6+x}}.<ref>J. L. Stakebake, D. T. Larson, J. M. Haschke: Characterization of the Plutonium-water Reaction II: Formation of a Binary Oxide containing Pu(VI), Journal of Alloys and Compounds, 202, 1–2, 1993, 251–263, {{doi|10.1016/0925-8388(93)90547-Z}}.</ref> Investigation of the reaction performed without heating suggests that the reaction of Pu metal and moist air the production of PuO{{sub|2}} and a higher oxide along with adsorbed hydrogen, which catalytically combines with O{{sub|2}} to form water.<ref>J. M. Haschke, T. H. Allen, L. A. Morales: Surface and Corrosion Chemistry of Plutonium, [[Los Alamos Science]], 2000, 252.</ref> |
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⚫ | Plutonium dihydride on the surface of hydrided plutonium acts as a catalyst for the oxidation of the metal with consumption of both O{{sub|2}} and N{{sub|2}} from air.<ref>John M. Haschke Thomas H. Allen: Plutonium Hydride, Sesquioxide and Monoxide Monohydride: Pyrophoricity and Catalysis of Plutonium Corrosion, Journal of Alloys and Compounds, 320, 1, 2001, 58–71, {{doi|10.1016/S0925-8388(01)00932-X}}.</ref> |
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⚫ | Studies of the reaction of plutonium metal with moist air at 200–350 |
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⚫ | Plutonium dihydride on the surface of hydrided plutonium acts as a catalyst for the oxidation of the metal with consumption of both O |
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== References == |
== References == |
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{{ |
{{Reflist}} |
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{{Plutonium compounds}} |
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{{hydrides by group}} |
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[[Category:Plutonium compounds]] |
[[Category:Plutonium compounds]] |
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[[Category:Metal hydrides]] |
[[Category:Metal hydrides]] |
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[[Category:Non-stoichiometric compounds]] |
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[[fr:Dihydrure de plutonium]] |