| 21. | Cauchois systematically studied the x-ray spectra of heavy elements and actinides.
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| 22. | Like the lanthanides, the actinides form a family of elements with similar properties.
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| 23. | All actinides form AnH 3 hydrides of black color with salt-like properties.
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| 24. | A key need is application of actinide solid solutions in durable crystalline host phases.
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| 25. | Silicon-34 also occurs naturally as the result of radioactive decay of actinides.
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| 26. | A series of different matrices exists which can control this production of heavy actinides.
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| 27. | The two forms of IFR waste produced, contain no plutonium or other actinides.
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| 28. | All plutonium isotopes and other actinides, however, are fissionable with fast neutrons.
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| 29. | Plutonium like other actinides readily forms a dioxide plutonyl core ( PuO 2 ).
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| 30. | Uranium like other actinides readily forms a dioxide uranyl core ( UO 2 ).
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