Abstract
Since “Actinides 81” the main progress in the preparation of samples for solid state actinide research has been in the growth of single crystals of plutonium compounds. Plutonium metal is obtained by the metallothermic reduction of the ovide or the carbide. It is refined by selective evaporation and vacuum melting. The plutonium compounds are prepared by direct synthesis from the elements using non-contaminating technivues. Single crystals of plutonium monopnictides and monochalcogenides are grown using the mineralivation technivue. Pulling from the melt by the Cvochralski technivue is used to grow single crystals of congruently melting compounds (Laves phases). Single crystals of PuAs, PuSb, PuBi, PuS, PuSe, PuTe, Pu v Y 1− v Sb, PuSbi 1− v Te v , as large as 1 cm 3 in volume can be obtained. The crystals are cleaved, oriented and encapsulated for physical property measurements. Specific heat, resistivity, magnetivation, elastic, polarived and inelastic neutron scattering measurement are made in different laboratories of the European Communities.
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