Abstract
Ytterbium dichloride was prepared in pure form by the oxidation of elemental ytterbium by ZnCl 2 with subsequent removal of the zinc impurities by sublimation. Ytterbium dibromide in the orthorhombic SrI 2-type structural form was prepared in a sealed tantalum container by reduction of the tribromide with elemental ytterbium at a temperature not exceeding 960°C for 15 min. The dihalides, mixed intimately in appropriate molar ratios in a glove-box and contained in pyrolytic graphite boats, were melted under vacuum. These two halides form a solid solution with the SrI 2-type structure. Lattice parameters are reported as a function of composition.
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