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Magnetic susceptibility measurements have been made on Pr2O3, PrO1.72, PrO1.83, and PrO2 from liquid-helium to room temperatures. The results are interpreted in terms of the crystal fields acting upon the cation for Pr2O3 and PrO2. For these two compounds, D3d symmetry was assumed for the disposition of oxygen ions about the cation, in order to explain the susceptibility results. A total crystal field splitting of 935 cm—1 is obtained for the ground multiplet of PrO2 and 1383 cm—1 for Pr2O3.
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Sanford Kern (1964) studied this question.
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