Abstract
In this communication the variation of density and thermal expansion of oxides of praseodymium and dysprosium with temperature is studied and reported. The gamma ray attenuation technique is employed to carry out the study with a gamma ray densitometer fitted with high temperature furnace designed in our laboratory. The temperature dependent quantities such as linear gamma ray attenuation (μ 1), density (ρ) and the coefficient of linear thermal expansion (α)of Pr6O11 and Dy2O3 have been fit to a second degree polynomial equation.
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