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The mean bulk and grain densities were determined to be 3.43 g/cm$^\\text{3}$ with standard deviation (s.d.) of 0.11 g/cm$^\\text{3}$ and 3.79 g/cm$^\\text{3}$ with s.d. 0.07 g/cm$^\\text{3}$, respectively. Porosity is in the range from 4.2 to 16.1%. The logarithm of the apparent magnetic susceptibility (in 10$^\\text{-9}$ m$^\\text{3}$/kg) shows narrow distribution from 5.17 to 5.49 with mean value at 5.35 with s.d. 0.08. 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