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Particle size distribution (Granulometry)

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The mean particles size of a representative sample of ammonium octamolybdate has been determined (laser diffraction): D50 = ca. 3.4 µm.
Mass median aerodynamic diameters of airborne fraction (rotating drum method): MMAD1 = 4.56 µm (31.5%) , MMAD2 = 33.25 µm (68.5%) (bi-modal distribution fitted to cascade impactor data, percentage in parentheses indicates weighting factor).

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