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. 2020 Sep 29;59(4):683–692. doi: 10.1007/s00411-020-00870-x

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© The Author(s) 2020

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Fig. 2 — Statistical distribution of MnO₂ particle diameters. Vertical axis: frequency, relative units. Horizontal axis- diameter of particles, µm. Mean diameter of MnO₂ particles is equal to 8.1 µm