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Fig. B.1


Ambipolar (upper panel), Hall (middle panel), and Ohmic (lower panel) diffusion coefficients as a function of the mean grain radius computed at different molecular hydrogen densities: 105 (thick solid line), 106 (thick dashed line), 107 (thick dash-dotted line), 108 (dotted line), 109 (thin solid line), 1010 (thin dashed line), 1011 cm-3 (thin dash-dotted line), and 1012 cm-3 (thin dotted line).

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