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Fig. 4
Timescale for water vapour to make up ~2.7% in mass of a silicate grain with radius 0.1 μm, 1 μm, and 1 mm with respectively 5, 58, and 60 000 silicate core layers. The gas density is n<H > = 108 cm−3. The timescales are capped at 108 yr.
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