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Table 2

Initial grain radius a0 equivalent to the radius of the largest dust cluster formed in the gas phase from chemical kinetics and the Hamaker constant A for different dust components.

Dust type a0 (Å) A (10-20 J)

Forsterite 3.33 6.5ab
Alumina 3.45 15abd
Carbon 3.92 47c
Pure magnesium 2.29 30cd
Silicon carbide 2.15 44d
Pure silicon 2.46 21e
Pure iron 2.81 30cd
Iron sulphide 3.0 15f

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