Table 2: Coefficients required for calculating evaporation and condensation rates. Data for $\rho$ and A from the CRC-handbook (Lide 1995). For V₀ and $\alpha$ see text.
Dust $\rho$ A V₀ $\alpha$

species g cm^-3 cm³

quartz 2.65 60.085 $3.80\times10^{-23}$ 0.05

iron 7.87 55.845 $1.19\times10^{-23}$ 0.9

forsterite 3.21 140.694 $7.33\times10^{-23}$ 0.1

fayalite 4.30 203.774

enstatite 3.19 100.389 $5.26\times10^{-23}$ 0.1

ferrosilite 4.00 131.93

olivine $7.55\times10^{-23}$ 0.1

pyroxene $5.35\times10^{-23}$ 0.1

**Table 2:** Coefficients required for calculating evaporation and condensation rates. Data for $\rho$ and A from the CRC-handbook (Lide 1995). For V₀ and $\alpha$ see text.
Dust	$\rho$	A	V₀	$\alpha$
species	g cm^-3		cm³
quartz	2.65	60.085	$3.80\times10^{-23}$	0.05
iron	7.87	55.845	$1.19\times10^{-23}$	0.9
forsterite	3.21	140.694	$7.33\times10^{-23}$	0.1
fayalite	4.30	203.774
enstatite	3.19	100.389	$5.26\times10^{-23}$	0.1
ferrosilite	4.00	131.93
olivine			$7.55\times10^{-23}$	0.1
pyroxene			$5.35\times10^{-23}$	0.1

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