Table 1: Mass fractions fj and densities $\rho _j$ of dust constituents.

Material		 NRM IRS IPS
(grain species j) fj $\rho _j$ fj $\rho _j$ fj $\rho _j$
Olivine $2.64\times10^{-3}$ (3.49 g cm-3) $3.84\times10^{-3}$ (3.59 g cm-3) $6.30\times10^{-4}$ (3.20 g cm-3)
Iron $1.26\times10^{-4}$ (7.87 g cm-3) - $7.97\times10^{-4}$ (7.87 g cm-3)
Pyroxene $7.70\times10^{-4}$ (3.40 g cm-3) $4.44\times10^{-5}$ (3.42 g cm-3) 1.91-3 (3.20 g cm-3)
Troilite $7.68\times10^{-4}$ (4.83 g cm-3) $3.80\times10^{-4}$ (4.83 g cm-3) $7.68\times10^{-4}$ (4.83 g cm-3)
Refractory      
organics $3.53\times10^{-3}$ (1.50 g cm-3) $3.53\times10^{-3}$ (1.50 g cm-3) $3.53\times10^{-3}$ (1.50 g cm-3)
Volatile      
organics $6.02\times10^{-4}$ (1.00 g cm-3) $6.02\times10^{-4}$ (1.00 g cm-3) $6.02\times10^{-4}$ (1.00 g cm-3)
Water ice $5.55\times10^{-3}$ (0.92 g cm-3) $5.55\times10^{-3}$ (0.92 g cm-3) $5.55\times10^{-3}$ (0.92 g cm-3)


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