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Table 1 Major and minor element compositions of adhering and host grains (oxide wt.%) obtained by energy dispersive X-ray spectroscopy (EDS)

From: Adhering grains and surface features on two Itokawa particles

  Adhering grains Host grains
  Chromite
Fig. 4a
Si-rich material
Fig. 4a
Adhering olivine
Fig. 4e
Top of the fluffy grain
Fig. 4e
Bottom of the fluffy grain
Fig. 4e
Phosphate
Fig. 4d
Adhering grain
Fig. 4f
Fig. 4a Fig. 4b Fig. 4c Fig. 4d Fig. 4e Fig. 4f
SiO2 0.0 60.0 39.2 96.2 40.7 0.0 65.2 40.7 38.4 76.2 67.9 40.9 64.3
Al2O3 8.5 17.4 0.0 0.0 0.0 0.0 22.9 0.0 0.0 22.3 23.1 0.0 22.1
Cr2O3 60.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
FeO 31.0 9.4 19.3 3.8 24.3 0.0 0.0 21.2 24.6 0.0 0.0 21.7 0.0
MgO 0.0 11.9 41.5 0.0 35.0 0.0 0.0 38.1 37.0 0.0 0.0 37.3 0.0
CaO 0.0 1.2 0.0 0.0 0.0 51.5 2.2 0.0 0.0 0.0 2.2 0.0 2.2
Na2O 0.0 0.0 0.0 0.0 0.0 0.0 6.1 0.0 0.0 1.5 6.2 0.0 10.5
K2O 0.0 0.0 0.0 0.0 0.0 0.0 3.6 0.0 0.0 0.0 0.6 0.0 0.9
P2O5       48.5     0.0 0.0   
Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
Structural formulae
 Si 0.0   1.0    0.0 11.5 1.0 1.0   11.7 1.1 11.4
 Al 2.8   0.0    0.0 4.8 0.0 0.0   4.7 0.0 4.6
 Cr 13.6   0.0    0.0 0.0 0.0 0.0   0.0 0.0 0.0
 Fe 7.4   0.4    0.0 0.0 0.5 0.5   0.0 0.5 0.0
 Mg 0.0   1.6    0.0 0.0 1.5 1.5   0.0 1.4 0.0
 Ca 0.0   0.0    19.6 0.4 0.0 0.0   0.4 0.0 0.4
 Na 0.0   0.0    0.0 2.1 0.0 0.0   2.1 0.0 3.6
 K 0.0   0.0    0.0 0.8 0.0 0.0   0.1 0.0 0.2
 P 0.0   0.0    14.6 0.0 0.0 0.0   0.0 0.0 0.0
  1. Olivine-the structural formula was calculated on the basis of 4 oxygen. Chromite and plagioclase-the structural formula was calculated on the basis of 32 oxygen. Phosphate-the structural formula was calculated on the basis of 56 oxygen