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Table 2 Average mineral compositions of four newly analyzed particles

From: Mineralogy and crystallography of some Itokawa particles returned by the Hayabusa asteroidal sample return mission

  RA-QD02-100 RA-QD02-133-1 RA-QD02-138 RA-QD02-179
  Plagioclase Olivine Plagioclase Olivine Olivine
SiO2 63.7 37.0 64.1 37.5 39.6
Al2O3 21.7 0.03 21.8 b.d. 0.05
TiO2 b.d. b.d. b.d. b.d. b.d.
FeO 0.09 26.3 0.11 26.6 23.5
MnO b.d. 0.41 b.d. 0.43 0.40
MgO 0.05 34.7 b.d. 34.5 36.5
CaO 2.25 b.d. 2.25 b.d. b.d.
Na2O 8.75 0.03 8.92 0.04 b.d.
K2O 0.78 b.d. 0.99 b.d. b.d.
Cr2O3 b.d. b.d. b.d. b.d. b.d.
NiO b.d. b.d. b.d. b.d. b.d.
P2O5 b.d.   b.d. b.d. b.d.
Total 97.3 98.5 98.2 99.1 100.1
Fo   70.2   69.8 73.4
Fa   29.8   30.1 26.6
An 11.9   11.5   
Ab 83.2   82.4   
Or 4.9   6.1   
  1. b.d., below detection.