Table 3 Representative chemical compositions of olivine and pyroxenes in the four Itokawa particles
From: Mineralogy of four Itokawa particles collected from the first touchdown site
Sample | |||||
|---|---|---|---|---|---|
RB-QD04-0008 | RB-QD04-0008 | RB-QD04-0011 | RB-QD04-0015 | RB-QD04-0024 | |
Mineral | |||||
Olivine | High-Ca pyroxene | Olivine | Olivine | Low-Ca pyroxene | |
SiO2 | 37.64 | 52.00 | 36.91 | 37.33 | 54.87 |
TiO2 | b. d. | 0.42 | b. d. | b. d. | 0.05 |
Al2O3 | b. d. | 0.45 | b. d. | b. d. | 0.08 |
Cr2O3 | b. d. | 0.77 | b. d. | b. d. | 0.15 |
FeO | 27.07 | 7.49 | 26.18 | 27.14 | 15.19 |
MnO | 0.50 | 0.21 | 0.43 | 0.42 | 0.40 |
MgO | 34.12 | 16.13 | 35.30 | 34.65 | 27.23 |
CaO | b. d. | 20.41 | b. d. | b. d. | 1.11 |
Na2O | b. d. | 0.43 | b. d. | b. d. | b. d. |
K2O | b. d. | b. d. | b. d. | b. d. | b. d. |
Total wt.% | 99.33 | 98.31 | 98.82 | 99.54 | 99.08 |
Mol% end members | Fo69.2 | Wo41.9En46.1 | Fo70.6 | Fo69.5 | Wo2.2En74.5 |