Table 1 Chemical composition of typical phosphate grains.
From: Thermal and impact histories of 25143 Itokawa recorded in Hayabusa particles
Grain No. | RA-QD02-0056 | RA-QD02-0056 | RA-QD02-0056 | RA-QD02-0031 | RB-CV-0025 | RB-CV-0025 | RB-QD04-0025 |
|---|---|---|---|---|---|---|---|
Spot No. | 1 | 2 | 3 | 1 | 1 | 2 | 1 |
SiO2 | 0.29 | 1.48 | 2.40 | 0.26 | 3.59 | 0.37 | 3.756 |
TiO2 | 0.06 | n.d. | n.d. | n.d. | 0.08 | 0.15 | n.d. |
Al2O3 | n.d. | n.d. | n.d. | 0.01 | 0.03 | 0.14 | n.d. |
FeO | 0.10 | 0.26 | 1.12 | 1.18 | n.d. | n.d. | 2.592 |
MnO | n.d. | 0.02 | 0.04 | 0.04 | n.d. | n.d. | 0.04 |
MgO | n.d. | 0.47 | 2.13 | 3.56 | 7.58 | 4.02 | 7.79 |
CaO | 55.60 | 53.12 | 50.67 | 42.31 | 40.53 | 45.36 | 40.871 |
Na2O | 0.36 | 0.38 | 0.35 | 2.53 | 1.45 | 2.11 | 2.51 |
K2O | n.d. | 0.03 | 0.02 | 0.07 | n.d. | n.d. | 0.049 |
Cr2O3 | n.d. | n.d. | 0.02 | 0.44 | n.d. | n.d. | n.d. |
NiO | 0.02 | n.d. | 0.02 | n.d. | n.d. | n.d. | n.d. |
P2O5 | 42.80 | 40.11 | 38.67 | 42.69 | 37.32 | 42.32 | 39.589 |
SO3 | 0.07 | 0.11 | 0.04 | 0.06 | 0.01 | 0.01 | n.d. |
Cl | 5.54 | 3.65 | 3.68 | — | 9.39 | 5.53 | 0.226 |
Total | 103.59 | 99.45 | 98.66 | 93.15 | 99.98 | 100.01 | 97.382 |
