8 . 4 TABLE 8.1: COMPOSITION OF LUNAR ROCK AND SOIL Average compositions of rocks and soils returned by Apollo missions, excluding oxygen (45%) and elements present in amounts less than 1000 ppm. Rock AEollo 11 AJ2ollo 12 AEollo 14 AEollo 15 AEollo 16 Al 4.55 6 . 77 11. 34 4 . 57 14 . 49 Fe 14. 69 13. 52 6 . 05 16.88 3.45 Ti 7.31 1. 90 .69 1. 30 .26 Si 18 . 73 22.00 22.28 21. 53 20 . 97 Mg 4.67 4 . 10 4 . 40 6.31 3.91 Mn .19 .19 .09 .22 .05 _Cr .25 . 21 .17 .33 . 09 Ca > .65 8.15 9.33 7.04 11.18 Na .34 . 47 . 52 .23 . 32 K .25 .06 .40 . 05 . 07 p < . 09 .07 .18 .04 . 03 Soil Al 7. 36 7 . 14 9 . 31 9.09 14. 13 Fe 12 . 23 12 . 04 8.06 9 . 03 4 . 27 Ti 4 . 48 1. 59 1. 04 .81 .35 Si 1.9. 63 21. 67 22 . 38 21. 77 20.99 Mg 4. 76 5.87 5.57 6.31 3.59 Mn . 16 .16 .11 . 12 . 05 Cr . 20 .27 . 17 . 17 .08 Ca 8. 59 7.51 8.00 8.32 11 . 13 Na .33 . 44 . 50 . 34 . 36 K .12 .27 . 46 . 17 .11 p .05 .17 .23 . 08 .05 From H. J . Rose , Jr . , et al., "Compositional Data for Twenty-Two Apollo 16 Samples", Proceedings of the Fourth Lunar Science Conference, Vol. 2, pp. 1149-1158. Original data in oxide weight percent.
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